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Bush LED4012FHDCNTD Backlights

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    Bush LED4012FHDCNTD Backlights

    Hi all, I have a Bush LED4012FHDCNTD with a backlight fault.

    TV comes on as normal, backlights go out after a few mins, volume still present etc.

    Stripped it down and tested strips and all LEDs illuminate, have illuminated strips individually for half hour and non go off.


    Just wondering how I would connect tester to the plug to light the whole array? As there are 3 wires (pic attached)
    Attached Files

    #2
    Re: Bush LED4012FHDCNTD Backlights

    All sorted now

    Comment


      #3
      Re: Bush LED4012FHDCNTD Backlights

      So what was the root cause of the issue then?
      Related to this thread? https://www.badcaps.net/forum/showth...216#post940216
      Last edited by budm; 02-04-2020, 08:15 AM.
      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


        #4
        Re: Bush LED4012FHDCNTD Backlights

        Originally posted by budm View Post
        So what was the root cause of the issue then?

        1 faulty LED, it went out eventually.
        Have replaced it and so far the TV has been running fine, been on a few hours now

        No not related to that one, suprisingly, they have the same model numbers, but are 2 completely different sets in every way
        Last edited by Bloopeta; 02-04-2020, 08:17 AM.

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          #5
          Re: Bush LED4012FHDCNTD Backlights

          I actually got this one, thinking they would be the same, and I could swap out the boards to diagnose the other one, but the model number is the only similarity

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