Help with Backlight voltages DS GE6880

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  • Wilderone
    Senior Member
    • May 2018
    • 76
    • Australia
    #1

    Help with Backlight voltages DS GE6880

    Can I get some assistance please?

    I have this TV that backlights won't come on at all, I can jump them with the backlight tester okay & the voltage is 131v on each connector.

    The voltage from all 4 power supply connectors is 81.5v with reference to chassis ground.

    But still no backlight?
    Attached Files
    Tags: None
    • budm
      Badcaps Legend
      • Feb 2010
      • 40746
      • USA
      #2
      Re: Help with Backlight voltages DS GE6880

      1) Make and model of the TV?
      2) Pictures of the whole backside of the TV showing all the board?
      3) Pictures of the whole top and bottom side of the power supply/LED driver board?
      4) How high does the Voltage jump up to at the LED + if you leave the Black probe on the chassis and Red probe on the LED+ and then turn on the TV?
      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

        • Wilderone
          Senior Member
          • May 2018
          • 76
          • Australia
          #3
          Re: Help with Backlight voltages DS GE6880

          Originally posted by budm
          1) Make and model of the TV?
          2) Pictures of the whole backside of the TV showing all the board?
          3) Pictures of the whole top and bottom side of the power supply/LED driver board?
          4) How high does the Voltage jump up to at the LED + if you leave the Black probe on the chassis and Red probe on the LED+ and then turn on the TV?
          Thanks Budm

          1) Dick Smith GE6880
          4) 109.7v then down to stable 81.5v ( I don't have a min/Max function on my Multimeter but it's close to 110v
          Attached Files

            Comment

            • budm
              Badcaps Legend
              • Feb 2010
              • 40746
              • USA
              #4
              Re: Help with Backlight voltages DS GE6880

              3) Pictures of the whole top and bottom side of the power supply/LED driver 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

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