Viewsonic VA550 15" Flat LCD - won't turn on

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  • meixeira
    New Member
    • Mar 2010
    • 2

    #1

    Viewsonic VA550 15" Flat LCD - won't turn on

    Hello everyone,

    I was all of a sudden irritated yesterday when I remembered that we have an LCD monitor that had failed some for unknown reason and that at the same time we can't bear to have it sent off to landfill or some e-waste distopia. I resolved that I would much rather repair it and learn a new hobby in the process. At the moment, I have a beginner understanding of circuitry, componentry, and saudering, but I'm keen on learning if I can get this thing working. Though, the question remains whether it is a lost cause... I hope someone might wish to provide insight.

    The current situation is that the monitor will not turn on. The AC adaptor green light is on, as is the green light on the logic board. By my view, all the capacitators are their normal shape, no bloating, leaking, or off-colored logic board. Before failure, there was occasional distorted image in the form streaking lines.

    This probably involves much more than I know. I guess what I'm hoping for is that someone has experienced the exact same thing, and might suggest next steps, or whether it should even be attempted by a beginner. I spent some time on the forum looking for similar cases, but they typically involved visually obvious failed caps.
  • duceolsen
    Member
    • Mar 2010
    • 19

    #2
    Re: Viewsonic VA550 15" Flat LCD - won't turn on

    Please post images of the front and rear of the boards in your monitor.
    What are the voltages you are getting from the power board?

    Comment

    • meixeira
      New Member
      • Mar 2010
      • 2

      #3
      Re: Viewsonic VA550 15" Flat LCD - won't turn on

      I hope these give some idea. I don't have a multimeter at the moment, though anyhow I wouldn't know where exactly to place the probes. I've read an introductory voltage measuring guide, but its still not exactly clear. Its dawning on me that electronics isn't something you can just delve into lightly...
      I've checked out the thread regarding Online Electronics Training, great place to start, I suppose
      Attached Files

      Comment

      • duceolsen
        Member
        • Mar 2010
        • 19

        #4
        Re: Viewsonic VA550 15" Flat LCD - won't turn on

        This monitor takes a powerbrick right? When you get a multimeter measure the voltages and compare them to what is stated as output on the brick.

        Try using a flashlight to the screen while connected to the computer and see if there is an image produced and no backlight.

        Also this doesn't look so good or was it burned like that when assembled?
        Attached Files

        Comment

        • smason
          Badcaps Legend
          • Feb 2010
          • 1652
          • Canada

          #5
          Re: Viewsonic VA550 15" Flat LCD - won't turn on

          That looks like a normal soldered ground/hold down on a crystal to me. They probably just didn't flux remove on it.
          36 Monitors, 3 TVs, 4 Laptops, 1 motherboard, 1 Printer, 1 iMac, 2 hard drive docks and one IP Phone repaired so far....

          Comment

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