Question about ViewSonic VA720 17" LCD Flat Panel Monitor
When I turn the monitor on I get a brief visual of the desktop then it goes black.
The most common problem. It is related to old backlight lamps. The best solution is to replace them, but if you don't care a lot about total brightness, you may simply replace faulty lamp with 27pF 3kV capacitor, soldered across the high-voltage connector. That would be equivalent load for the inverter.
First of all, you need to find which lamp causes that problem. Disconnect flat cable from the display so all backlight will go through the screen. Now, using that 27pF capacitor replace lamps one by one and check when the light will stay for longer time. Keep that configuration as temporary solution, but make sure you will isolate your capacitor well, 'cause there's about 1000 volts applied to it.
Posted on Sep 13, 2009
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Posted on Jan 02, 2017
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