Sharp lc-43n4000u

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  • Clutch1819
    Member
    • Nov 2014
    • 11
    • U.S.

    #1

    Sharp lc-43n4000u

    I have a sharp lc-43n4000u set that was struck by lightning surge. How do I start diagnosing the problem? Just repaired a Samsung 65 inch with the same problem. Replaced main board and it works fine. I tried the same procedure with unplugging the main board and plugged the set in but it did not power the backlights up. Where do I start?
  • Andrew F. Ali
    Badcaps Legend
    • Jan 2014
    • 2450
    • Trinidad & Tobago

    #2
    Re: Sharp lc-43n4000u

    Not all TV brands turn on their backlights when the Main Bd is disconnected. Some SAMSUNG TVs do. Most likely the Main Bd in the SHARP TV is destroyed, also. However, we would need photos and voltage readings to better assess your situation.

    Comment

    • budm
      Badcaps Legend
      • Feb 2010
      • 40746
      • USA

      #3
      Re: Sharp lc-43n4000u

      Start by providing good clear pictures of the backside of the TV showing all the boards so we can see what we are dealing with.
      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

      • Redrebel10
        Senior Member
        • Jun 2017
        • 89
        • United States

        #4
        Re: Sharp lc-43n4000u

        If a TV was hit by lightning and backlights will only come on with main board disconnected from power board does that mean main board is the problem?

        Comment

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