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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
Posted to comp.sys.laptops,comp.sys.hp.hardware,uk.comp.sys.laptops,comp.sys.ibm.pc.hardware.misc,sci.electronics.repair
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Service manual to dismantle and replace power supply on HP Pavilion ZT3380
Does anyone know how to replace a power supply in an HP Pavilion ZT3380
laptop please? The power plug seems to be exceptionally loose and if the computer shuts down, you can occasionally get it turned on again by turning the plug around in the socket 180 degrees so that something makes contact with something again. But I don't think this is the whole story. The computer does work as a desktop but once it did shut down overnight for no apparent reason and once during use while I was trying to soak-test it for this very problem. When it shut down overnight, by the morning, when I turned it on, the orange charge light having presumably been on all night, it showed 0% charge. Suspicious. More importantly it shuts down completely if you accidentally jiggle the plug, not going to battery power at all. In addition, when you start it with a largely dead battery and then try to plug it in to charge the battery, the battery doesn't charge at all. It CAN also show an orange charge light overnight when off and by the morning, show no increase in charge: This doesn't just seem to be a loose plug! I upgraded the BIOS and this seemed to improve things for a very short while, with the new BIOS having a battery calibration utility which worked once. However, now it wont even charge the System Battery except excruciatingly slowly. Isn't the system battery something like a rechargeable CR2025? Which should discharge/charge in a few minutes. When the battery utility did discharge/recharge the main battery, it did do it in around a half an hour. We HAVE tried changing the AC adapter in case the problem was with the internal wiring of the plug itself and isolated that as not being the issue. Someone once referred me to a service manual for my Pavilion 5415 which had a similar problem but I cant now find the reference to it (and replacing the power supply for the 5415 involved a completely uneconomical taking apart of the whole computer down virtually to the last screw!). These internal power supplies do occasionally come up on ebay and sell for a few bucks. possibly for this reason? Hopefully the situation wont be the same for the 3880? Though an alarming number of them seem to come up very cheaply at places like Fry's, - reconditioned . (Incidentally it refers to itself on its screen panel as a ZT3000, on its underside as a ZT3300 and on it serial number plate as a ZT3380US) |
#2
Posted to comp.sys.laptops,comp.sys.hp.hardware,uk.comp.sys.laptops,comp.sys.ibm.pc.hardware.misc,sci.electronics.repair
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Service manual to dismantle and replace power supply on HP Pavilion ZT3380
In comp.sys.ibm.pc.hardware.misc news.rcn.com news.rnc.com wrote:
Does anyone know how to replace a power supply in an HP Pavilion ZT3380 laptop please? The power plug seems to be exceptionally loose and if the computer shuts down, you can occasionally get it turned on again by turning the plug around in the socket 180 degrees so that something makes contact with something again. But I don't think this is the whole story. The computer does work as a desktop but once it did shut down overnight for no apparent reason and once during use while I was trying to soak-test it for this very problem. When it shut down overnight, by the morning, when I turned it on, the orange charge light having presumably been on all night, it showed 0% charge. Suspicious. More importantly it shuts down completely if you accidentally jiggle the plug, not going to battery power at all. In addition, when you start it with a largely dead battery and then try to plug it in to charge the battery, the battery doesn't charge at all. It CAN also show an orange charge light overnight when off and by the morning, show no increase in charge: This doesn't just seem to be a loose plug! I upgraded the BIOS and this seemed to improve things for a very short while, with the new BIOS having a battery calibration utility which worked once. However, now it wont even charge the System Battery except excruciatingly slowly. Isn't the system battery something like a rechargeable CR2025? Which should discharge/charge in a few minutes. When the battery utility did discharge/recharge the main battery, it did do it in around a half an hour. A CR2025 explodes if you charge it. We HAVE tried changing the AC adapter in case the problem was with the internal wiring of the plug itself and isolated that as not being the issue. Someone once referred me to a service manual for my Pavilion 5415 which had a similar problem but I cant now find the reference to it (and replacing the power supply for the 5415 involved a completely uneconomical taking apart of the whole computer down virtually to the last screw!). These internal power supplies do occasionally come up on ebay and sell for a few bucks. possibly for this reason? Hopefully the situation wont be the same for the 3880? Though an alarming number of them seem to come up very cheaply at places like Fry's, - reconditioned . (Incidentally it refers to itself on its screen panel as a ZT3000, on its underside as a ZT3300 and on it serial number plate as a ZT3380US) It may just be a contacrt problem. THese are best tackled with contact spary and bending the contact so that is presses firmer on the plug. Arno |
#3
Posted to comp.sys.laptops,comp.sys.hp.hardware,uk.comp.sys.laptops,comp.sys.ibm.pc.hardware.misc,sci.electronics.repair
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Service manual to dismantle and replace power supply on HP Pavilion ZT3380
"Arno Wagner" wrote in message ... In comp.sys.ibm.pc.hardware.misc news.rcn.com news.rnc.com wrote: Does anyone know how to replace a power supply in an HP Pavilion ZT3380 laptop please? The power plug seems to be exceptionally loose and if the computer shuts down, you can occasionally get it turned on again by turning the plug around in the socket 180 degrees so that something makes contact with something again. But I don't think this is the whole story. The computer does work as a desktop but once it did shut down overnight for no apparent reason and once during use while I was trying to soak-test it for this very problem. When it shut down overnight, by the morning, when I turned it on, the orange charge light having presumably been on all night, it showed 0% charge. Suspicious. More importantly it shuts down completely if you accidentally jiggle the plug, not going to battery power at all. In addition, when you start it with a largely dead battery and then try to plug it in to charge the battery, the battery doesn't charge at all. It CAN also show an orange charge light overnight when off and by the morning, show no increase in charge: This doesn't just seem to be a loose plug! I upgraded the BIOS and this seemed to improve things for a very short while, with the new BIOS having a battery calibration utility which worked once. However, now it wont even charge the System Battery except excruciatingly slowly. Isn't the system battery something like a rechargeable CR2025? Which should discharge/charge in a few minutes. When the battery utility did discharge/recharge the main battery, it did do it in around a half an hour. A CR2025 explodes if you charge it. Yes, I suspected that: So the problem may well be with the CMOS battery itself? The utility at first stopped the charging process at 99%. Thereafter, it wont get much past about 8-10%. I wonder if this could account for the whole problem? (see below) Actually when I now go into the BIOS utility, I am not offered the option of calibrating the Main Battery any more (I did go through the process of recalibrating the main battery, - successfully, - once), just the "system" one We HAVE tried changing the AC adapter in case the problem was with the internal wiring of the plug itself and isolated that as not being the issue. Someone once referred me to a service manual for my Pavilion 5415 which had a similar problem but I cant now find the reference to it (and replacing the power supply for the 5415 involved a completely uneconomical taking apart of the whole computer down virtually to the last screw!). These internal power supplies do occasionally come up on ebay and sell for a few bucks. possibly for this reason? Hopefully the situation wont be the same for the 3880? Though an alarming number of them seem to come up very cheaply at places like Fry's, - reconditioned . (Incidentally it refers to itself on its screen panel as a ZT3000, on its underside as a ZT3300 and on it serial number plate as a ZT3380US) It may just be a contacrt problem. These are best tackled with contact spary and bending the contact so that is presses firmer on the plug. The reason why I included such an amount of detail in what could be a contact problem is because MOST OF these symptoms don't seem to point to a contact problem. Such as: Why can't it switch from ac to (a fully charged) main battery like all other computers when you simply take out the plug? Why does it shut down completely when you arent actually doing anything on the computer if it is a contact problem? Unless the contacts inside the socket are completely burned out, carbonised and pitted, why doesnt it charge the battery on re-plug in if it is just a contact problem? If it IS just a contact problem, surely just spraying it with WD40 will make the problem completely go away for at least a while until the metal under the 'oil' starts encountering the carbon again? And for fear of repeating myself, why am I getting all these mysterious problems with the calibration utility if the problem is with the contacts? Arno |
#4
Posted to comp.sys.laptops,sci.electronics.repair
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Service manual to dismantle and replace power supply on HP PavilionZT3380
news.rcn.com wrote:
Does anyone know how to replace a power supply in an HP Pavilion ZT3380 laptop please? The power plug seems to be exceptionally loose and if the computer shuts down, you can occasionally get it turned on again by turning the plug around in the socket 180 degrees so that something makes contact with something again. But I don't think this is the whole story. The computer does work as a desktop but once it did shut down overnight for no apparent reason and once during use while I was trying to soak-test it for this very problem. When it shut down overnight, by the morning, when I turned it on, the orange charge light having presumably been on all night, it showed 0% charge. Suspicious. More importantly it shuts down completely if you accidentally jiggle the plug, not going to battery power at all. In addition, when you start it with a largely dead battery and then try to plug it in to charge the battery, the battery doesn't charge at all. It CAN also show an orange charge light overnight when off and by the morning, show no increase in charge: This doesn't just seem to be a loose plug! I upgraded the BIOS and this seemed to improve things for a very short while, with the new BIOS having a battery calibration utility which worked once. However, now it wont even charge the System Battery except excruciatingly slowly. Isn't the system battery something like a rechargeable CR2025? Which should discharge/charge in a few minutes. When the battery utility did discharge/recharge the main battery, it did do it in around a half an hour. We HAVE tried changing the AC adapter in case the problem was with the internal wiring of the plug itself and isolated that as not being the issue. Someone once referred me to a service manual for my Pavilion 5415 which had a similar problem but I cant now find the reference to it (and replacing the power supply for the 5415 involved a completely uneconomical taking apart of the whole computer down virtually to the last screw!). These internal power supplies do occasionally come up on ebay and sell for a few bucks. possibly for this reason? Hopefully the situation wont be the same for the 3880? Though an alarming number of them seem to come up very cheaply at places like Fry's, - reconditioned . (Incidentally it refers to itself on its screen panel as a ZT3000, on its underside as a ZT3300 and on it serial number plate as a ZT3380US) Sounds like the power connector is coming loose from the main motherboard. Not uncommon with a laptop. Especially if it was ever banged around with the charge cable connected. If it is coming loose it can cause ALL the problems your seeing. You need to open the machine and resolder the connections, or replace the power connector itself it it is damaged. The connector is not JUST a connector, they usually have a couple of switches inside as well as the charger circuit having current and voltage detection as well. With the loose connections you get the symptoms your seeing. One time the charger works fine and the battery gets charged, the next the machine is dead because it doesn't get power from either source. Then you get the Dell, HP and Toshiba all have had this same problem at one time or another. -- Steve W. Near Cooperstown, New York -- Steve W. Near Cooperstown, New York NRA Member Pacifism - The theory that if they'd fed Jeffrey Dahmer enough human flesh, he'd have become a vegan. |
#5
Posted to comp.sys.laptops,comp.sys.hp.hardware,uk.comp.sys.laptops,comp.sys.ibm.pc.hardware.misc,sci.electronics.repair
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Service manual to dismantle and replace power supply on HP Pavilion ZT3380
In comp.sys.ibm.pc.hardware.misc news.rcn.com news.rnc.com wrote:
"Arno Wagner" wrote in message ... In comp.sys.ibm.pc.hardware.misc news.rcn.com news.rnc.com wrote: Does anyone know how to replace a power supply in an HP Pavilion ZT3380 laptop please? The power plug seems to be exceptionally loose and if the computer shuts down, you can occasionally get it turned on again by turning the plug around in the socket 180 degrees so that something makes contact with something again. But I don't think this is the whole story. The computer does work as a desktop but once it did shut down overnight for no apparent reason and once during use while I was trying to soak-test it for this very problem. When it shut down overnight, by the morning, when I turned it on, the orange charge light having presumably been on all night, it showed 0% charge. Suspicious. More importantly it shuts down completely if you accidentally jiggle the plug, not going to battery power at all. In addition, when you start it with a largely dead battery and then try to plug it in to charge the battery, the battery doesn't charge at all. It CAN also show an orange charge light overnight when off and by the morning, show no increase in charge: This doesn't just seem to be a loose plug! I upgraded the BIOS and this seemed to improve things for a very short while, with the new BIOS having a battery calibration utility which worked once. However, now it wont even charge the System Battery except excruciatingly slowly. Isn't the system battery something like a rechargeable CR2025? Which should discharge/charge in a few minutes. When the battery utility did discharge/recharge the main battery, it did do it in around a half an hour. A CR2025 explodes if you charge it. Yes, I suspected that: So the problem may well be with the CMOS battery itself? The utility at first stopped the charging process at 99%. Thereafter, it wont get much past about 8-10%. I wonder if this could account for the whole problem? (see below) Actually when I now go into the BIOS utility, I am not offered the option of calibrating the Main Battery any more (I did go through the process of recalibrating the main battery, - successfully, - once), just the "system" one We HAVE tried changing the AC adapter in case the problem was with the internal wiring of the plug itself and isolated that as not being the issue. Someone once referred me to a service manual for my Pavilion 5415 which had a similar problem but I cant now find the reference to it (and replacing the power supply for the 5415 involved a completely uneconomical taking apart of the whole computer down virtually to the last screw!). These internal power supplies do occasionally come up on ebay and sell for a few bucks. possibly for this reason? Hopefully the situation wont be the same for the 3880? Though an alarming number of them seem to come up very cheaply at places like Fry's, - reconditioned . (Incidentally it refers to itself on its screen panel as a ZT3000, on its underside as a ZT3300 and on it serial number plate as a ZT3380US) It may just be a contacrt problem. These are best tackled with contact spary and bending the contact so that is presses firmer on the plug. The reason why I included such an amount of detail in what could be a contact problem is because MOST OF these symptoms don't seem to point to a contact problem. Such as: Why can't it switch from ac to (a fully charged) main battery like all other computers when you simply take out the plug? Why does it shut down completely when you arent actually doing anything on the computer if it is a contact problem? Unless the contacts inside the socket are completely burned out, carbonised and pitted, why doesnt it charge the battery on re-plug in if it is just a contact problem? If it IS just a contact problem, surely just spraying it with WD40 will make the problem completely go away for at least a while until the metal under the 'oil' starts encountering the carbon again? And for fear of repeating myself, why am I getting all these mysterious problems with the calibration utility if the problem is with the contacts? Hmm. Agreed. Sounds more like an issue with the entire power unit in the laptop. Maybe a swithcing transistor that has a problem or the like. Very hard to diagnise without shematics and the right equipment. Arno |
#6
Posted to comp.sys.laptops,comp.sys.hp.hardware,uk.comp.sys.laptops,comp.sys.ibm.pc.hardware.misc,sci.electronics.repair
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Service manual to dismantle and replace power supply on HP Pavilion ZT3380
On Sep 3, 1:27 pm, "news.rcn.com" news.rnc.com wrote:
If it IS just a contact problem, surely just spraying it with WD40 will make the problem completely go away for at least a while until the metal under the 'oil' starts encountering the carbon again? And for fear of repeating myself, why am I getting all these mysterious problems with the calibration utility if the problem is with the contacts? Contacts are self cleaning. That applies both to connectors and to contacts on battery. You are speculating what is a problem; then trying to fix based only on speculation. In but minutes with a meter you (or those who can provide better information) would know rather than just speculate. Everything posted is just speculation. Anyone with sufficient technical knowledge to provide a useful answer will post nothing - because no useful facts have been provided. For example, what is that battery voltage? Now we can say if the battery is charged. What is battery voltage when connected in system or voltage on connector to that battery; measured when AC power is applied and is disconnected. Why are you getting weird calibration problems? Nobody who could answer that question will even post because you don't provide numbers necessary to answer that question. First essential numbers are in the previous paragraph. Meanwhile, WD-40 is a worst solution possible. Contacts are self cleaning. Those with sufficient knowledge to answer your questions would have also noted why contact contamination does not exist. Is power supply a separate board? That would be unusual. Meanwhile, money spend on the power brick also would not be wasted had you used the meter and one minute to make those measurements. Just another exmaple of why fixing things only based in speculation is money wasted. |
#7
Posted to comp.sys.laptops,comp.sys.hp.hardware,uk.comp.sys.laptops,comp.sys.ibm.pc.hardware.misc,sci.electronics.repair
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Service manual to dismantle and replace power supply on HP Pavilion ZT3380
"w_tom" wrote in message ups.com... Is power supply a separate board? That would be unusual. Meanwhile, money spend on the power brick also would not be wasted had you used the meter and one minute to make those measurements. Just another exmaple of why fixing things only based in speculation is money wasted. Actually I am not the one who spent the money but the reason I posted was obvious: to find out (from someone who knows the way around the HP web site) where the service manual is. This will tell me how to establish whether the power supply is separate and/or how to get it out to replace it. Again, obviously, once inside I may well be able to figure out whether the contacts can be rendered more secure and the problem completely solved. Look at my carefully worded header. Without taking any voltage calibrations. (At the moment I don't even know how to crack open the case. And my suggestions as to what might be wrong with some carbon build-up on the connection was not designed to be taken seriously, else I would be able to see at least some pitting at least somewhere) |
#8
Posted to comp.sys.laptops,comp.sys.hp.hardware,uk.comp.sys.laptops,comp.sys.ibm.pc.hardware.misc,sci.electronics.repair
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Service manual to dismantle and replace power supply on HP Pavilion ZT3380
w_tom writes:
On Sep 3, 1:27 pm, "news.rcn.com" news.rnc.com wrote: If it IS just a contact problem, surely just spraying it with WD40 will make the problem completely go away for at least a while until the metal under the 'oil' starts encountering the carbon again? And for fear of repeating myself, why am I getting all these mysterious problems with the calibration utility if the problem is with the contacts? Contacts are self cleaning. That applies both to connectors and to contacts on battery. You are speculating what is a problem; then trying to fix based only on speculation. In but minutes with a meter you (or those who can provide better information) would know rather than just speculate. Everything posted is just speculation. Anyone with sufficient technical knowledge to provide a useful answer will post nothing - because no useful facts have been provided. For example, what is that battery voltage? Now we can say if the battery is charged. What is battery voltage when connected in system or voltage on connector to that battery; measured when AC power is applied and is disconnected. Why are you getting weird calibration problems? Nobody who could answer that question will even post because you don't provide numbers necessary to answer that question. First essential numbers are in the previous paragraph. Meanwhile, WD-40 is a worst solution possible. Contacts are self cleaning. Those with sufficient knowledge to answer your questions would have also noted why contact contamination does not exist. Is power supply a separate board? That would be unusual. Meanwhile, money spend on the power brick also would not be wasted had you used the meter and one minute to make those measurements. Just another exmaple of why fixing things only based in speculation is money wasted. Have you ever actually worked on a laptop computer? It's no where as simple as you make it out to be. --- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/ Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/ +Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm | Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html Important: Anything sent to the email address in the message header above is ignored unless my full name AND either lasers or electronics is included in the subject line. Or, you can contact me via the Feedback Form in the FAQs. |
#9
Posted to comp.sys.hp.hardware,uk.comp.sys.laptops,comp.sys.ibm.pc.hardware.misc,sci.electronics.repair,comp.sys.laptops
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Service manual to dismantle and replace power supply on HP Pavilion ZT3380
On Mon, 3 Sep 2007 23:33:43 UTC, Sam Goldwasser
wrote: w_tom writes: On Sep 3, 1:27 pm, "news.rcn.com" news.rnc.com wrote: If it IS just a contact problem, surely just spraying it with WD40 will make the problem completely go away for at least a while until the metal under the 'oil' starts encountering the carbon again? And for fear of repeating myself, why am I getting all these mysterious problems with the calibration utility if the problem is with the contacts? Contacts are self cleaning. That applies both to connectors and to contacts on battery. You are speculating what is a problem; then trying to fix based only on speculation. In but minutes with a meter you (or those who can provide better information) would know rather than just speculate. Everything posted is just speculation. Anyone with sufficient technical knowledge to provide a useful answer will post nothing - because no useful facts have been provided. For example, what is that battery voltage? Now we can say if the battery is charged. What is battery voltage when connected in system or voltage on connector to that battery; measured when AC power is applied and is disconnected. Why are you getting weird calibration problems? Nobody who could answer that question will even post because you don't provide numbers necessary to answer that question. First essential numbers are in the previous paragraph. Meanwhile, WD-40 is a worst solution possible. Contacts are self cleaning. Those with sufficient knowledge to answer your questions would have also noted why contact contamination does not exist. Is power supply a separate board? That would be unusual. Meanwhile, money spend on the power brick also would not be wasted had you used the meter and one minute to make those measurements. Just another exmaple of why fixing things only based in speculation is money wasted. Have you ever actually worked on a laptop computer? It's no where as simple as you make it out to be. --- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/ Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/ +Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm | Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html Important: Anything sent to the email address in the message header above is ignored unless my full name AND either lasers or electronics is included in the subject line. Or, you can contact me via the Feedback Form in the FAQs. You haven't come across w_tom before, then? Just don't mention lightning... -- Bob Eager begin 123 a new life...take up Extreme Ironing! |
#10
Posted to comp.sys.hp.hardware,uk.comp.sys.laptops,comp.sys.ibm.pc.hardware.misc,sci.electronics.repair,comp.sys.laptops
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but where DOES one find Service manuals for HP laptops please?
"Bob Eager" wrote in message ... On Mon, 3 Sep 2007 23:33:43 UTC, Sam Goldwasser wrote: You haven't come across w_tom before, then? Just don't mention lightning... That is what I sorta figured from his assertions that one has to do complex voltage measurements of minuscule internal parts (which you can only get at once you have cracked the case) in order for anyone to answer a question on where to find a service manual so that you can crack the case! Bob Eager begin 123 a new life...take up Extreme Ironing! |
#11
Posted to comp.sys.laptops,comp.sys.hp.hardware,sci.electronics.repair
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Service manual to dismantle and replace power supply on HP PavilionZT3380
news.rcn.com wrote:
Does anyone know how to replace a power supply in an HP Pavilion ZT3380 laptop please? The power plug seems to be exceptionally loose and if the computer shuts down, you can occasionally get it turned on again by turning the plug around in the socket 180 degrees so that something makes contact with something again. But I don't think this is the whole story. The computer does work as a desktop but once it did shut down overnight for no apparent reason and once during use while I was trying to soak-test it for this very problem. When it shut down overnight, by the morning, when I turned it on, the orange charge light having presumably been on all night, it showed 0% charge. Suspicious. More importantly it shuts down completely if you accidentally jiggle the plug, not going to battery power at all. In addition, when you start it with a largely dead battery and then try to plug it in to charge the battery, the battery doesn't charge at all. It CAN also show an orange charge light overnight when off and by the morning, show no increase in charge: This doesn't just seem to be a loose plug! I upgraded the BIOS and this seemed to improve things for a very short while, with the new BIOS having a battery calibration utility which worked once. However, now it wont even charge the System Battery except excruciatingly slowly. Isn't the system battery something like a rechargeable CR2025? Which should discharge/charge in a few minutes. When the battery utility did discharge/recharge the main battery, it did do it in around a half an hour. We HAVE tried changing the AC adapter in case the problem was with the internal wiring of the plug itself and isolated that as not being the issue. Someone once referred me to a service manual for my Pavilion 5415 which had a similar problem but I cant now find the reference to it (and replacing the power supply for the 5415 involved a completely uneconomical taking apart of the whole computer down virtually to the last screw!). These internal power supplies do occasionally come up on ebay and sell for a few bucks. possibly for this reason? Hopefully the situation wont be the same for the 3880? Though an alarming number of them seem to come up very cheaply at places like Fry's, - reconditioned . (Incidentally it refers to itself on its screen panel as a ZT3000, on its underside as a ZT3300 and on it serial number plate as a ZT3380US) The power jack on the notebook has separated from the mainboard. This is not unusual for HP notebooks. The jack simply cannot withstand the forces of insertion and removal of the AC power plug. If you are skilled with a soldering iron, there is a good chance that you can figure out a way to either re-solder the power jack to the mainboard, or solder a pigtail to the mainboard input power traces to move the AC adapter jack outside of the case. Otherwise, it is a mainboard (or sub-board for the jack) replacement, and good luck working with HP on that! Q |
#12
Posted to comp.sys.laptops,comp.sys.hp.hardware,sci.electronics.repair
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Service manual to dismantle and replace power supply on HP Pavilion ZT3380
"Quaoar" wrote in message
... news.rcn.com wrote: Does anyone know how to replace a power supply in an HP Pavilion ZT3380 laptop please? The power plug seems to be exceptionally loose and if the computer shuts down, you can occasionally get it turned on again by turning the plug around in the socket 180 degrees so that something makes contact with something again. But I don't think this is the whole story. The computer does work as a desktop but once it did shut down overnight for no apparent reason and once during use while I was trying to soak-test it for this very problem. When it shut down overnight, by the morning, when I turned it on, the orange charge light having presumably been on all night, it showed 0% charge. Suspicious. More importantly it shuts down completely if you accidentally jiggle the plug, not going to battery power at all. In addition, when you start it with a largely dead battery and then try to plug it in to charge the battery, the battery doesn't charge at all. It CAN also show an orange charge light overnight when off and by the morning, show no increase in charge: This doesn't just seem to be a loose plug! I upgraded the BIOS and this seemed to improve things for a very short while, with the new BIOS having a battery calibration utility which worked once. However, now it wont even charge the System Battery except excruciatingly slowly. Isn't the system battery something like a rechargeable CR2025? Which should discharge/charge in a few minutes. When the battery utility did discharge/recharge the main battery, it did do it in around a half an hour. We HAVE tried changing the AC adapter in case the problem was with the internal wiring of the plug itself and isolated that as not being the issue. Someone once referred me to a service manual for my Pavilion 5415 which had a similar problem but I cant now find the reference to it (and replacing the power supply for the 5415 involved a completely uneconomical taking apart of the whole computer down virtually to the last screw!). These internal power supplies do occasionally come up on ebay and sell for a few bucks. possibly for this reason? Hopefully the situation wont be the same for the 3880? Though an alarming number of them seem to come up very cheaply at places like Fry's, - reconditioned . (Incidentally it refers to itself on its screen panel as a ZT3000, on its underside as a ZT3300 and on it serial number plate as a ZT3380US) The power jack on the notebook has separated from the mainboard. This is not unusual for HP notebooks. The jack simply cannot withstand the forces of insertion and removal of the AC power plug. If you are skilled with a soldering iron, there is a good chance that you can figure out a way to either re-solder the power jack to the mainboard, or solder a pigtail to the mainboard input power traces to move the AC adapter jack outside of the case. Otherwise, it is a mainboard (or sub-board for the jack) replacement, and good luck working with HP on that! Q Had the same issue with a Compaq Laptop. |
#13
Posted to comp.sys.laptops,comp.sys.hp.hardware,uk.comp.sys.laptops,comp.sys.ibm.pc.hardware.misc,sci.electronics.repair
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Service manual to dismantle and replace power supply on HP Pavilion ZT3380
"news.rcn.com" news.rnc.com wrote in message ... Does anyone know how to replace a power supply in an HP Pavilion ZT3380 laptop please? The power plug seems to be exceptionally loose and if the computer shuts down, you can occasionally get it turned on again by turning the plug around in the socket 180 degrees so that something makes contact with something again. But I don't think this is the whole story. Someone once referred me to a service manual for my Pavilion 5415 which had a similar problem but I cant now find the reference to it (and replacing the power supply for the 5415 involved a completely uneconomical taking apart of the whole computer down virtually to the last screw!). These internal power supplies do occasionally come up on ebay and sell for a few bucks. possibly for this reason? Hopefully the situation wont be the same for the 3880? Though an alarming number of them seem to come up very cheaply at places like Fry's, - reconditioned . (Incidentally it refers to itself on its screen panel as a ZT3000, on its underside as a ZT3300 and on it serial number plate as a ZT3380US) Try eBay:- HP Pavilion ZT3000 service repair manual 0n CD US$9.99 Good luck! Colin |
#14
Posted to comp.sys.laptops,comp.sys.hp.hardware,sci.electronics.repair
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Service manual to dismantle and replace power supply on HP Pavilion ZT3380
"Quaoar" wrote in message ... news.rcn.com wrote: Does anyone know how to replace a power supply in an HP Pavilion ZT3380 laptop please? The power plug seems to be exceptionally loose and if the computer shuts down, you can occasionally get it turned on again by turning the plug around in the socket 180 degrees so that something makes contact with something again. But I don't think this is the whole story. The computer does work as a desktop but once it did shut down overnight for no apparent reason and once during use while I was trying to soak-test it for this very problem. When it shut down overnight, by the morning, when I turned it on, the orange charge light having presumably been on all night, it showed 0% charge. Suspicious. More importantly it shuts down completely if you accidentally jiggle the plug, not going to battery power at all. In addition, when you start it with a largely dead battery and then try to plug it in to charge the battery, the battery doesn't charge at all. It CAN also show an orange charge light overnight when off and by the morning, show no increase in charge: This doesn't just seem to be a loose plug! I upgraded the BIOS and this seemed to improve things for a very short while, with the new BIOS having a battery calibration utility which worked once. However, now it wont even charge the System Battery except excruciatingly slowly. Isn't the system battery something like a rechargeable CR2025? Which should discharge/charge in a few minutes. When the battery utility did discharge/recharge the main battery, it did do it in around a half an hour. We HAVE tried changing the AC adapter in case the problem was with the internal wiring of the plug itself and isolated that as not being the issue. Someone once referred me to a service manual for my Pavilion 5415 which had a similar problem but I cant now find the reference to it (and replacing the power supply for the 5415 involved a completely uneconomical taking apart of the whole computer down virtually to the last screw!). These internal power supplies do occasionally come up on ebay and sell for a few bucks. possibly for this reason? Hopefully the situation wont be the same for the 3880? Though an alarming number of them seem to come up very cheaply at places like Fry's, - reconditioned . (Incidentally it refers to itself on its screen panel as a ZT3000, on its underside as a ZT3300 and on it serial number plate as a ZT3380US) The power jack on the notebook has separated from the mainboard. This is pretty much exactly the symptom I am noticing: I just posted here to see if it was a common problem others had faced with this notebook; and if possible how others have dealt with it. This is not unusual for HP notebooks. Sine ci Posted, a friend has told me that he has exactly the same problem with a few HP notebooks he has!! The jack simply cannot withstand the forces of insertion and removal of the AC power plug. Arent they all made in the same Quanta factory in Taiwan? If you are skilled with a soldering iron, there is a good chance that you can figure out a way to either re-solder the power jack to the mainboard, or solder a pigtail to the mainboard input power traces to move the AC adapter jack outside of the case. Sorry to repeat myself or sound naive but how do you get to the mobo? Otherwise, it is a mainboard (or sub-board for the jack) replacement, and good luck working with HP on that! I had already spoken to them and they gave me a load of fluff lasting about 20 minnutes prior to telling me that the power supply is on the motherboard and replacement will cost four hundred bucks because they have put too weak a jack connector on their laptop. Is this why there are so many refurbished ones coming onto the market? Does Consumer Reports know about this problem and how HP both cant re-solder one connector to the motherboard and/or power supply AND treats their already-sold computers like mini-profit centres? Q |
#15
Posted to comp.sys.laptops,comp.sys.hp.hardware,uk.comp.sys.laptops,comp.sys.ibm.pc.hardware.misc,sci.electronics.repair
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Service manual to dismantle and replace power supply on HP Pavilion ZT3380
On Sep 3, 7:33 pm, Sam Goldwasser wrote:
Have you ever actually worked on a laptop computer? It's no where as simple as you make it out to be. I believe you are confusing w_tom with news.rcn.com. The latter is going to open a laptop, look at a power supply, and know whether that power supply is defective on sight. He is going to solder a loose connector but even declares voltage measurements with a meter as complex. He is even going to *fix* bad electrical contacts with WD-40. He wasted money replacing a power brick ony because he speculated it might be bad rather than do what a 12 year old even does - use the meter. The meter being so simple that it is even sold to K-mart shoppers. news.rcn.com does not even know how to open a laptop but somehow *knows* the meter is too complex. Meanwhile, if he had used the meter, then basic information on power supply operation, power connector, and battery state could have been learned without opening the laptop. Most interesting is the speculation. news.rcn.com has assumed the power supply will be on a separate board. I have yet to see that on any laptop. But then news.rcn.com is using speculated symptoms to know what is wrong. If news.rcn.com cannot use a simple meter, then he most certainly cannot use an iPod. Therefore he is the last person who should be opening a laptop. Appreciate why HP would fear letting too many have service manuals. Somehow news.rcn.com is going to look at a power supply board and visually know it is good or bad? Well had he taken a few voltage measurements without opening the laptop, then his replies here could have been far more useful. Currently every reply is only speculation. Even more absurd is that he will reflow solder on a connector - but fears the multimeter as too complex. He will fix a connector with WD-40. Others never questioned his technical grasp? |
#16
Posted to comp.sys.laptops,comp.sys.hp.hardware,uk.comp.sys.laptops,comp.sys.ibm.pc.hardware.misc,sci.electronics.repair
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Service manual to dismantle and replace power supply on HP Pavilion ZT3380
....snip...
Some PCs have non-rechargeable system button cells that can simply be replaced. Sounds like you have a bad NiCAD/NiH battery and bad connections. On my Compaq (aren't Compaq and HP the same these days?) the socket is notorious for coming completely loose from the motherboard resulting in the whole thing failing. My PC was dismantled carefully, the socket soldered back with some suitable copper wire where the MB contacts had failed and then the whole socket epoxied to the motherboard for further strenthening. Should it fail again, I'll never be able to repair it again but frankly I've repaired it once too many times for my liking already. Paul DS. |
#17
Posted to comp.sys.laptops,comp.sys.hp.hardware,uk.comp.sys.laptops,comp.sys.ibm.pc.hardware.misc,sci.electronics.repair
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Service manual to dismantle and replace power supply on HP Pavilion ZT3380
"Paul D.Smith" wrote in message .. . ...snip... Some PCs have non-rechargeable system button cells that can simply be replaced. Sounds like you have a bad NiCAD/NiH battery and bad connections. On my Compaq (aren't Compaq and HP the same these days?) the socket is notorious for coming completely loose from the motherboard resulting in the whole thing failing. My PC was dismantled carefully, the socket soldered back with some suitable copper wire where the MB contacts had failed and then the whole socket epoxied to the motherboard for further strenthening. Should it fail again, I'll never be able to repair it again but frankly I've repaired it once too many times for my liking already. I am in exactly the same position: We have established that the connector between the mobo and power socket does come loose on these HP laptops and then presumably the power in stops providing power to the rail comprising the CMOS battery charge circuit. There might well be nothing wrong with the (reasonably newish) CMOS battery. Since this time I have spoken to a friend in New York who reports that he had exactly the same problem with TWO of these computers bought for his kids! I dont think there can be much doubt any more about what is causing this, despite some responder's mention of the need to check voltage measurements before soldering back what everyone seems to agree is the broken connection. Where did you find someone to do the repair? Or if you did it, was the soldering a difficult one comprising lots of tiny connections? Paul DS. |
#18
Posted to comp.sys.laptops,comp.sys.hp.hardware,sci.electronics.repair
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Service manual to dismantle and replace power supply on HP Pavilion ZT3380
"Quaoar" wrote in message
... news.rcn.com wrote: Does anyone know how to replace a power supply in an HP Pavilion ZT3380 laptop please? The power plug seems to be exceptionally loose and if the computer shuts down, you can occasionally get it turned on again by turning the plug around in the socket 180 degrees so that something makes contact with something again. But I don't think this is the whole story. The computer does work as a desktop but once it did shut down overnight for no apparent reason and once during use while I was trying to soak-test it for this very problem. When it shut down overnight, by the morning, when I turned it on, the orange charge light having presumably been on all night, it showed 0% charge. Suspicious. More importantly it shuts down completely if you accidentally jiggle the plug, not going to battery power at all. In addition, when you start it with a largely dead battery and then try to plug it in to charge the battery, the battery doesn't charge at all. It CAN also show an orange charge light overnight when off and by the morning, show no increase in charge: This doesn't just seem to be a loose plug! I upgraded the BIOS and this seemed to improve things for a very short while, with the new BIOS having a battery calibration utility which worked once. However, now it wont even charge the System Battery except excruciatingly slowly. Isn't the system battery something like a rechargeable CR2025? Which should discharge/charge in a few minutes. When the battery utility did discharge/recharge the main battery, it did do it in around a half an hour. We HAVE tried changing the AC adapter in case the problem was with the internal wiring of the plug itself and isolated that as not being the issue. Someone once referred me to a service manual for my Pavilion 5415 which had a similar problem but I cant now find the reference to it (and replacing the power supply for the 5415 involved a completely uneconomical taking apart of the whole computer down virtually to the last screw!). These internal power supplies do occasionally come up on ebay and sell for a few bucks. possibly for this reason? Hopefully the situation wont be the same for the 3880? Though an alarming number of them seem to come up very cheaply at places like Fry's, - reconditioned . (Incidentally it refers to itself on its screen panel as a ZT3000, on its underside as a ZT3300 and on it serial number plate as a ZT3380US) The power jack on the notebook has separated from the mainboard. This is not unusual for HP notebooks. The jack simply cannot withstand the forces of insertion and removal of the AC power plug. If you are skilled with a soldering iron, there is a good chance that you can figure out a way to either re-solder the power jack to the mainboard, or solder a pigtail to the mainboard input power traces to move the AC adapter jack outside of the case. Otherwise, it is a mainboard (or sub-board for the jack) replacement, and good luck working with HP on that! Q Take a look at HP's customer service area, especially to http://search.hp.com/query.html?lang...e+manual&la=en A mfr will build several models from the same basic computer chassis, putting in a variety of features in an effort to extract more from your checking account. The same service manual can apply to several different models. Look at the list of manuals on that page and see if any fits your computer. You'll likely find that the DC coaxial power connector has broken from the mother board. The fix for this type of problem is usually limited to replacement of the connector. These connectors are usually priced from around $1 to $10 USD. The price of having a computer shop replace the connector can be in the neighborhood of $100 to $200 USD. That's because of the labor involved in disassembling the computer, replacing the connector, and then reassembling. The service manual will give you the disassembly and reassembly instructions, but if you don't have the necessary soldering equipment and skills, you can easily destroy the motherboard. The choice is yours... Cheers!!! -- Dave M MasonDG44 at comcast dot net (Just substitute the appropriate characters in the address) "In theory, there isn't any difference between theory and practice. In practice, there is." - Yogi Berra |
#19
Posted to comp.sys.laptops,comp.sys.hp.hardware,sci.electronics.repair
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Service manual to dismantle and replace power supply on HP Pavilion ZT3380
"DaveM" wrote in message ... "Quaoar" wrote in message ... news.rcn.com wrote: http://search.hp.com/query.html?lang...e+manual&la=en A mfr will build several models from the same basic computer chassis, putting in a variety of features in an effort to extract more from your checking account. The same service manual can apply to several different models. Look at the list of manuals on that page and see if any fits your computer. You'll likely find that the DC coaxial power connector has broken from the mother board. The fix for this type of problem is usually limited to replacement of the connector. These connectors are usually priced from around $1 to $10 USD. You are absolutely right and this is exactly what i have discovered: The centre pin in the female socket is very loose indeed. I am just wondering what I will find when I get in there to replace it. And is there a link anywhere to somewhere to buy a replacement? All the manuals which result from the page you reference look a bit like the notebook I have: I wonder how I establish which one is correct or are they basically probably all similar when they look similar? I wonder why the 3380 manual doesnt come up when one does the search you did, especially when the results page does indeed refer to the 3380! The price of having a computer shop replace the connector can be in the neighborhood of $100 to $200 USD. That's because of the labor involved in disassembling the computer, replacing the connector, and then reassembling. The service manual will give you the disassembly and reassembly instructions, but if you don't have the necessary soldering equipment and skills, you can easily destroy the motherboard. The choice is yours... Cheers!!! -- Dave M MasonDG44 at comcast dot net (Just substitute the appropriate characters in the address) "In theory, there isn't any difference between theory and practice. In practice, there is." - Yogi Berra |
#20
Posted to comp.sys.laptops,comp.sys.hp.hardware,uk.comp.sys.laptops,comp.sys.ibm.pc.hardware.misc,sci.electronics.repair
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Service manual to dismantle and replace power supply on HP Pavilion ZT3380
On Sep 3, 12:22 pm, "news.rcn.com" news.rnc.com wrote:
Does anyone know how to replace a power supply in an HP Pavilion ZT3380 laptop please? The power plug seems to be exceptionally loose and if the computer shuts down, you can occasionally get it turned on again by turning the plug around in the socket 180 degrees so that something makes contact with something again. But I don't think this is the whole story. The computer does work as a desktop but once it did shut down overnight for no apparent reason and once during use while I was trying to soak-test it for this very problem. When it shut down overnight, by the morning, when I turned it on, the orange charge light having presumably been on all night, it showed 0% charge. Suspicious. More importantly it shuts down completely if you accidentally jiggle the plug, not going to battery power at all. In addition, when you start it with a largely dead battery and then try to plug it in to charge the battery, the battery doesn't charge at all. It CAN also show an orange charge light overnight when off and by the morning, show no increase in charge: This doesn't just seem to be a loose plug! I upgraded the BIOS and this seemed to improve things for a very short while, with the new BIOS having a battery calibration utility which worked once. However, now it wont even charge the System Battery except excruciatingly slowly. Isn't the system battery something like a rechargeable CR2025? Which should discharge/charge in a few minutes. When the battery utility did discharge/recharge the main battery, it did do it in around a half an hour. We HAVE tried changing the AC adapter in case the problem was with the internal wiring of the plug itself and isolated that as not being the issue. Someone once referred me to a service manual for my Pavilion 5415 which had a similar problem but I cant now find the reference to it (and replacing the power supply for the 5415 involved a completely uneconomical taking apart of the whole computer down virtually to the last screw!). These internal power supplies do occasionally come up on ebay and sell for a few bucks. possibly for this reason? Hopefully the situation wont be the same for the 3880? Though an alarming number of them seem to come up very cheaply at places like Fry's, - reconditioned . (Incidentally it refers to itself on its screen panel as a ZT3000, on its underside as a ZT3300 and on it serial number plate as a ZT3380US) http://www.justmanuals.com |
#21
Posted to comp.sys.laptops,comp.sys.hp.hardware,uk.comp.sys.laptops,comp.sys.ibm.pc.hardware.misc,sci.electronics.repair
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Service manual to dismantle and replace power supply on HP Pavilion ZT3380
On Sep 3, 12:22 pm, "news.rcn.com" news.rnc.com wrote:
Does anyone know how to replace a power supply in an HP Pavilion ZT3380 laptop please? The power plug seems to be exceptionally loose and if the computer shuts down, you can occasionally get it turned on again by turning the plug around in the socket 180 degrees so that something makes contact with something again. But I don't think this is the whole story. The computer does work as a desktop but once it did shut down overnight for no apparent reason and once during use while I was trying to soak-test it for this very problem. When it shut down overnight, by the morning, when I turned it on, the orange charge light having presumably been on all night, it showed 0% charge. Suspicious. More importantly it shuts down completely if you accidentally jiggle the plug, not going to battery power at all. In addition, when you start it with a largely dead battery and then try to plug it in to charge the battery, the battery doesn't charge at all. It CAN also show an orange charge light overnight when off and by the morning, show no increase in charge: This doesn't just seem to be a loose plug! I upgraded the BIOS and this seemed to improve things for a very short while, with the new BIOS having a battery calibration utility which worked once. However, now it wont even charge the System Battery except excruciatingly slowly. Isn't the system battery something like a rechargeable CR2025? Which should discharge/charge in a few minutes. When the battery utility did discharge/recharge the main battery, it did do it in around a half an hour. We HAVE tried changing the AC adapter in case the problem was with the internal wiring of the plug itself and isolated that as not being the issue. Someone once referred me to a service manual for my Pavilion 5415 which had a similar problem but I cant now find the reference to it (and replacing the power supply for the 5415 involved a completely uneconomical taking apart of the whole computer down virtually to the last screw!). These internal power supplies do occasionally come up on ebay and sell for a few bucks. possibly for this reason? Hopefully the situation wont be the same for the 3880? Though an alarming number of them seem to come up very cheaply at places like Fry's, - reconditioned . (Incidentally it refers to itself on its screen panel as a ZT3000, on its underside as a ZT3300 and on it serial number plate as a ZT3380US) http://www.justmanuals.com |
#22
Posted to comp.sys.laptops,comp.sys.hp.hardware,sci.electronics.repair
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Service manual to dismantle and replace power supply on HP Pavilion ZT3380
"news.rcn.com" news.rnc.com wrote in message
... "DaveM" wrote in message ... "Quaoar" wrote in message ... news.rcn.com wrote: http://search.hp.com/query.html?lang...e+manual&la=en A mfr will build several models from the same basic computer chassis, putting in a variety of features in an effort to extract more from your checking account. The same service manual can apply to several different models. Look at the list of manuals on that page and see if any fits your computer. You'll likely find that the DC coaxial power connector has broken from the mother board. The fix for this type of problem is usually limited to replacement of the connector. These connectors are usually priced from around $1 to $10 USD. You are absolutely right and this is exactly what i have discovered: The centre pin in the female socket is very loose indeed. I am just wondering what I will find when I get in there to replace it. And is there a link anywhere to somewhere to buy a replacement? All the manuals which result from the page you reference look a bit like the notebook I have: I wonder how I establish which one is correct or are they basically probably all similar when they look similar? I wonder why the 3380 manual doesnt come up when one does the search you did, especially when the results page does indeed refer to the 3380! The price of having a computer shop replace the connector can be in the neighborhood of $100 to $200 USD. That's because of the labor involved in disassembling the computer, replacing the connector, and then reassembling. The service manual will give you the disassembly and reassembly instructions, but if you don't have the necessary soldering equipment and skills, you can easily destroy the motherboard. The choice is yours... Cheers!!! -- Dave M MasonDG44 at comcast dot net (Just substitute the appropriate characters in the address) "In theory, there isn't any difference between theory and practice. In practice, there is." - Yogi Berra http://www.dcpowerjacks.net/ is a good source for these connectors. Search for your model.. No minimum order... refreshing. -- Dave M MasonDG44 at comcast dot net (Just substitute the appropriate characters in the address) "In theory, there isn't any difference between theory and practice. In practice, there is." - Yogi Berra |
#23
Posted to comp.sys.laptops,comp.sys.hp.hardware,uk.comp.sys.laptops,comp.sys.ibm.pc.hardware.misc,sci.electronics.repair
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Service manual to dismantle and replace power supply on HP Pavilion ZT3380
On Sep 4, 1:18 pm, "news.rcn.com" news.rnc.com wrote:
I dont think there can be much doubt any more about what is causing this, despite some responder's mention of the need to check voltage measurements before soldering back what everyone seems to agree is the broken connection. Where did you find someone to do the repair? Or if you did it, was the soldering a difficult one comprising lots of tiny connections? Meter and two minutes would have identified a same broken solder joint that was not obviously broken - and maybe six other problems. There was no reason to believe you had a loose connector because it should have been that obvious and stated in your first post. Where do you find someone to solder a connector? Well, if that computer tech cannot use a meter, he most definitely cannot solder a connector safely; may even damage the motherboard or connector trying. You need someone with simplest electrical knowledge and soldering experience. Soldering is far more complex than a meter; could even cause motherboard damage. Everything posted says the connector is OK. If using speculation, the most likely problem is a broker solder joint; not a broken connector. Simply reflow solder in 30 seconds. Anyone who can solder should have no problem opening the laptop if done with care. Soldering can be accomplished in less than a minute. Learning how to open the laptop - maybe 30 or 45 minutes. Less time if using a shop manual. |
#24
Posted to comp.sys.laptops,comp.sys.hp.hardware,uk.comp.sys.laptops,comp.sys.ibm.pc.hardware.misc,sci.electronics.repair
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Service manual to dismantle and replace power supply on HP Pavilion ZT3380
In comp.sys.ibm.pc.hardware.misc w_tom wrote:
On Sep 3, 1:27 pm, "news.rcn.com" news.rnc.com wrote: If it IS just a contact problem, surely just spraying it with WD40 will make the problem completely go away for at least a while until the metal under the 'oil' starts encountering the carbon again? And for fear of repeating myself, why am I getting all these mysterious problems with the calibration utility if the problem is with the contacts? Contacts are self cleaning. That applies both to connectors and to contacts on battery. You are speculating what is a problem; then trying to fix based only on speculation. In but minutes with a meter you (or those who can provide better information) would know rather than just speculate. Everything posted is just speculation. Anyone with sufficient technical knowledge to provide a useful answer will post nothing - because no useful facts have been provided. For example, what is that battery voltage? Now we can say if the battery is charged. What is battery voltage when connected in system or voltage on connector to that battery; measured when AC power is applied and is disconnected. Why are you getting weird calibration problems? Nobody who could answer that question will even post because you don't provide numbers necessary to answer that question. First essential numbers are in the previous paragraph. Meanwhile, WD-40 is a worst solution possible. Contacts are self cleaning. Those with sufficient knowledge to answer your questions would have also noted why contact contamination does not exist. Is power supply a separate board? That would be unusual. Meanwhile, money spend on the power brick also would not be wasted had you used the meter and one minute to make those measurements. Just another exmaple of why fixing things only based in speculation is money wasted. That joker again. Goi away, you are a) not welcome b) not helping and c) do not have a clue. Arno |
#25
Posted to comp.sys.laptops,comp.sys.hp.hardware,uk.comp.sys.laptops,comp.sys.ibm.pc.hardware.misc,sci.electronics.repair
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Service manual to dismantle and replace power supply on HP PavilionZT3380
news.rcn.com wrote:
Does anyone know how to replace a power supply in an HP Pavilion ZT3380 laptop please? (Incidentally it refers to itself on its screen panel as a ZT3000, on its underside as a ZT3300 and on it serial number plate as a ZT3380US) HP Pavilion ZT3000 Series http://h10032.www1.hp.com/ctg/Manual/c00047479.pdf -- Adrian C |
#26
Posted to comp.sys.laptops,comp.sys.hp.hardware,uk.comp.sys.laptops,comp.sys.ibm.pc.hardware.misc,sci.electronics.repair
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Service manual to dismantle and replace power supply on HP Pavilion ZT3380
On Sep 4, 7:58 am, w_tom wrote:
On Sep 3, 7:33 pm, Sam Goldwasser wrote: Have you ever actually worked on a laptop computer? It's no where as simple as you make it out to be. I believe you are confusing w_tom with news.rcn.com. The latter is going to open a laptop, look at a power supply, and know whether that power supply is defective on sight. He is going to solder a loose connector but even declares voltage measurements with a meter as complex. He is even going to *fix* bad electrical contacts withWD-40. He wasted money replacing a power brick ony because he speculated it might be bad rather than do what a 12 year old even does - use the meter. The meter being so simple that it is even sold to K-mart shoppers. news.rcn.com does not even know how to open a laptop but somehow *knows* the meter is too complex. Meanwhile, if he had used the meter, then basic information on power supply operation, power connector, and battery state could have been learned without opening the laptop. Most interesting is the speculation. news.rcn.com has assumed the power supply will be on a separate board. I have yet to see that on any laptop. But then news.rcn.com is using speculated symptoms to know what is wrong. If news.rcn.com cannot use a simple meter, then he most certainly cannot use an iPod. Therefore he is the last person who should be opening a laptop. Appreciate why HP would fear letting too many have service manuals. Somehow news.rcn.com is going to look at a power supply board and visually know it is good or bad? Well had he taken a few voltage measurements without opening the laptop, then his replies here could have been far more useful. Currently every reply is only speculation. Even more absurd is that he will reflow solder on a connector - but fears the multimeter as too complex. He will fix a connector withWD-40. Others never questioned his technical grasp? Ouch, using WD-40 for electrical contacts - BAD. Will degrade plastics and make things worse in the long run. The only thing I use for electrical connections is DeoxIT. It not only deoxidizes oxidation, but actually improves the conductivity (not sure how, but it does). Works on ALL metal surfaces and is perfectly compatible with plastics. Here is the link: www.deoxit.com I use it on everything from light bulbs to computers to audio/video stuff. Mike |
#27
Posted to comp.sys.laptops,comp.sys.hp.hardware,uk.comp.sys.laptops,comp.sys.ibm.pc.hardware.misc,sci.electronics.repair
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Service manual to dismantle and replace power supply on HP Pavilion ZT3380
On Sep 5, 1:41 am, Arno Wagner wrote:
That joker again. Goi away, you are a) not welcome b) not helping and c) do not have a clue. And how many computers have you constructed by likely designing every connection and building it by soldering wires? Zero? Throught so. No wonder you offer nothing technically useful; use personal attacks to prove personal superiority. Clueless is the one who does not post technically; cannot challenge a post with a technical reply - Arno. |
#28
Posted to comp.sys.laptops,comp.sys.hp.hardware,uk.comp.sys.laptops,comp.sys.ibm.pc.hardware.misc,sci.electronics.repair
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Service manual to dismantle and replace power supply on HP Pavilion ZT3380
In comp.sys.ibm.pc.hardware.misc w_tom wrote:
On Sep 5, 1:41 am, Arno Wagner wrote: That joker again. Goi away, you are a) not welcome b) not helping and c) do not have a clue. And how many computers have you constructed by likely designing every connection and building it by soldering wires? Zero? Throught so. No wonder you offer nothing technically useful; use personal attacks to prove personal superiority. Clueless is the one who does not post technically; cannot challenge a post with a technical reply - Arno. You still owe me several technical replays in other threads. Oh, wait, they would have made you look like an utter incompetent, so you choose to ignore that part of the discussion. You can contribute nothing even marginally useful here. Go away. Arno |
#29
Posted to comp.sys.laptops,comp.sys.hp.hardware,uk.comp.sys.laptops,comp.sys.ibm.pc.hardware.misc,sci.electronics.repair
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Service manual to dismantle and replace power supply on HP Pavilion ZT3380
"Adrian C" wrote in message ... news.rcn.com wrote: Does anyone know how to replace a power supply in an HP Pavilion ZT3380 laptop please? (Incidentally it refers to itself on its screen panel as a ZT3000, on its underside as a ZT3300 and on it serial number plate as a ZT3380US) HP Pavilion ZT3000 Series http://h10032.www1.hp.com/ctg/Manual/c00047479.pdf Thanks Adrian, for some reason the manual section of the HP site for this unit seemed to point to various other computers. 5.3 is the important bit after you have passed the obvious bits: I suppose It will become apparent when you can desolder the power jack and put a new one one: (They dismantle the whole computer to get the mobo out) (What the others, - W_Tom, - possibly dont know is that I had reported that on further inspection, the centre pin is noticeably VERY loose. It might be a loost soldered joint at the base but surely much better to simply replace the whole connector?) -- Adrian C |
#30
Posted to comp.sys.laptops,comp.sys.hp.hardware,uk.comp.sys.laptops,comp.sys.ibm.pc.hardware.misc,sci.electronics.repair
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Service manual to dismantle and replace power supply on HP Pavilion ZT3380
"news.rcn.com" news.rnc.com wrote in message ... "Adrian C" wrote in message ... news.rcn.com wrote: Does anyone know how to replace a power supply in an HP Pavilion ZT3380 laptop please? (Incidentally it refers to itself on its screen panel as a ZT3000, on its underside as a ZT3300 and on it serial number plate as a ZT3380US) HP Pavilion ZT3000 Series http://h10032.www1.hp.com/ctg/Manual/c00047479.pdf Thanks Adrian, for some reason the manual section of the HP site for this unit seemed to point to various other computers. 5.3 is the important bit after you have passed the obvious bits: I suppose It will become apparent when you can desolder the power jack and put a new one one: (They dismantle the whole computer to get the mobo out) (What the others, - W_Tom, - possibly dont know is that I had reported that on further inspection, the centre pin is noticeably VERY loose. It might be a loost soldered joint at the base but surely much better to simply replace the whole connector?) -- Adrian C My experience with laptop power connectors is that one or more of the tabs that are soldered to the main board have broken. The center pin is usually swaged onto its tab. If the center pin is loose, then you might be able to solder it onto its tab, but it probably won't last very long, since solder is a very weak metal. You really need to replace the connector. -- Dave M MasonDG44 at comcast dot net (Just substitute the appropriate characters in the address) "In theory, there isn't any difference between theory and practice. In practice, there is." - Yogi Berra |
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Posted to comp.sys.laptops,comp.sys.hp.hardware,uk.comp.sys.laptops,comp.sys.ibm.pc.hardware.misc,sci.electronics.repair
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Service manual to dismantle and replace power supply on HP Pavilion ZT3380
"DaveM" wrote in message My experience with laptop power connectors is that one or more of the tabs that are soldered to the main board have broken. The center pin is usually swaged onto its tab. If the center pin is loose, then you might be able to solder it onto its tab, but it probably won't last very long, since solder is a very weak metal. You really need to replace the connector. Thank you for that input: This (along with the location of the manual) is exactly what I wanted to know. The logical thing to do when you know that a pin is so badly designed that it has started malfunctioning and you can see a loose pin is NOT to try to patch up the pin [as you correctly note], especially when the problem is so widedpread that there is a web site out there specifically set up to deal with this exact problem at perfectly reasonable expense! In the words of Yes Minister, when a fish starts to smell, you dont stand around enquiring which bit of the fish is smelling, (or for that matter taking intricate measurements of tiny interior bits you can see are at fault) you chuck it away. -- Dave M MasonDG44 at comcast dot net (Just substitute the appropriate characters in the address) "In theory, there isn't any difference between theory and practice. In practice, there is." - Yogi Berra |
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