Announcement

Collapse
No announcement yet.

Lg 55ef950 oled screen artifacts

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    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?






    #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


      #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


        #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


          #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


            #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


              #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.

              Comment

              Working...