Lg 42ln5300 led strips replace

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  • crdz66
    Badcaps Veteran
    • Nov 2012
    • 242
    • USA
    #1

    Lg 42ln5300 led strips replace

    Hello everyone.

    I have a lg tv model 42ln5300 with black screen but with sound.

    I noticed that the voltage going to led strips was too high according the specs.
    So i decided to check the led strips and i find one led burn out(1 of the 9) and one full line led strips out (no lights).

    So i bought two complete led strips (9 total each).
    So far was good.
    The problem start when i put everything back panels, boards,etc)

    as soon turn on the tv i see shortly light from led strips and turn off and now is back black again.

    My question guys is...
    Do you recommend everytime replace the all led strips and no just some??????
    This tv have 6 complete led strips and i replace just bad ones(2)


    i'm process of learning from my mystakes.
    Tags: None
    • freakaftr8
      Badcaps Legend
      • Oct 2012
      • 3743
      • USA
      #2
      Re: Lg 42ln5300 led strips replace

      Yes. Another LED on a strip was ready for failure. This has happened to me before. That's why when I get the LED array running, I leave it on for about an hour before I start reassembly. Just insurance that it's going to last.
      Did I leave the soldering iron on?

        Comment

        • budm
          Badcaps Legend
          • Feb 2010
          • 40746
          • USA
          #3
          Re: Lg 42ln5300 led strips replace

          Did you verify that all the LEDs are on before putting the LCD panel back together? I usually let it run like that for at least 15 minutes. You also need to very that all the SMD connectors on the LED strip do not have bad soldering works, those connector are know for bad connection.
          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

            • crdz66
              Badcaps Veteran
              • Nov 2012
              • 242
              • USA
              #4
              Re: Lg 42ln5300 led strips replace

              ok guys thanks.

                Comment

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