Hi ! I am repairing a Viewsonic VG191b LCD-monitor with disturbing thin short horisontal lines all over the screen. Is there anyone that has heard about this problem or has scematics on this monitor ?
Regards
Claudio
Check the electrolytic capacitors, some will be surface mount. Check them for high ESR. I've repaired a few LCD monitors with "noisy" pictures, many have high ESR replace the worst first, then check the picture quality. I didn't replace all the ones that were in the "questionable" area of the ESR meter, but replace all that were "bad" per the ESR meter.
What "ESR meter" did you use?
-- James T. White
Cap Wizard made by Independance Electronics (has analog meter with green / yellow / red (like old battery testers) for good / compare / bad). There were too many in the yellow zone to change, after replacing the ones in the red zone and testing the unit worked fine. It has been back in service for over a year now.
replacing
Thanks. Cap Wizard looks like a nice device.
-- James T. White
I have the Cap Wizard and the Dick Smith ESR Tester. I like the Dick Smith one best.
Clarence Southwest Monitors & Printers
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