BenQ DV3250 - operates but with bizzare display corruption

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  • BarrelRoll
    Member
    • Jan 2011
    • 34

    #1

    BenQ DV3250 - operates but with bizzare display corruption

    I recently acquired a not quite properly working BenQ DV3250. I suspect this is a defective AV board issue, but I don't know for sure. The AV board is a BQ102 part number 48.M3401.A00 which is basically unobtanium unless you can read and write Taiwanese. All the voltages look good from the PS so I guess I'd like to try and figure out if this is fixable and if this type of display corruption is indicative of a failing AV card or if it's the panel itself. I suspect this will just be an academic exercise as neither are likely to be available anywhere for a reasonable cost.

    The gist of it is that the right half of the screen appears to be fine, but on a black screen there are two vertical blue bars, that appear to be some kind of inverted color issue with duplicated color corruption from the right half of the screen to the left. Like maybe when the screen should be no blue it's full blue, and when it's supposed to be full blue it's no blue?
    Attached Files
  • Village Electronics
    OldPro
    • Apr 2011
    • 118

    #2
    Re: BenQ DV3250 - operates but with bizzare display corruption

    Originally posted by BarrelRoll
    I recently acquired a not quite properly working BenQ DV3250. I suspect this is a defective AV board issue, but I don't know for sure. The AV board is a BQ102 part number 48.M3401.A00 which is basically unobtanium unless you can read and write Taiwanese. All the voltages look good from the PS so I guess I'd like to try and figure out if this is fixable and if this type of display corruption is indicative of a failing AV card or if it's the panel itself. I suspect this will just be an academic exercise as neither are likely to be available anywhere for a reasonable cost.

    The gist of it is that the right half of the screen appears to be fine, but on a black screen there are two vertical blue bars, that appear to be some kind of inverted color issue with duplicated color corruption from the right half of the screen to the left. Like maybe when the screen should be no blue it's full blue, and when it's supposed to be full blue it's no blue?
    Panel

    Comment

    • BarrelRoll
      Member
      • Jan 2011
      • 34

      #3
      Re: BenQ DV3250 - operates but with bizzare display corruption

      Just for kicks I took the panel a little more apart and snapped a few pictures. The problem definitely starts right between the two cards screwed to the top of the panel. No signs of broken solder joints or bad flex circuitry. There looks to be some type of IC actually mounted to the middle of the flex cables that attach to the panel. Some kind of buffer circuit? Doesn't appear to be any physical damage to the panel.
      Attached Files

      Comment

      • Longbow
        Badcaps Veteran
        • Jun 2011
        • 623
        • USA

        #4
        Re: BenQ DV3250 - operates but with bizzare display corruption

        Bad panel.
        Is it plugged in?

        Comment

        • BarrelRoll
          Member
          • Jan 2011
          • 34

          #5
          Re: BenQ DV3250 - operates but with bizzare display corruption

          There wasn't anything wrong with the panel. Replaced the TCON board and it's back in action. $35 shipped.

          Comment

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