ViewSonic monitor spasm

I have the model VG800 LCD and have looked for the schematic online, but have not found it yet. However, here is the problem. When I power it up, the green light lites, then an image flashes for a half second then disappears. The light remains on. It can be reset, and the process repeats itself. I tested the external power supply with a 5 amp load, and it manitains 12 volts. So I assume there must be a logic switch internally that trips off. Can anyone familiar with this model give me more specific ideas? Thank you.

Les

Reply to
les
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Most likely* bad caps or decoupling in the supply to the (backlight) inverter. Viewsonic's are plagued with this problem.

*YMMV
Reply to
D Yuniskis

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have similar problem only thing is that monitor shows screen after several
minutes.
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Reply to
SolarAngel

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