Question about ViewSonic VA902b 19" Monitor

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Screen won't stay on

I turn on my computer and monitor but the monitor only comes on for a second, the green on lite stays lite but nothing on the screen ? bad capacitor maybe?

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  • Anonymous Apr 02, 2008

    Hi, I have 2 ViewSonic VA902b monitors that have the same problem. When you turn them on the video on the screen will flash on for a moment. Could It be the backlight? The were only manfactured in Mar 06 so they may still be in warranty. What do you think? Give me the technical explaination, I used to repair consumer electronics. Thanks, Bob

  • navarac Sep 11, 2008

    Has anyone gotten a resolution to this issue. I have 4 VA902b monitors that are doing the same thing.

  • Anonymous Nov 02, 2008

    Nothing visibly wrong inside, but same problem here.

  • mclambert Nov 09, 2008

    Same problem... flashes on for a second the blank. Computer still recognizes monitor attached.

  • Anonymous Feb 08, 2009

    Likewise: Boot, monitor flickers, blank screen.

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This is a common problem with LCD monitors after a few years of use. The capacitors in the power supply board start to fail and this prevents the monitor from starting up correctly. Sometimes you get a picture and then it goes black. On some units you can keep pressing the power button and after several power up cycles the monitor will work until you turn if off. These symptoms are all common with capacitor failure. The monitors are well out of warranty now so Viewsonic will not cover the repair cost. But the repair is very easy to do yourself. You just have to replace the 6 power filter capacitors on the power supply board. Here is a link to additional information on this repair.

http://www.ccl-la.com/catalog/product_info.php?cPath=21_34&products_id=218

I hope this helps, I have repaired over 30 of this model with the same issue.

Posted on Jun 21, 2012

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How do you fix the backlight inverter?

Posted on Nov 13, 2008

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Hi...Guys,

Yeah...you're right! your backlight inverter are burnt out. Most likely due to over heating capacitors.
Good lucks!

Posted on Sep 21, 2008

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I had the same problem and called Viewsonic (www.viewsonic.com). Bought mine in July '06 and to my surprise it's still under warranty. The warranty goes for 3 years so even though shipping is my cost, they'll fix or replace it with a same/similar model.

Posted on Jan 05, 2009

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I had a chat session with Viewsonic and they agreed to fix all 4 of mine under warranty. No real hesitation on their part - maybe it's a known problem.

Posted on Sep 22, 2008

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Posted on Jan 02, 2017

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The problem on your monitor is a bad power supply. We you can solder you should be able to repair it. If you check our site at :
www.ccl-la.com/badcaps.htm We have a monitor repair section with dis-assembly guides and repair procedures. I will post a Hanns-g guide tonight. This will show how to open and repair the monitor. We also have a repair parts kit available. If you don't want to do the repair yourself then we can do it for you, just email me if you have questions or wan tus to do the repair for ou.

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