Horizontal black lines suddenly appeared on 50" LG Plasma

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  • zmfc
    New Member
    • Dec 2014
    • 4
    • USA

    #1

    Horizontal black lines suddenly appeared on 50" LG Plasma

    Hey all, so I need some advice. The other day when I turned on the 50" LG in my living room, I noticed that there was a bar at the top of the screen that was brighter than the rest across all inputs. At first I thought it might have been some kind of burn in, but upon further inspection I found that the bar on top was actually the correct color and brightness, and that the bottom 4/5ths of the screen was darker than it should have been. I tried using the built-in Picture Wizard function, but it didn't help. Looking closely again, I saw that the picture isn't actually darker, but that every second line of pixels was just a black line, making the picture look dark. It's kind of hard to describe, so here is a picture of how it looks and here is a closeup of the upper left where it transitions from alternating black and colored lines to normal.

    In the research I've done so far, I found a response on justanswer that seems to be just about what I am talking about, but there it mentions that the y buffer board is divided in thirds, and mine seems to be more than just 2/3rds of the screen. Just wanted to confirm with one of you guys before I order a new board. Thanks in advance for your help.
    Last edited by zmfc; 12-22-2014, 12:55 PM. Reason: forgot a detail
  • zmfc
    New Member
    • Dec 2014
    • 4
    • USA

    #2
    Re: Horizontal black lines suddenly appeared on 50" LG Plasma

    Oh, forgot to mention the specific model number is 50PG60-UA. If anyone could help me find which parts I need that would also be great, as my initial searches are turning up a lot of distinct but very similar boards and I'm not sure which is appropriate.

    Comment

    • mmartell
      Badcaps Legend
      • Oct 2013
      • 3189
      • Canada

      #3
      Re: Horizontal black lines suddenly appeared on 50" LG Plasma

      Picture of the fault ?

      Comment

      • Caleb
        Smokin IC's
        • Feb 2013
        • 645
        • USA

        #4
        Re: Horizontal black lines suddenly appeared on 50" LG Plasma

        It does sound like it is failing buffer boards, a quick look at shopjimmy shows a possibility of several board combos in your tv, It would be a good idea to open the back of the tv and verify the part numbers you need before you order. On your tv there are 2 buffer boards each controls half the screen. On each board are several buffer ics each control about 2" of information
        Last edited by Caleb; 12-23-2014, 09:49 AM.
        Liberating magic smoke one part at a time

        Comment

        • zmfc
          New Member
          • Dec 2014
          • 4
          • USA

          #5
          Re: Horizontal black lines suddenly appeared on 50" LG Plasma

          Originally posted by mmartell
          Picture of the fault ?
          There are two linked in my original post

          Comment

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