Samsung ue32eh5000 no picture on half the screen

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  • Dannyx
    CertifiedAxhole
    • Aug 2016
    • 3912
    • Romania

    #1

    Samsung ue32eh5000 no picture on half the screen

    Good day folks. I believe I have another case of panel failure, but just thought I'd do a quick check and hear other people's opinion on the problem: I've got this Samsung TV which doesn't display anything on screen, despite the backlight coming on. I took it apart and what I tried first was disconnecting one of the buffer boards from the t-con board. The result is pictured below (sorry it got a bit shaky, I was holding the set up with one hand ): the half of the screen which was left connected had good crisp picture while the disconnected side was white. Try the same with the other buffer, but nothing comes on this time: just a black screen, so is this a dead buffer or is something up with the t-con board ? What would be most common ? There IS power coming into the t-con since it does display something. Do T-con boards have "channels" (like A and B) ? From my limited experience, I doubt it, since otherwise the functional side would come on even with both buffers connected, which doesn't happen: with both buffers connected, the screen stays blank, so perhaps there's a short or otherwise dead component on the faulty buffer which "kills" the T-con. Should I bother to remove the bezel and look at the buffers or would it be a waste of time ? Has anyone successfully repaired a buffer board before (assuming it's not a TAB bond that's failing) ?
    Attached Files
    Wattevah...
  • vinceroger69
    Badcaps Legend
    • Mar 2012
    • 6714
    • uk

    #2
    Re: Samsung ue32eh5000 no picture on half the screen

    maybe a shorted smd capacitor on the lcd panel pcb on that side of the screen

    Comment

    • Dannyx
      CertifiedAxhole
      • Aug 2016
      • 3912
      • Romania

      #3
      Re: Samsung ue32eh5000 no picture on half the screen

      Originally posted by vinceroger69
      maybe a shorted smd capacitor on the lcd panel pcb on that side of the screen
      That would be the fortunate case, though I shall check nonetheless.
      Wattevah...

      Comment

      • attainteddragon
        Badcaps Veteran
        • Apr 2013
        • 764
        • australia

        #4
        Re: Samsung ue32eh5000 no picture on half the screen

        remove the panel surround and apply pressure to the cof chips and the connections to the panel and driver board.
        normally the corner one fails but occasionally an inner one will fail.
        at least you will know quickly if it is a chip or connection causing it.

        smd caps can short, but i have never been that lucky yet.
        WHY CAN'T PHILIPS USE PHILLIPS HEAD SCREWS?

        Comment

        • tom66
          EVs Rule
          • Apr 2011
          • 32560
          • UK

          #5
          Re: Samsung ue32eh5000 no picture on half the screen

          Bad panel...almost certain.
          Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
          For service manual, schematic, boardview (board view), datasheet, cad - use our search.

          Comment

          • Dannyx
            CertifiedAxhole
            • Aug 2016
            • 3912
            • Romania

            #6
            Re: Samsung ue32eh5000 no picture on half the screen

            Ok guys update: I messed about with the buffers and took some measurements. I was gonna post the results here, which were VGH and VGL "dying" when the faulty buffer is connected, but something else happened in the meanwhile which renders this irrelevant now: I ripped one of the COFs while taking the bezel off.....don't know how, don't know when, but it DID happen. Knowing the TVs officially dead at that point, I stopped everything, snapped the bezel back and closed the cabinet back up (don't worry, it was dead when I got it, so I won't get in trouble). Due diligence told me to plug it in one last time to see what happens....amazingly, the TV now turns on, except of course there's a colorful stripe roughly 2cm wide on the left side of the panel where the ruined COF is....damn...so close. Funny thing is that despite wiggling the buffers around and checking the flex cables, it didn't come on with the back off the first time (even though the COF was already busted at that point). Lesson learned: check the buffers before declaring it dead.....oh, and watch those bezels: FRIGGIN' HARD and annoying to get off for some reason. Never had this issue before....
            Wattevah...

            Comment

            • tom66
              EVs Rule
              • Apr 2011
              • 32560
              • UK

              #7
              Re: Samsung ue32eh5000 no picture on half the screen

              I think you showed what we all thought, one of the COFs was shorted, you ripped it off and "fixed" it, the problem is, now it's missing a COF and won't work in that section.

              I fixed a Toshiba TV by doing this, because it used two COFs, for the row drivers, in parallel. Removing one allows the set to work, at the possible expense of a shorter lifespan of the remaining COF, but it's just a spare TV so that's fine.
              https://www.youtube.com/watch?v=s7sFN7Iwx8Y
              Last edited by tom66; 07-28-2017, 08:47 AM.
              Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
              For service manual, schematic, boardview (board view), datasheet, cad - use our search.

              Comment

              • Dannyx
                CertifiedAxhole
                • Aug 2016
                • 3912
                • Romania

                #8
                Re: Samsung ue32eh5000 no picture on half the screen

                Originally posted by tom66
                I think you showed what we all thought, one of the COFs was shorted, you ripped it off and "fixed" it, the problem is, now it's missing a COF and won't work in that section.

                I fixed a Toshiba TV by doing this, because it used two COFs, for the row drivers, in parallel. Removing one allows the set to work, at the possible expense of a shorter lifespan of the remaining COF, but it's just a spare TV so that's fine.
                https://www.youtube.com/watch?v=s7sFN7Iwx8Y
                I believe you're right: the defective side was the one that got torn apart....not completely unwatchable, but still can't charge anything for the QUOTE UNQUOTE..."repair"
                Wattevah...

                Comment

                • tom66
                  EVs Rule
                  • Apr 2011
                  • 32560
                  • UK

                  #9
                  Re: Samsung ue32eh5000 no picture on half the screen

                  I don't sell TVs that have tab bond repairs any more, too many failures.
                  Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                  For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                  Comment

                  • Dannyx
                    CertifiedAxhole
                    • Aug 2016
                    • 3912
                    • Romania

                    #10
                    Re: Samsung ue32eh5000 no picture on half the screen

                    Originally posted by tom66
                    I don't sell TVs that have tab bond repairs any more, too many failures.
                    I don't sell them per-se - I repair stuff and charge for that (provided it's successful and durable of course) - common sense.
                    Wattevah...

                    Comment

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