LG 32LB9D LCD red dot snow issue.

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  • weaponepsilon
    Member
    • Dec 2014
    • 11
    • usa

    #1

    LG 32LB9D LCD red dot snow issue.

    someone gave me an lg lcd tv telling me it works. After i plugged it in, i found the reason it was given away. In the dark areas of the screen, red dots appear randomly like static or snow. Ive researched the issue and found that it is more common on plasma screens. Mostly its an over voltage on one of the boards requiring an adjustment to a pot. Problem is that there are none. I looked over the caps, i see none bulging or leaking. Has anyone seen this? (Man my phone hates this forum)
  • freakaftr8
    Badcaps Legend
    • Oct 2012
    • 3743
    • USA

    #2
    Re: LG 32LB9D LCD red dot snow issue.

    You could start by trying to reseat the lvds cable on both ends.
    Did I leave the soldering iron on?

    Comment

    • weaponepsilon
      Member
      • Dec 2014
      • 11
      • usa

      #3
      Re: LG 32LB9D LCD red dot snow issue.

      Here are some pics to better describe the issue. Apologies for my crappy phone.
      Attached Files

      Comment

      • weaponepsilon
        Member
        • Dec 2014
        • 11
        • usa

        #4
        Re: LG 32LB9D LCD red dot snow issue.

        I believe i checked all connections. I will double check. This is my backup game tv, my 55" magnavox is having a convergence issue again after a few years and I dont want to deal with the stk150 again...

        Comment

        • freakaftr8
          Badcaps Legend
          • Oct 2012
          • 3743
          • USA

          #5
          Re: LG 32LB9D LCD red dot snow issue.

          That's an interesting defect. I'm going to say bad lvds cable or tcon issue. I'm sure some of the more experienced guys will chime in.
          Did I leave the soldering iron on?

          Comment

          • budm
            Badcaps Legend
            • Feb 2010
            • 40746
            • USA

            #6
            Re: LG 32LB9D LCD red dot snow issue.

            Is this your T-CON board?
            http://assets.shopjimmy.com/media/ca...-1279a-top.jpg
            Never stop learning
            Basic LCD TV and Monitor troubleshooting guides.
            http://www.badcaps.net/forum/showthr...956#post305956

            Voltage Regulator (LDO) testing:
            http://www.badcaps.net/forum/showthr...999#post300999

            Inverter testing using old CFL:
            http://www.badcaps.net/forum/showthr...er+testing+cfl

            Tear down pictures : Hit the ">" Show Albums and stories" on the left side
            http://s807.photobucket.com/user/budm/library/

            TV Factory reset codes listing:
            http://www.badcaps.net/forum/showthread.php?t=24809

            Comment

            • weaponepsilon
              Member
              • Dec 2014
              • 11
              • usa

              #7
              Re: LG 32LB9D LCD red dot snow issue.

              I got to find my screwdrivers. Hang on

              Comment

              • weaponepsilon
                Member
                • Dec 2014
                • 11
                • usa

                #8
                Re: LG 32LB9D LCD red dot snow issue.

                Ok. Looks like it.

                Comment

                • weaponepsilon
                  Member
                  • Dec 2014
                  • 11
                  • usa

                  #9
                  Re: LG 32LB9D LCD red dot snow issue.

                  Woah. Hang on a sec. There is a loose piece of solder sitting on the right ribbon cable. I dont see where it came from, but it didnt solve the issue.
                  Last edited by weaponepsilon; 12-15-2014, 12:48 PM.

                  Comment

                  • weaponepsilon
                    Member
                    • Dec 2014
                    • 11
                    • usa

                    #10
                    Re: LG 32LB9D LCD red dot snow issue.

                    Is there a potential issue with my tcom?

                    Comment

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