UN55KS800DFXZA Rebooting

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  • Plurxtc1
    Senior Member
    • Oct 2014
    • 136
    • USA
    #1

    UN55KS800DFXZA Rebooting

    I have a UN55KS800DFXZA that's constantly rebooting. I noticed that I have burnt resistors on the FAR LEFT and FAR RIGHT Panel driver. Disconnecting those drivers the outer drivers while the middle ones plugged in will keep the TV on.
    The left driver has two resistors: R043 and R044. R044 has a burnt imprint. It has 2,000k ohm resistance in circuit while R043 has around 50 ohms. Are they both the same part number?
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    • Plurxtc1
      Senior Member
      • Oct 2014
      • 136
      • USA
      #2
      Re: UN55KS800DFXZA Rebooting

      Update: I replaced all resistors with 51R0. Did not resolve the issue. Will update everyone if I resolved the issue.

        Comment

        • Davi.p
          Hobbist Tech
          • Sep 2009
          • 4456
          • Italy - Milan
          #3
          Re: UN55KS800DFXZA Rebooting

          Have you replaced both R on both boards? Test VGHD / 1 / 2 on both board. Make some pictures of both detached boards.. check if the two resistors are connected to some diodes or u0001.

            Comment

            • Plurxtc1
              Senior Member
              • Oct 2014
              • 136
              • USA
              #4
              Re: UN55KS800DFXZA Rebooting

              Originally posted by Davi.p
              Have you replaced both R on both boards? Test VGHD / 1 / 2 on both board. Make some pictures of both detached boards.. check if the two resistors are connected to some diodes or u0001.
              VGHD voltage was low when the panel fired up 0.3V. I disconnected the Outside Right Driver and the Outside Left Driver resistors burned. The Diode was hot. I replaced the diode and it solved the Outside Left Driver, but the Outside Right Driver was still turning off. I removed the Diode that was attached the to resistors and the TV turned on and working. I replaced both diode and it is working great now!

                Comment

                • Davi.p
                  Hobbist Tech
                  • Sep 2009
                  • 4456
                  • Italy - Milan
                  #5
                  Re: UN55KS800DFXZA Rebooting

                  Good... so you was meaning the diode packs with 10 pins?

                    Comment

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