Question about ViewSonic Graphic VG2021m LCD Monitor

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No Back light

Replaced C204 and CE101 They were bulged and leaking

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Did you replace all the caps in the secondary DC side with low ESR caps such as PANASONIC FM or FC series from DIGIKEY? The fuse next to the cap is OK?

Posted on Jun 06, 2010


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What part needs to be replaced when the monitor switches off after being turned on?

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Acer screen is completely black

There are more than one version of this model.

You need to look for bad caps with bulging/leaking tops, blown fuses, shorted MOSFET, etc.

Please read my guide to understand more:

Basic LCD monitor and TV troubleshooting guide:
Failed TV and Monitors pictures:

Learn about bad caps:

Capacitors kit: he can make you a set of caps for you.
Or just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.

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1 Answer

The tv goes to turn on then the green light come up then flashes then the red light comes on then the green agin it does this a few time then turns off at no time is there a picture or sound. thanks

Probably some bad capacitors in the power supply or inverter/RF circuitry for the back-lights.
look for electrolytics with the top bubbled up on them, or bulging plug at the bottom or leaking electrolyte...these caps all need to be replaced.

Feb 28, 2011 | LG 50PG20 50 in. Plasma HDTV

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View sonic lcd power problem

Check the DC filter caps first.
If you are going to DIY and have proper tools and know safety precaution then please read on:
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, blown fuses; poor solder joints, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed monitors to get some ideas what to look for:
Post back what you see inside so we can guide you further and it will help out other people in the future also.
Capacitors kit:

Aug 03, 2010 | ViewSonic VA1912wb Monitor

1 Answer

I plugged in my toshiba DLP projector one day and I heard a pop

Sounds like a blown capacitor...they age...leak..and bulge..
and then blow out...
Check (visually) all the capacitors on your power supply board...
if they are fat, bulging or leaking...they should be replaced.

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I pushed the button next to the power button now i have no screen, i pu7shed the button again but to no avail, please help

Common failure is the caps in the inverter/power board, look for caps with bulging tops, see example of failed VIEWSONIC monitor due to bad caps:

Feb 23, 2010 | ViewSonic VA1912wb Monitor

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Hello only on screen

On the power supply board I replaced CAP C226 as per another poster and the problem is solved. It is a 470 uF, 35 VDC capacitor. Bought one at Radio Shack for <$1.50 USD. Radio Shack part number is: 272.1030.

Jul 19, 2009 | RCA DRC8335

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