Sony Bravia KDL 46EX520 Faulty T-con board or LCD panel -- Horizontal lines

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  • Kieran87
    New Member
    • May 2019
    • 3
    • Australia
    #1

    Sony Bravia KDL 46EX520 Faulty T-con board or LCD panel -- Horizontal lines

    Hello,

    Yesterday, horizontal lines appeared on my television and I am unsure whether the problem lies with the T-con board or LCD panel.

    I have removed the back housing and visually there are no obvious electronic issues. I then removed one of the ribbon cables from the T-con board, which resulted in blacking out half of the screen and the other half appeared normal (ie problem resolved - no distortion). I replaced the ribbon and then removed the second ribbon and there were horizontal lines across the entire screen.
    I have attached several photos.

    Any advice or other checks would be appreciated.

    Thanks in advance.
    Attached Files
    Tags: None
    • budwich
      Badcaps Legend
      • Jul 2015
      • 3097
      • Canada
      #2
      Re: Sony Bravia KDL 46EX520 Faulty T-con board or LCD panel -- Horizontal lines

      the last two picture show vertical lines... those are usually not good as there is likely a problem with the panel near that area. You can check the tabs in and near the area. Is the panel on this set connected to a small edge board at the bottom or top? You might get lucky by carefully checking the edge board for a component failure (resistor or capacity). The corner area also drives the side of the panel which is the reason that you see the lines in the second picture.

        Comment

        • nomoresonys
          Badcaps Legend
          • Jan 2013
          • 12181
          • U.S.
          #3
          Re: Sony Bravia KDL 46EX520 Faulty T-con board or LCD panel -- Horizontal lines

          If no luck finding/fixing fault, the "cutoff tape" method might get you a good image.

            Comment

            • Kieran87
              New Member
              • May 2019
              • 3
              • Australia
              #4
              Re: Sony Bravia KDL 46EX520 Faulty T-con board or LCD panel -- Horizontal lines

              Thanks for your responses.
              The edge board is on the bottom and seems quite hard to get to. I will check the panel tabs tonight.

              If it sounds like it might be a panel problem it looks like i will be needing a new TV.

              I dont know what the "cutoff" tape method is.

              Thanks again.

                Comment

                • nomoresonys
                  Badcaps Legend
                  • Jan 2013
                  • 12181
                  • U.S.
                  #5
                  Re: Sony Bravia KDL 46EX520 Faulty T-con board or LCD panel -- Horizontal lines

                  Not much to it, may have to play with the width of the tape to get it right, might work might not: https://www.youtube.com/watch?v=j7vl7-vZEL8

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