Vizio E420VL One Vertical white line

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  • jason123
    Badcaps Legend
    • Oct 2015
    • 1040
    • USA
    #1

    Vizio E420VL One Vertical white line

    Hi folks,
    A question that someone may know the answer to without much effort.. I bought a Vizio E420VL and the only issue it has is a vertical line (very thin, almost like one column of pixels) about 1/3 of the screen from the right.

    It goes the full length of the screen vertically. I thought it was a glass bonding issue with tabs, but I can't seem to apply pressure anywhere to get rid of it. I reseated all cables - No luck.

    Any idea what that might be? Is it a tosser?
    Thanks
    Tags: None
    • budm
      Badcaps Legend
      • Feb 2010
      • 40746
      • USA
      #2
      Re: Vizio E420VL One Vertical white line

      It can be bad TFT driver embedded driver IC on the flexible PCB that is connected between the LCD panel and the tab bonding board.
      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

        • tom66
          EVs Rule
          • Apr 2011
          • 32560
          • UK
          #3
          Re: Vizio E420VL One Vertical white line

          Unfortunately in any case it is almost certainly a bad panel and not repairable, there is a small chance you could shim it with a "tab bond" fix but the longevity of such a repair is unknown. I guess if you want to keep it going for as long as possible you could try that.
          Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
          For service manual, schematic, boardview (board view), datasheet, cad - use our search.

            Comment

            • jason123
              Badcaps Legend
              • Oct 2015
              • 1040
              • USA
              #4
              Re: Vizio E420VL One Vertical white line

              Thank you. there are no ICs on the board between the LVDS cables and panel, only caps and resistors - tested ok I think.

              The puzzling part is that there is nowhere I can apply pressure or move the tab to get rid of this line. I just want to make sure it's not on the main board. I want to part it out and I don't want to sell a board that's defective.

                Comment

                • budm
                  Badcaps Legend
                  • Feb 2010
                  • 40746
                  • USA
                  #5
                  Re: Vizio E420VL One Vertical white line

                  TFT driver IC's, they are not on PCB, they are on flexible PCB.
                  Main board cannot cause single line on the screen.
                  Attached Files
                  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

                    • jason123
                      Badcaps Legend
                      • Oct 2015
                      • 1040
                      • USA
                      #6
                      Re: Vizio E420VL One Vertical white line

                      I see... makes sense i guess.. i was looking for the typical ICs.. thanks budm

                        Comment

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