Question about ViewSonic VG900b (Black) (10 Pack) Monitor

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Viewsonic VG 900 displays briefly, then goes blank

Exactly what was said in the subject. The monitor turns on, shows the image for a few seconds, then goes black. Testing with another monitor, the problem is not in my video card or cable. Thanks for any help you can provide.

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  • Hoovooloo Oct 12, 2008

    Thank you both for your comments. To answer jjcf89, it happens every time I turn it on (thought the time it is displaying something seems to vary a bit), the monitor has worked before, and I got it from a friend after it broke so I don't know how old it is of how it broke. To bammbammfran, I currently have it taken apart, and have a DC tester. Where should I check/what are good values? Again, thank you.

  • Jonathan May 11, 2010

    Does this happen every time you turn the monitor on? For example, you turn the monitor on and you see your desktop for about 3 seconds then it just goes blank. You turn the monitor off and back on and it repeats. Has the monitor ever worked before? Is it brand new or have you had it for a while?

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What Usually causes these to go on and off quickly is one af a couple things.

Usually it is the powerboard not putting out enough power to run the video board and the inverter.

Sometimes it is the actual inverter board. I have seen a plain small fuse stop these cold.

Rarely, but it could be a bad bulb in the screen. Bad bulbs usually start dark in the middle, or they start off pink. They can also flicker while they are on.

If you can take it apart and have a dc tester, the problem may be able to be found.
I repair some viewsonics , mostly VXs series, but I have done a couple of these.

bammbammfran

Posted on Oct 11, 2008

  • Fran Bednar
    Fran Bednar Oct 12, 2008

    Can you get me a picture of your board since it is apart.

    IF not, Do any of the canister looking components(capacitors) look bulged at the tops.

    One place that you can check for dc voltage is at these canisters (the
    side of the canister that has the stripe is the negative side- It may
    also be marked on the board right where they mount)

    Fran



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