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LG 65uf7690-uh picture problems

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    LG 65uf7690-uh picture problems

    When both sides of the Tcon are connected the TV picture looks like picture one and according to the person who owns the tv originally the problem was on top. If I disconnect the left cable to the Tcon then it looks like picture two and if I disconnect right side it looks like picture three. Now with either side disconnected the picture that is showing will start to fade. I am pretty sure bad panel but I have not ruled out the Tcon and am asking for advice. There are no side tabs so tab removal is out of the question.
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    #2
    Re: LG 65uf7690-uh picture problems

    Panel problem, since the tab bonding boards are on the bottom edge of the panel, you should inspect them, also inspect the side tabs (Gate drive) if it has any.
    Last edited by budm; 04-23-2019, 07:08 PM.
    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

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      #3
      Re: LG 65uf7690-uh picture problems

      Looking like panel issue, the cutoff tape method might get you a good image.

      Comment


        #4
        Re: LG 65uf7690-uh picture problems

        Thanks for the quick replies, sorry I did not answer earlier I never got a notification that it was answered.

        Comment


          #5
          Re: LG 65uf7690-uh picture problems

          This is the Mainboard, I did one recently.
          Common fault for the UF series.
          Notice the menus are still okay.
          There are revised boards available from LG suppliers.

          Comment


            #6
            Re: LG 65uf7690-uh picture problems

            The difference is my menu is not ok so that usually is the panel.

            Comment


              #7
              Re: LG 65uf7690-uh picture problems

              as suggested, try the "tape cutoff" method (placing a bit of tape on the tcon cable to block certain pins) and see if you can get a proper picture.

              Comment


                #8
                Re: LG 65uf7690-uh picture problems

                This video maybe worth watching https://www.youtube.com/watch?v=j7vl7-vZEL8

                Comment


                  #9
                  Re: LG 65uf7690-uh picture problems

                  Thanks for the response but still does not fix the tv issue. No mater where I put the tape the video still has lines in it.

                  Comment


                    #10
                    Re: LG 65uf7690-uh picture problems

                    Cut tape works on a lot of m, try turning down your backlights not brightness if possible, see if the double image clears up any.

                    Comment


                      #11
                      Re: LG 65uf7690-uh picture problems

                      After playing with the panel I found that the right side connector if pushed on clears up the picture so I am going to play with it to see if maybe it is just some bad solder.

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