Sanyo LED DP32D53 - Backlight but No Display

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  • caphair
    Badcaps Legend
    • Nov 2011
    • 1249

    #1

    Sanyo LED DP32D53 - Backlight but No Display

    Have this Sanyo that powers on, backlights come on but there's no display at all. Now even menu, volume, channel etc.

    Pressing volume up and down causes the backlight to flicker a bit but you don't see anything come on the screen.

    Update since posted: Unplugged Lvds connector and plugged back in and now it's working
    Attached Files
    Last edited by caphair; 12-01-2016, 12:59 PM. Reason: Update:
  • ReeceyBurger123
    Never Give Up !
    • May 2014
    • 7325
    • Britain

    #2
    Re: Sanyo LED DP32D53 - Backlight but No Display

    I would probably say panel failure, have you tested voltages on the tab driver board or scoped the Lvds signals ?
    Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !

    https://www.facebook.com/Telford-Tel...7894576335359/

    Comment

    • budm
      Badcaps Legend
      • Feb 2010
      • 40746
      • USA

      #3
      Re: Sanyo LED DP32D53 - Backlight but No Display

      If it goes out again then you should check and see if you have the DCV on the SMD fuse of that integrated T-CON board.
      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

      • caphair
        Badcaps Legend
        • Nov 2011
        • 1249

        #4
        Re: Sanyo LED DP32D53 - Backlight but No Display

        Tv does nothing now when power button is pressed.

        I have all voltages there. At the led conenctor I measure 56v as soon as Tv is plugged in. Is this supposed to jump higher when it's on or?

        Comment

        • budm
          Badcaps Legend
          • Feb 2010
          • 40746
          • USA

          #5
          Re: Sanyo LED DP32D53 - Backlight but No Display

          Originally posted by caphair
          Tv does nothing now when power button is pressed.

          I have all voltages there. At the led connector I measure 56v as soon as Tv is plugged in. Is this supposed to jump higher when it's on or?
          It should be higher when the PS-ON and BL-ON are present.
          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

          • caphair
            Badcaps Legend
            • Nov 2011
            • 1249

            #6
            Re: Sanyo LED DP32D53 - Backlight but No Display

            I don't see anything labeled ps_on or bl_on but I found a pin that changes from 3.3v to 0v when power button is pressed.

            Do the backlights come on first and then LCD or vice versa?

            Comment

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