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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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How to identify component on Dell Inspiron 5100 motherboard?
Short Story
I'm trying to fix a Dell Inspiron 5100 motherboard. I believe that there is a chip/component that was damaged. The package is damaged, so I can't read all the codes. I have photos of the partial code and location of the component: http://5100.iut.us Long Story My wife plugged a old Compaq power supply into her Dell Insipron 5100 (insert square peg in a round hole joke here) by accident. She noticed a burning smell and unplugged it right away. The laptop still worked running off the battery but would not work with only the AC adaptor or with a dead battery and it won't charge the battery anymore. Dell wants $399 for a new motherboard and I have to install it myself or hire someone. I figure I can't loose much trying to fix it or jerry-rig an AC adaptor to work through the batter connector. I took the motherboard out and noticed that there is small chip-like component that looks fried. I can't make out all the codes on it so I am trying to figure out what the part codes are so I can try and order a new one and solder it on. I have some photos on my web site of the component and it's position on the motherboard. If anyone can identify the part or has any ideas on how I can get more information to identify it myself, please let me know. Photos: http://5100.iut.us -Mike |
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I havent particularly worked on an inspiron motherboard, but I have repaired
several dead motherboards in the lattitude series. One thing I can tell you, it IS a power transistor in an IC package. either an NPN or a PNP type. chances are, when you test that transistor with a diode check of a DMM, youll prolly get a short between all the pins, in which case the light will immidiatly go out when you plug in the power adapter. Anyway, the chip is most likely a regulator transistor. im not sure which type, its either an NPN or a PNP. it could also be a voltage regulator IC, but i doubt it. Your best bet is to find another inspiron motherboard with a different problem from ebay, and pulling the chip off of that board. like I did with lattitude cpi's. numbers arnt going to help you, as its most likely a factory code. "Mike" wrote in message oups.com... Short Story I'm trying to fix a Dell Inspiron 5100 motherboard. I believe that there is a chip/component that was damaged. The package is damaged, so I can't read all the codes. I have photos of the partial code and location of the component: http://5100.iut.us Long Story My wife plugged a old Compaq power supply into her Dell Insipron 5100 (insert square peg in a round hole joke here) by accident. She noticed a burning smell and unplugged it right away. The laptop still worked running off the battery but would not work with only the AC adaptor or with a dead battery and it won't charge the battery anymore. Dell wants $399 for a new motherboard and I have to install it myself or hire someone. I figure I can't loose much trying to fix it or jerry-rig an AC adaptor to work through the batter connector. I took the motherboard out and noticed that there is small chip-like component that looks fried. I can't make out all the codes on it so I am trying to figure out what the part codes are so I can try and order a new one and solder it on. I have some photos on my web site of the component and it's position on the motherboard. If anyone can identify the part or has any ideas on how I can get more information to identify it myself, please let me know. Photos: http://5100.iut.us -Mike |
#3
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only thing I can make out, it looks to be a LM393, which is a dual
comparator. oops. I was talking about that chip down to the left corner, which is a transistor. "Mike" wrote in message ... I havent particularly worked on an inspiron motherboard, but I have repaired several dead motherboards in the lattitude series. One thing I can tell you, it IS a power transistor in an IC package. either an NPN or a PNP type. chances are, when you test that transistor with a diode check of a DMM, youll prolly get a short between all the pins, in which case the light will immidiatly go out when you plug in the power adapter. Anyway, the chip is most likely a regulator transistor. im not sure which type, its either an NPN or a PNP. it could also be a voltage regulator IC, but i doubt it. Your best bet is to find another inspiron motherboard with a different problem from ebay, and pulling the chip off of that board. like I did with lattitude cpi's. numbers arnt going to help you, as its most likely a factory code. "Mike" wrote in message oups.com... Short Story I'm trying to fix a Dell Inspiron 5100 motherboard. I believe that there is a chip/component that was damaged. The package is damaged, so I can't read all the codes. I have photos of the partial code and location of the component: http://5100.iut.us Long Story My wife plugged a old Compaq power supply into her Dell Insipron 5100 (insert square peg in a round hole joke here) by accident. She noticed a burning smell and unplugged it right away. The laptop still worked running off the battery but would not work with only the AC adaptor or with a dead battery and it won't charge the battery anymore. Dell wants $399 for a new motherboard and I have to install it myself or hire someone. I figure I can't loose much trying to fix it or jerry-rig an AC adaptor to work through the batter connector. I took the motherboard out and noticed that there is small chip-like component that looks fried. I can't make out all the codes on it so I am trying to figure out what the part codes are so I can try and order a new one and solder it on. I have some photos on my web site of the component and it's position on the motherboard. If anyone can identify the part or has any ideas on how I can get more information to identify it myself, please let me know. Photos: http://5100.iut.us -Mike |
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