Slight backlight problem after replacing main AV card on LG 65UB680

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  • marekk
    Member
    • Mar 2013
    • 36
    • UK
    #1

    Slight backlight problem after replacing main AV card on LG 65UB680

    Hi,
    I was struggling to find replacement of the main AV card for 65" LED LG TV 65UB680 and finally I have purchased main board for 79" model 79UB680.
    Board does fit and works except slight problem with backilight at startup where two bit darker bands are visible. As soon as picture is displayed fault is not visible. I believe that such fault is caused by different firmware design for bigger screen.

    Could you let me know how to access service menu on that model to change screen size?

    I have tried common metods like "Press and hold <OK> buttons on remote as well as TV panel for a few seconds" and none of them worked for me.

    Do I need service remote?

    I will appreciate a lot any help.





    https://ibb.co/S7F2KcL
    https://ibb.co/zJCD0xJ
    Last edited by marekk; 06-23-2021, 08:55 AM.
    Tags: None
    • neilc6
      Badcaps Legend
      • Nov 2015
      • 1550
      • Canada
      #2
      Re: Slight backlight problem after replacing main AV card on LG 65UB680

      You need a LG service remote to enter service menu or a cellphone with IR and an app that can send the "INSTART" command.

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