Help with LG 47LV550W troubleshooting

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  • busigkille
    Member
    • Nov 2017
    • 21
    • Finland
    #1

    Help with LG 47LV550W troubleshooting

    Vertical white lines that gets lighter when menu button is pressed.

    Would apreciate the help on troubleshooting this one. Attached pictures of the display and model number.

    Back cover removed and looks normal. I have fixed tv:s before but i dont have expirence with this common problem
    Attached Files
    Last edited by busigkille; 11-11-2017, 06:57 PM.
    Tags: None
    • attainteddragon
      Badcaps Veteran
      • Apr 2013
      • 764
      • australia
      #2
      Re: Help with LG 47LV550W troubleshooting

      looks like a bad panel to me. disconnect a ribbon cable that goes from the t-con to the panel. power on and check the picture, then reinsert the cable and disconnect the other side.
      WHY CAN'T PHILIPS USE PHILLIPS HEAD SCREWS?

        Comment

        • budm
          Badcaps Legend
          • Feb 2010
          • 40746
          • USA
          #3
          Re: Help with LG 47LV550W troubleshooting

          Bad panel.
          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

            • tw2005
              Badcaps Legend
              • Oct 2011
              • 6458
              • Australia
              #4
              Re: Help with LG 47LV550W troubleshooting

              Bad panel is on the cards but I think if you can reflow or heat up the main IC on the mainboard it can be that. common problem. If you have another main from a LV LS or LW of the same year they may interface into it for a test. You'll have to do some research. Got someone over here chasing a LS5500 board, also looking for those others so may be some compatibility

              Good luck

                Comment

                • tw2005
                  Badcaps Legend
                  • Oct 2011
                  • 6458
                  • Australia
                  #5
                  Re: Help with LG 47LV550W troubleshooting

                  If you do not have maybe download the training manual.

                  It shows how you can force a test pattern at the T-con.

                    Comment

                    • busigkille
                      Member
                      • Nov 2017
                      • 21
                      • Finland
                      #6
                      Re: Help with LG 47LV550W troubleshooting

                      When cables from mainboard to t-con is removed (picture) the lines disapear and screen is completly empty/dark.

                      The T-Con board is behind the stand and need more work to get to. Can do this but if you guys are certain that its a bad panel i may as well scrap this one.

                      Any more toughts or things i should try?
                      Attached Files
                      Last edited by busigkille; 11-12-2017, 09:47 AM.

                        Comment

                        • busigkille
                          Member
                          • Nov 2017
                          • 21
                          • Finland
                          #7
                          Re: Help with LG 47LV550W troubleshooting

                          Originally posted by tw2005
                          If you do not have maybe download the training manual.

                          It shows how you can force a test pattern at the T-con.

                          Read about how to enable test pattern. But what kind of tools or wires should one use when making the jumper connections? Everything is so small.

                            Comment

                            • tw2005
                              Badcaps Legend
                              • Oct 2011
                              • 6458
                              • Australia
                              #8
                              Re: Help with LG 47LV550W troubleshooting

                              Mate never tried it but I do have a model I should be able to try it on. Won't be for a week though. I went looking for the training manuals cos I was reading up on a panasonic you can activate test pattern on txon from main board.

                                Comment

                                • busigkille
                                  Member
                                  • Nov 2017
                                  • 21
                                  • Finland
                                  #9
                                  Re: Help with LG 47LV550W troubleshooting

                                  Problem was bad panel, TV got scrapped. Thank you for your help everyone.

                                    Comment

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