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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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Viewsonic G810 intermittently zigs and zags, looks like vertical oscilloscope
My Viewsonic G810 has zigzagging of the horizontal lines occurring.
Sometimes the view has a watery look to it at times. When very bad, any vertical line in the display looks a bit like an oscilloscope trace of sound going down the line. This has been happening randomly. Actually, it had disappeared for a good while. It came back today with a vengeance. When bad, the screen shrinks from the sides a bit, not from the top or bottom. It is worse when first turned on or the monitor comes out being turned off by the computer. I see this distortion showing up if I turn on the monitor without turning on the computer. I tried blowing out the dust without taking off the cover. Any ideas? Thanks, Jeff |
#2
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Viewsonic G810 intermittently zigs and zags, looks like vertical oscilloscope
It looks like there are a number of electrolytic caps in the various areas
of the power supply and scan amplifiers that are warn down. These can be checked with an ESR meter. Once found, the defective caps can be easily replaced. If you are not experienced in monitor service, I would suggest taking the monitor in to a service centre to do this type of work for you. -- Greetings, Jerry Greenberg GLG Technologies GLG ========================================= WebPage http://www.zoom-one.com Electronics http://www.zoom-one.com/electron.htm ========================================= "Jeff Finnan" wrote in message m... My Viewsonic G810 has zigzagging of the horizontal lines occurring. Sometimes the view has a watery look to it at times. When very bad, any vertical line in the display looks a bit like an oscilloscope trace of sound going down the line. This has been happening randomly. Actually, it had disappeared for a good while. It came back today with a vengeance. When bad, the screen shrinks from the sides a bit, not from the top or bottom. It is worse when first turned on or the monitor comes out being turned off by the computer. I see this distortion showing up if I turn on the monitor without turning on the computer. I tried blowing out the dust without taking off the cover. Any ideas? Thanks, Jeff |
#3
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Viewsonic G810 intermittently zigs and zags, looks like vertical oscilloscope
It looks like there are a number of electrolytic caps in the various areas
of the power supply and scan amplifiers that are warn down. These can be checked with an ESR meter. Once found, the defective caps can be easily replaced. If you are not experienced in monitor service, I would suggest taking the monitor in to a service centre to do this type of work for you. -- Greetings, Jerry Greenberg GLG Technologies GLG ========================================= WebPage http://www.zoom-one.com Electronics http://www.zoom-one.com/electron.htm ========================================= "Jeff Finnan" wrote in message m... My Viewsonic G810 has zigzagging of the horizontal lines occurring. Sometimes the view has a watery look to it at times. When very bad, any vertical line in the display looks a bit like an oscilloscope trace of sound going down the line. This has been happening randomly. Actually, it had disappeared for a good while. It came back today with a vengeance. When bad, the screen shrinks from the sides a bit, not from the top or bottom. It is worse when first turned on or the monitor comes out being turned off by the computer. I see this distortion showing up if I turn on the monitor without turning on the computer. I tried blowing out the dust without taking off the cover. Any ideas? Thanks, Jeff |
#4
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Viewsonic G810 intermittently zigs and zags, looks like vertical oscilloscope
HV arcing inside the flyback, common before total flyback failure.
David "Jeff Finnan" wrote in message m... My Viewsonic G810 has zigzagging of the horizontal lines occurring. Sometimes the view has a watery look to it at times. When very bad, any vertical line in the display looks a bit like an oscilloscope trace of sound going down the line. This has been happening randomly. Actually, it had disappeared for a good while. It came back today with a vengeance. When bad, the screen shrinks from the sides a bit, not from the top or bottom. It is worse when first turned on or the monitor comes out being turned off by the computer. I see this distortion showing up if I turn on the monitor without turning on the computer. I tried blowing out the dust without taking off the cover. Any ideas? Thanks, Jeff |
#5
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Viewsonic G810 intermittently zigs and zags, looks like vertical oscilloscope
HV arcing inside the flyback, common before total flyback failure.
David "Jeff Finnan" wrote in message m... My Viewsonic G810 has zigzagging of the horizontal lines occurring. Sometimes the view has a watery look to it at times. When very bad, any vertical line in the display looks a bit like an oscilloscope trace of sound going down the line. This has been happening randomly. Actually, it had disappeared for a good while. It came back today with a vengeance. When bad, the screen shrinks from the sides a bit, not from the top or bottom. It is worse when first turned on or the monitor comes out being turned off by the computer. I see this distortion showing up if I turn on the monitor without turning on the computer. I tried blowing out the dust without taking off the cover. Any ideas? Thanks, Jeff |
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