Weird smeary failure mode with Westinghouse LCD

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  • RDC55
    Senior Member
    • Dec 2017
    • 180
    • United States

    #21
    Re: Weird smeary failure mode with Westinghouse LCD

    Here is a screenshot of the video. The vertical lines change with menu selections, but they are very slow to respond.

    Try the Video link by the original OP in post #1 - I had previewed the copied link that i posted and it worked, but now doesn't seem to??
    Attached Files

    Comment

    • Davi.p
      Hobbist
      • Sep 2009
      • 4259
      • Italy - Milan

      #22
      Re: Weird smeary failure mode with Westinghouse LCD

      I need the entire screen. Is it a led screen or CCFL?
      Last edited by Davi.p; 12-05-2020, 05:27 AM.

      Comment

      • RDC55
        Senior Member
        • Dec 2017
        • 180
        • United States

        #23
        Re: Weird smeary failure mode with Westinghouse LCD

        "I need the entire screen. Is it a led screen or CCFL?"

        "Try the Video link by the original OP in post #1 - I had previewed the copied link that i posted and it worked, but now doesn't seem to??"

        It's a 4K TV Model No.WE55UDT108, did you try the video as I suggested in post 1?

        Here is a pic of power on and then after pressing the menu button 3X – note the change in video takes several seconds to occur.

        It also has the oddity just like the OP that if you remove one of the panel ribbon cables the entire panel goes a soft white, not the normal where you are expecting half the panel to be bright. That is why I was asking about the Flash Memory located on the panel buffer board.

        Also some more pics of boards and back of TV
        Attached Files

        Comment

        • diif
          Badcaps Legend
          • Feb 2014
          • 6978
          • England

          #24
          Re: Weird smeary failure mode with Westinghouse LCD

          Originally posted by RDC55
          So no guesses on what these components are - DK1, DK2, and DK3 in attached pic?
          https://www.digikey.com/en/products/...AIDBVR/4341454
          Last edited by diif; 12-05-2020, 08:23 AM.

          Comment

          • Davi.p
            Hobbist
            • Sep 2009
            • 4259
            • Italy - Milan

            #25
            Re: Weird smeary failure mode with Westinghouse LCD

            Hi, no i can't watch the video in post 1 at least until monday when i go back to home. As i can see the defect moves so i guess there can be a liquid like soap inside the screen where there are panel boards (band pcb).

            Comment

            • RDC55
              Senior Member
              • Dec 2017
              • 180
              • United States

              #26
              Re: Weird smeary failure mode with Westinghouse LCD

              Thanks for the reply, but I don't see that in a 6 pin version - data sheet attached.
              Attached Files

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              • Davi.p
                Hobbist
                • Sep 2009
                • 4259
                • Italy - Milan

                #27
                Re: Weird smeary failure mode with Westinghouse LCD

                Them are diodes not comoarators..

                Comment

                • RDC55
                  Senior Member
                  • Dec 2017
                  • 180
                  • United States

                  #28
                  Re: Weird smeary failure mode with Westinghouse LCD

                  I haven't given up on this one yet and currently I am trying to determine why all of the LVDS signals appear dead when looking at them with a scope.

                  But, another learning question if someone knows. The attached pics have two parts circled that are located at the bottom of the chassis near the speakers. They each have one black wire connecting them to the Main board U1, and both check shorted to chassis. Removing the wires and it is the Main board U1 that is applying the ground to the wires - any idea what these are?
                  Attached Files
                  Last edited by RDC55; 12-07-2020, 05:27 PM. Reason: Upload pictures

                  Comment

                  • Davi.p
                    Hobbist
                    • Sep 2009
                    • 4259
                    • Italy - Milan

                    #29
                    Re: Weird smeary failure mode with Westinghouse LCD

                    I'm finally home by hospital, i have seen post 1 video but i see static bars on screen (video could be made better with view of entire screen) not moving like it seems to be on last posts images.. watch this new interesting video: https://www.youtube.com/watch?v=_vlOO5ekhgk&t=21s
                    in this video i see that there is a broken trace from tcon main chip and the part before COF and he connected a wire, it is a clock signal, if i understand CKV-something
                    any idea what these are?
                    leave them alone, the problem is within panel, so return to troubleshoot there..
                    Last edited by Davi.p; 12-07-2020, 06:40 PM.

                    Comment

                    • mmartell
                      Badcaps Legend
                      • Oct 2013
                      • 3189
                      • Canada

                      #30
                      Re: Weird smeary failure mode with Westinghouse LCD

                      Those are wifi antennae.

                      Comment

                      • NasTech
                        Senior Member
                        • Sep 2011
                        • 58

                        #31
                        Re: Westinghouse WD55UB4560 4K TV

                        I bought this Westinghouse WD55UB4560 4K TV from an individual who don't wanted it fix the original problem it had was no video I check some voltages on the FRC board it wasn't sending voltage to the T-CON board so I replaced the FRC board that's giving this results split video. Any help to resolve will be greatly appreciated.
                        Attached Files
                        Last edited by NasTech; 04-26-2021, 04:51 PM.

                        Comment

                        • Davi.p
                          Hobbist
                          • Sep 2009
                          • 4259
                          • Italy - Milan

                          #32
                          Re: Weird smeary failure mode with Westinghouse LCD

                          don't hijack other one's thread.. thanks..

                          Comment

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