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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
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benq monitor gets blurry after being stored for a long time
hello i have this new BENQ 17" monitor i wasn't using for a long time
so i covered it with the polyethene cover it came with after about six months i switched on the monitor and the pictures it produced were so blurred that i could hardly make out anything on the screen.If I switched it off for some time and put it back on it becomes a little less blurred and slowly worsens.Right now i dont know what to suspect because this is a new monitor i previously used for about two months and has no warranty covering it. |
#2
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benq monitor gets blurry after being stored for a long time
This could be from the HV multiplier starting to fail, or the CRT is going
weak. There are other less common things as well. This is very hard to determine without properly analysing the set. -- Jerry G. ===== "Edison O'billy" wrote in message om... hello i have this new BENQ 17" monitor i wasn't using for a long time so i covered it with the polyethene cover it came with after about six months i switched on the monitor and the pictures it produced were so blurred that i could hardly make out anything on the screen.If I switched it off for some time and put it back on it becomes a little less blurred and slowly worsens.Right now i dont know what to suspect because this is a new monitor i previously used for about two months and has no warranty covering it. |
#3
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benq monitor gets blurry after being stored for a long time
Hi!
While your monitor's problem could be due to an actual failure of something inside, it is very possible for a monitor's focus to drift over time. I recently fixed an HP Pavilion 17" monitor to "better than new" focus as per its owner by carefully adjusting the focus control on the flyback transformer. I've also done this to quite a few other monitors and for the ones that it has worked for, none have needed any other repair. However, before you do anything, be sure you are confident in your abilities and that you can be safe while you are doing this. Monitors contain high voltages that can cause painful injury or even death. This is true even when they are unplugged and left sitting around. They also contain AC-line connected parts which are very likely to cause death more than injury if accidently contacted. There is also the hazard of tube implosion if you scratch or impact the picture tube. Stay away from the wire coming out of the flyback, use ONLY a nonconductive tool for making any adjustments and do not wear jewelry, a watch or other conductive items that could dangle inside the monitor and give you a nasty surprise. Most importantly of all, if you do not feel comfortable working inside your monitor for any reason, don't do so. Refer it to a qualified shop or get another. It is not worth your life or well being for a monitor or any other device. So...if you have nothing to lose by trying, remove the cover from your monitor, locate the flyback (large, usually black, with a wire coming out and going to a sort of 'suction cup' on the CRT) and look for a FOCUS control. There may be two of them. Display something on the monitor and use a nonconductive tool to make adjustments. Watch the screen as you do. When you have the focus fixed, remove your tool, turn the monitor off, be sure it's unplugged and put it back together. William |
#4
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benq monitor gets blurry after being stored for a long time
"William R. Walsh" m wrote in message news:cRurc.36068$gr.3587897@attbi_s52...
Hi! While your monitor's problem could be due to an actual failure of something inside, it is very possible for a monitor's focus to drift over time. I recently fixed an HP Pavilion 17" monitor to "better than new" focus as per its owner by carefully adjusting the focus control on the flyback transformer. I've also done this to quite a few other monitors and for the ones that it has worked for, none have needed any other repair. However, before you do anything, be sure you are confident in your abilities and that you can be safe while you are doing this. Monitors contain high voltages that can cause painful injury or even death. This is true even when they are unplugged and left sitting around. They also contain AC-line connected parts which are very likely to cause death more than injury if accidently contacted. There is also the hazard of tube implosion if you scratch or impact the picture tube. Stay away from the wire coming out of the flyback, use ONLY a nonconductive tool for making any adjustments and do not wear jewelry, a watch or other conductive items that could dangle inside the monitor and give you a nasty surprise. Most importantly of all, if you do not feel comfortable working inside your monitor for any reason, don't do so. Refer it to a qualified shop or get another. It is not worth your life or well being for a monitor or any other device. So...if you have nothing to lose by trying, remove the cover from your monitor, locate the flyback (large, usually black, with a wire coming out and going to a sort of 'suction cup' on the CRT) and look for a FOCUS control. There may be two of them. Display something on the monitor and use a nonconductive tool to make adjustments. Watch the screen as you do. When you have the focus fixed, remove your tool, turn the monitor off, be sure it's unplugged and put it back together. William With new monitors being available now almost dirt cheap (I bought an HP MX70 17" flat screen monitor about a year ago at Best Buy for $80 or so after a factory rebate), I don't see the sense in poking around in a defective one. I had a monitor on my computer that first looked like it had power supply trouble (bends in the raster, etc.)and deflection problems (it eventually started showing a thin white vertical line on the screen), then the thing eventually went completely dead. I didn't mess with it. (Power supply probably quit.) The monitor went out on a Saturday night; the next day I went to the local Best Buy and purchased the MX70 monitor I have now. Dirt cheap, as I said, and I was able to get my computer back online in a matter of a few hours with no poking around inside the old monitor. I worked with TVs for years before getting into computers in 1992, so I am well aware of the high-voltage shock hazard. However, again, I do not feel that any computer monitor out of warranty is worth attempting a repair of any kind. I would suggest that you ditch the old monitor and get a new one. Today's flat-screen CRT monitors are great (I really like the sharp display and onscreen controls on my HP MX70); they are dirt cheap and really easy to find, as they are being phased out to make room for the new flat-panel monitors by Viewsonic, MAG Innovision (is this company any relation to today's Philips Magnavox?) and others. I saw an ad in a flyer in my Sunday newspaper which showed an emachines 17" monitor for a final price of just under $100, after instant savings and a $100 mail-in rebate. If you want to spend $200+ for a fancy flat-panel monitor you can, of course, but as cheap as the CRT types are now, I'd grab one before they are gone. CRT monitors are all I've used with every computer I've ever owned, and I've been pleased with the color rendition, image quality, etc. of the monitors I have used with the two Windows computers I've owned over the last seven years (an 8mb, 166 MHz Win95 system to start with in 1997, followed by my present installation, an IBM Aptiva 595 128mb, 600-MHz minitower running Win98SE). Kind regards, Jeff, WB8NHV (mailto: ) Fairport Harbor, Ohio USA |
#5
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benq monitor gets blurry after being stored for a long time
Jeff ) showed us the following results:
With new monitors being available now almost dirt cheap (I bought an HP MX70 17" flat screen monitor about a year ago at Best Buy for $80 or so after a factory rebate), I don't see the sense in poking around in a defective one. Sometimes I think it is good to try repairing old defective monitor because you can use it to try and learn more. If you break it even more you don't lose anything. If you fix it you have a spare monitor. []s -- © 2004 Chaos Master | "I'm going under, Posting from Brazil! | drowning in you Win 98 + LiteStep | I'm falling forever, Slackware Linux 9.1 | I've got to break through" ---------------------. -- Evanescence, "Going Under" |
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