Samsung UE55JU6875 issue after backlight replacement

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  • nicke74
    Member
    • Mar 2023
    • 16
    • sweden
    #1

    Samsung UE55JU6875 issue after backlight replacement

    Got problem with a samsung UE55JU6875 after replacemant of backlight
    I have done similar replacement several times before without any issues but now I got video problems after the replacement and do not understand why

    Attached picture of the problem
    Is it a bad panel or any issues with the T-con card or ribbon cables or bad connections?.

    I have tried to replace both ribbon cables from T-con to panel without any difference.

    Any ideas?

    The only misstake I might have done was forgot to remove the ribbon cables from the T-con card before testing the backlight so they might accidenly have touched to chassi during the test. Any fuses or similiar on the T-con card?
    Attached Files
    Last edited by nicke74; 04-02-2023, 11:44 AM.
    Tags: None
    • nomoresonys
      Badcaps Legend
      • Jan 2013
      • 12137
      • U.S.
      #2
      Re: Samsung UE55JU6875 issue after backlight replacement

      Fuse should be by the connector, usually labeled starting with F, may be under the heatsink, you could try turning on tv and checking around for voltage on the tcon or remove that nice heatsink that samsung put on there, which is surprising.

        Comment

        • nomoresonys
          Badcaps Legend
          • Jan 2013
          • 12137
          • U.S.
          #3
          Re: Samsung UE55JU6875 issue after backlight replacement

          I think you are saying you had lvds cable from mainboard to tcon in place and cables from tcon to panel unhooked, correct?

            Comment

            • Limilkeb74
              New Member
              • Apr 2023
              • 1
              • USA
              #4
              Re: Samsung UE55JU6875 issue after backlight replacement

              Does any one know how to get the administrative password for the dell latitude 3310 it was a school issue

                Comment

                • nicke74
                  Member
                  • Mar 2023
                  • 16
                  • sweden
                  #5
                  Re: Samsung UE55JU6875 issue after backlight replacement

                  yes exacly. I had the LVDS cable in place but cables from T-con to panel was ofcourse not connected to the panel since the panel was removed. My thinking was that those cables could have toutched the metal frame and been grounded during the test and caused some damage to the Tcon card.

                  I have found one fuse which was ok but will remove the metal shield as well.

                  I have tried to only have the left and the right cables from the Tcon attached without getting any trace of a picture anyway, that was the reason to think the problem is related to Tcon card or maincard

                    Comment

                    • nomoresonys
                      Badcaps Legend
                      • Jan 2013
                      • 12137
                      • U.S.
                      #6
                      Re: Samsung UE55JU6875 issue after backlight replacement

                      so do you get about 12 volts dc on each side of the fuse, black probe on metal chassis ground.

                        Comment

                        • Davi.p
                          Hobbist Tech
                          • Sep 2009
                          • 4315
                          • Italy - Milan
                          #7
                          Re: Samsung UE55JU6875 issue after backlight replacement

                          bad tcon

                            Comment

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