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Sharp 32" LCD Picture failure Troubleshoot

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    Sharp 32" LCD Picture failure Troubleshoot

    Hi I have a Sharp LC-32P50E which is about nine years old worked fine until 2 weeks ago screen went to one white horizontal line 2 green verticle bands. I reseated all ribbons and cheaked caps on power board.
    I contacted a company on Ebay who suplies second hand t-cons and they said it was probably screen or the driver boards mounted ontop of the screen.
    I seen somewhere else where they suggested disconecting one of the ribbons from the t-con. The result when i disconnect r/h ribbon screen goes white on r/h side and stays blank with thin light verticle red line on left. When i disconnect l/h ribbon l/h screen goes white and l/h screen goes blank. Am i right in sugesting that the T-con is not processing the picture and fact the screen goes white shows LCD and driver boards work OK. I also out pressure on the six ribbons from driver to LCD and there is no bad conncetions.

    If its junk i will junk it but if its just a bad cap or t-con i will repair
    Any help would be great Thanks

    #2
    Re: Sharp 32" LCD Picture failure Troubleshoot

    https://www.badcaps.net/forum/showthread.php?t=39740
    Never stop learning
    Basic LCD TV and Monitor troubleshooting guides.
    http://www.badcaps.net/forum/showthr...956#post305956

    Voltage Regulator (LDO) testing:
    http://www.badcaps.net/forum/showthr...999#post300999

    Inverter testing using old CFL:
    http://www.badcaps.net/forum/showthr...er+testing+cfl

    Tear down pictures : Hit the ">" Show Albums and stories" on the left side
    http://s807.photobucket.com/user/budm/library/

    TV Factory reset codes listing:
    http://www.badcaps.net/forum/showthread.php?t=24809

    Comment


      #3
      Re: Sharp 32" LCD Picture failure Troubleshoot

      Hi Just joined and yes makes perfect sense to give some pictures sorry for that.
      I have four pictures of the main power board. I will take some more pictures with the back cover removed tomorrow. Other picture when set is switched on shows Just verticle line, when channel is changed or i suspect onscreen graphic is ment to be present the white horizontal line shows. Last screen picture shows Half the screen white this is with the L/H t-con disconnected.
      I didnt take a picture when R/H t-con is diconected but its the same. I have a PDF Schematic also i can put if up if required.

      Thanks for replies.

      ATTACH]94590[/ATTACH]











      Attached Files

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        #4
        Re: Sharp 32" LCD Picture failure Troubleshoot

        It looks like bad panel to me: see PDF about T-CON board.
        https://www.badcaps.net/forum/showpo...4&postcount=12
        Never stop learning
        Basic LCD TV and Monitor troubleshooting guides.
        http://www.badcaps.net/forum/showthr...956#post305956

        Voltage Regulator (LDO) testing:
        http://www.badcaps.net/forum/showthr...999#post300999

        Inverter testing using old CFL:
        http://www.badcaps.net/forum/showthr...er+testing+cfl

        Tear down pictures : Hit the ">" Show Albums and stories" on the left side
        http://s807.photobucket.com/user/budm/library/

        TV Factory reset codes listing:
        http://www.badcaps.net/forum/showthread.php?t=24809

        Comment


          #5
          Re: Sharp 32" LCD Picture failure Troubleshoot

          Thanks budm. It looks like that from reading about it. I have no freeze spray so didnt try that method for checking the screen. I have had the top off and checked the two driver circuit and six ribbon cables with pressure but nothing changed. I have seen youtube vids about ribbon cables comming away but i suspect there is no other fix for LCD with this issue. I am presuming all voltages to tcon are good dont know would bad or low supply cause this issue, Looks like its for Recycle
          Last edited by atlantimd; 09-14-2014, 07:08 AM.

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