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Samsung PN58A55081FXZA. Is it hopeless?

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    #1

    Samsung PN58A55081FXZA. Is it hopeless?

    So I have been working on this TV for probably 6 months on my off time. Had to trace down a PS issue. Finally got it fixed and powered up and had some no picture areas. turn out the flex cable on the panel was loose. Reseated them, but still had 2 one or so pixel wide green bars but really wasn't very noticeable at all. This wasn't even a week ago. Then last night the area behind the green lines went black. Thought maybe I didn't seat the flex cable right. Pulled the back off, reseated the cable multiple times, and this is all I can get.

    Is it hopeless? Think I might get lucky and get a use panel somewhere? Appears to be part # BN96-05638C or replacement BN96-14645A.

    What exactly caused this?

    Man what a bummer. All that work for 5 days of use.
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    #2
    Re: Samsung PN58A55081FXZA. Is it hopeless?

    With the panel off reseat the smaller copper colored ribbon cable on the buffer that is inline with the void area.

    Also a quick test take a toothpick and gently rub the afflicted area ribbon cable while the panel is on to see if the void area changes colors ect. Do this at the top lock connecter touching the toothpick to the ribbon cable.
    Last edited by Shinju; 11-25-2014, 06:17 PM.

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      #3
      Re: Samsung PN58A55081FXZA. Is it hopeless?

      Pushing the cable affected it a little bit but not much

      Comment

        #4
        Re: Samsung PN58A55081FXZA. Is it hopeless?

        Did you clean the connectors/cables with alcohol yet before reseating ?

        Comment

          #5
          Re: Samsung PN58A55081FXZA. Is it hopeless?

          Ok, so that means it's working, clean that ribbon and dabble some alcohol inside the ribbon connector.

          Comment

            #6
            Re: Samsung PN58A55081FXZA. Is it hopeless?

            I cleaned it earlier with alcohol didn't seem to matter.

            Also, I just noticed - right above the 2 cables that are giving me trouble, the metal bracket/frame is noticeably hotter than the rest of the top of the unit if that makes any sense.

            Thanks
            Attached Files
            Last edited by LameCooter; 11-25-2014, 11:49 PM. Reason: add pic

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              #7
              Re: Samsung PN58A55081FXZA. Is it hopeless?

              Maybe the buffer board is bad, the heat is Probaby the ICs in the ribbons working hard. Might be a failed panel too.

              Comment

                #8
                Re: Samsung PN58A55081FXZA. Is it hopeless?

                I swapped the buffer boards around with the lower one - no difference. I edited previous post with image.

                Thanks

                Comment

                  #9
                  Re: Samsung PN58A55081FXZA. Is it hopeless?

                  You didn't happen to try to disconnect this cable connection with the tv on did you? That will kill a chip on film ic..
                  Last edited by freakaftr8; 11-25-2014, 11:56 PM.
                  Did I leave the soldering iron on?

                  Comment

                    #10
                    Re: Samsung PN58A55081FXZA. Is it hopeless?

                    Try directing cool air at that location and see if it changes the screen output. If you removed that heatsink perhaps it was not reinstalled properly.

                    Comment

                      #11
                      Re: Samsung PN58A55081FXZA. Is it hopeless?

                      @freakaftr8: No made sure tv was off

                      @mmartell OK I'll try that. I didnt remove heatsink. At least not on purpose. Where is it?

                      Comment

                        #12
                        Re: Samsung PN58A55081FXZA. Is it hopeless?

                        The aluminum bar at the ends of your two red arrows in the picture is one long heatsink. It wicks away the heat from the cof's on the ribbons plugged into those bottom address buffers.

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                          #13
                          Re: Samsung PN58A55081FXZA. Is it hopeless?

                          Yeah I never pulled that off.

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