Question about ViewSonic VX924 19" LCD Monitor
I have a KDS Model 700P, Product # K717S which is about 1 year old. It works fine sometimes for hours and other times the screen will look a little dark and then go blank after just a few seconds. Shutting off and then on again makes it work for about 1 second before going blank again.
mine is on for a sec, then goes black. I turn the power off and back on,,, the screen apears then goes black again.
Two possible causes are bad capacitors or a bad light inside the LCD panel.
Open the unit and check to see if any of the capacitors in the power supplyor other boards look domed or vented on the top.
Replace any capacitors accordingly. Monitor should work fine after that.
If not try checking the surface-mount transistors on the inverter board that run the lights. Some times these transistora go bad. Also, you may have a bad light inside the panel. This is tough to test without a spare light to use for troubleshooting the panel lights.
You can take the panel apart and inspect the lamps but it is very tedious. It's tough enough to get them apart and back together again never mind keeping the layers clean. You have to try not to get any dust between the layers or you will see it in the picture.
There's usually two light fixtures each of which holds two lamps. One fixture at the top and one at the bottom. Remove them one at a time and inspect the lamps to see if any are broken or very dark on the ends. If one looks out of place, it could be bad.
You'll have to find replacement lights on the net. It's not easy to replace them, but if you've gone this far, good luck. You should be able to get generic instructions off of the site that sells the lamps.
Posted on Feb 14, 2008
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Posted on Jan 02, 2017
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