Reseating Ribbon Connectors while TV is on

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  • SCITOMMY
    Member
    • Dec 2013
    • 35
    • US
    #1

    Reseating Ribbon Connectors while TV is on

    I have a 2011 Panasonic Plasma and when replacing the SN board I got 3 horizontal black bars across the screen.

    I then went ahead and reseated 1 of the ribbon cables going to the SN board and one of the black bars went away.

    While reseating the next one, the TV shut down and gave me 7 blinking lights.

    The whole time the TV was powered on.

    My question is, what is the most common cause for the TV to shut down?

    I read somewhere that something happened to the SN board. What did I likely damage and what is the most common fix?

    Thanks!

    Tommy
    Tags: None
    • SCITOMMY
      Member
      • Dec 2013
      • 35
      • US
      #2
      Re: Reseating Ribbon Connectors while TV is on

      This is also a good thread to warn people not to reseat any cable with the TV powered on!

        Comment

        • freakaftr8
          Badcaps Legend
          • Oct 2012
          • 3743
          • USA
          #3
          Re: Reseating Ribbon Connectors while TV is on

          You either shorted the sn board the buffer board or worse the buffer board sn board and power supply.

          Never mess with cables while the tv is on. Lots of stored up voltage and with the voltage going to the panel in plasma TVs there is quite a bit of voltage there.
          Did I leave the soldering iron on?

            Comment

            • SCITOMMY
              Member
              • Dec 2013
              • 35
              • US
              #4
              Re: Reseating Ribbon Connectors while TV is on

              Originally posted by freakaftr8
              You either shorted the sn board the buffer board or worse the buffer board sn board and power supply.

              Never mess with cables while the tv is on. Lots of stored up voltage and with the voltage going to the panel in plasma TVs there is quite a bit of voltage there.
              I'm thinking I shorted a buffer driver IC on the SN board (SD, SU, SC in one board)

              I would think one of SN board or Power Supply would short out before they both short out at the same time.

              Is it possible the Power Supply would short out only?

              I am getting 7 blinking LED lights and that indicates the SN board though.

                Comment

                • tw2005
                  Badcaps Legend
                  • Oct 2011
                  • 6458
                  • Australia
                  #5
                  Re: Reseating Ribbon Connectors while TV is on

                  Never reseat panel ribbons with the TV running, you've blown your SN. There was another instance of this recently posted of someone doing the same thing.

                    Comment

                    • SCITOMMY
                      Member
                      • Dec 2013
                      • 35
                      • US
                      #6
                      Re: Reseating Ribbon Connectors while TV is on

                      Originally posted by tw2005
                      Never reseat panel ribbons with the TV running, you've blown your SN. There was another instance of this recently posted of someone doing the same thing.

                      That was likely me that did that

                      I was wondering what component on SN board would most commonly blow by doing this? That's really my original question.

                        Comment

                        • tw2005
                          Badcaps Legend
                          • Oct 2011
                          • 6458
                          • Australia
                          #7
                          Re: Reseating Ribbon Connectors while TV is on

                          Not sure, buffer ICs or maybe some of the IGBTs or both. I've never been in this position to investigate it.

                            Comment

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