ViewSonic monitor spasm
in [Repair]
|
Prev: tektronix D755 CRT problem?
Next: FA: NEW Amana / Maytag part number 59001626 commercial microwave oven high voltage transformer
From: les on 8 Sep 2009 14:46 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
From: D Yuniskis on 9 Sep 2009 01:01
les wrote: > 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? Most likely* bad caps or decoupling in the supply to the (backlight) inverter. Viewsonic's are plagued with this problem. *YMMV |