Panasonic TH-50PX70B upper screen fault

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  • G1ZMO
    New Member
    • Oct 2015
    • 6
    • United Kingdom
    #1

    Panasonic TH-50PX70B upper screen fault

    I was recently given a Panasonic TH-50PX70B with a slight fault.
    After a while the top half of the screen starts flickering and sometimes goes black.
    After some googling I've seen that it might be the 'upper y buffer board' or the SU board however I havent been able to confirm that the part numbers I've found might be these boards
    What I've found are:
    TNPA4188 + TNPA4189 buffer boards
    TNPA4169 1 C1 TXNC11HMTB
    TNPA4170 1 C2 TCNC21HMTB
    TNPA4189 1 SD TXNSD1HMTB

    Can anyone tell me which of these might fix the problem please? (Picture of issue attached)

    Thanks
    Paul
    Attached Files
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    • tw2005
      Badcaps Legend
      • Oct 2011
      • 6458
      • Australia
      #2
      Re: Panasonic TH-50PX70B upper screen fault

      TNPA4188 is the SU board (upper buffer)

        Comment

        • G1ZMO
          New Member
          • Oct 2015
          • 6
          • United Kingdom
          #3
          Re: Panasonic TH-50PX70B upper screen fault

          Thanks tw2005

          It's an intermittent problem. Could it just be a cable seating issue?

          Is there anything I should be aware of if replacing the board? (other than allowing the tv to discharge overnight)

          Thanks

            Comment

            • tw2005
              Badcaps Legend
              • Oct 2011
              • 6458
              • Australia
              #4
              Re: Panasonic TH-50PX70B upper screen fault

              you could try reseating any cables from the sc to the su but it looks most like a faulty SU.

                Comment

                • G1ZMO
                  New Member
                  • Oct 2015
                  • 6
                  • United Kingdom
                  #5
                  Re: Panasonic TH-50PX70B upper screen fault

                  OK, that's my first task for tomorrow. Failing that I'll order the SU board.
                  Will let you know how I get on.

                  Thanks
                  Paul

                    Comment

                    • G1ZMO
                      New Member
                      • Oct 2015
                      • 6
                      • United Kingdom
                      #6
                      Re: Panasonic TH-50PX70B upper screen fault

                      Reseated the ribbon cables but the fault persists so I'll order the board.
                      Will update the thread when it's replaced.

                        Comment

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