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Lg 55ef950 oled screen artifacts

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  • jagiro84x
    Member
    • Mar 2022
    • 19
    • Holland
    #1

    Lg 55ef950 oled screen artifacts

    Hello there, my tv is showing weird screen artifacts whenever I try to play something on YouTube, or connect to any hdmi device

    Menus all look crisp and clear, YouTube video selection looks clear as wel, the artifacts only appear when i click on a video to play or switch to HDMI device
    I have no experience with tv repairs only laptops

    Here some pictures. Anyone have any idea what's the cause of this and what needs to be replaced to fix this?





    Tags: None
    • Davi.p
      Hobbist Tech
      • Sep 2009
      • 4831
      • Italy - Milan
      #2
      Re: Lg 55ef950 oled screen artifacts

      Io might take a look at the block diagrams, but for now it seems to me more like a cpu soldering problem, maybe the connection to a certain ddr memory chip where decoding is made.. or it has to do with video rights protections..
      Last edited by Davi.p; 12-18-2022, 04:16 PM.

        Comment

        • jagiro84x
          Member
          • Mar 2022
          • 19
          • Holland
          #3
          Re: Lg 55ef950 oled screen artifacts

          The cpu? I was thinking more about gpu or memory fault as there are similar artificats on laptops as wel when gpu fails, but am not really fimiliar with television.
          Also i couldn't find a diagram for this tv model
          Here on the picture u can see there are 2 logic boards on back of the tv




          bb ru

            Comment

            • jagiro84x
              Member
              • Mar 2022
              • 19
              • Holland
              #4
              Re: Lg 55ef950 oled screen artifacts

              I was thinking to try to repair one of those boards or order new one if i could pin point which one of those 2 is faulty and responsible for the artifacts, the middle one should be the tcon board i suppose, but the one on right side is another logic board , that's why I am not sure which one is faulty

                Comment

                • Davi.p
                  Hobbist Tech
                  • Sep 2009
                  • 4831
                  • Italy - Milan
                  #5
                  Re: Lg 55ef950 oled screen artifacts

                  there is not a gpu on a tv, the fault is in the main board, last photo, for me..

                    Comment

                    • comptek
                      Badcaps Veteran
                      • Aug 2013
                      • 606
                      • uk
                      #6
                      Re: Lg 55ef950 oled screen artifacts

                      When you switch off the to use the remote after it’s been on a good few minutes, then turn off with the remote and wait until red light turns off, try that it clears the screen…
                      Then if that doesn’t work, maybe use a service remote in-stop and In-start
                      Last edited by comptek; 12-23-2022, 04:04 AM. Reason: Added more info

                        Comment

                        • William1967
                          Badcaps Veteran
                          • Nov 2017
                          • 231
                          • Netherlands
                          #7
                          Re: Lg 55ef950 oled screen artifacts

                          The BGA with the XD logo left in the upper corner near the LVDS cables could be the culprit. All low resolution is displayed correct but the high resolution is not, had that once and after replacing the BGA it was gone.

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