LG 55LD520 Backlight Inverter common issue repair

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  • Sevenqi
    Badcaps Veteran
    • Jul 2011
    • 292
    #1

    LG 55LD520 Backlight Inverter common issue repair

    Got this TV, tried to turn on, the screen flashing less than a second then went black, then power off. But when press any button, it show picture same short time then black again. This is obvious the backlight issues.
    LG LCD TV uses master and slave inverters, this symptom looks like the one part of the inverters working but other part didn't.

    Open the back cover and saw the connectors between upper and lower inverters for the mater inverters were fired, really bad look.

    So I cut and soldered out/clean the connectors, only keep the 4 wires (for the inverter feed back), and connected them with 4 proper size wires.

    Powered on, backlight came back and TV works good. Hope this can help some one has same issue.
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    • skcatch
      New Member
      • Oct 2014
      • 4
      • US
      #2
      Re: LG 55LD520 Backlight Inverter common issue repair

      Cool, I'm currently working on the same model TV.

        Comment

        • Ceramiclover
          New Member
          • Nov 2015
          • 1
          • United States
          #3
          Re: LG 55LD520 Backlight Inverter common issue repair

          Tried this repair but TV turns right off. Any guidance on testing?

            Comment

            • ReeceyBurger123
              Never Give Up !
              • May 2014
              • 7325
              • Britain
              #4
              Re: LG 55LD520 Backlight Inverter common issue repair

              Yep seen this before on a Sharp inverter, do you have a DMM ?
              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/

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