LG 60PG30 bottom third no picture

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  • martino
    Not so "senior"
    • Aug 2013
    • 997
    • canada

    #1

    LG 60PG30 bottom third no picture

    I have 3 of these tv's,all have the exact same problem,bottom third of the screen is black.

    I'm a bit lost here,as my thoughts go to the lower buffer board as a suspect.
    But that's where the fun starts.

    When I follow on screen where it stops displaying,I end up halve way the middle buffer IC. (see pic#3,I marked it). As far as I figured,the data signal goes from top to bottom?

    I sacrificed one of my lower buffer boards as the donor.

    I have replaced the middle IC 3 times now,with donor IC's,as I was doubting my solder skills.But it still doesn't display the bottom third of the screen. I tried the "repaired" board on two tv's with the same result.

    Am I wrong in thinking it is the middle IC? Any one had this before?
    Attached Files
    Proud owner of dozens of broken TV's and many,many,many boards.


    Our website and passion:http://hollenhundshepherds.com/
  • chrismurphy
    Badcaps Veteran
    • May 2014
    • 251
    • australia

    #2
    Re: LG 60PG30 bottom third no picture

    check for a blown surface mount resistor on the buffer board

    Comment

    • martino
      Not so "senior"
      • Aug 2013
      • 997
      • canada

      #3
      Re: LG 60PG30 bottom third no picture

      Hmmm,good point.Been so focused on the IC's that I never even thought about that.

      I did forget to mention that I could not measure a short from floating ground to the ribbon cable connectors.

      Will check the smd's ! thank you
      Proud owner of dozens of broken TV's and many,many,many boards.


      Our website and passion:http://hollenhundshepherds.com/

      Comment

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