LG 42PA4500 Suspected bad main board (double check my logic)

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  • hardwareguy
    Badcaps Veteran
    • Jun 2006
    • 405
    • USA

    #1

    LG 42PA4500 Suspected bad main board (double check my logic)

    I just want a sanity check here...

    Got this TV that has funny noises from the Y sustain board, no picture and no sound. Other than a dimly lit black background, it's dead. I don't even get a standby light. The optical audio terminal doesn't have a red light either, which I find odd.

    Vs and Va are happy and I have 5.2 and 17V to the mainboard as well.

    If I short the test pattern pads on the panel LVDS interface board and plug the set in, I get some pretty test patterns. Funny noises from Y sustain cease when the patterns are playing, it gives only a very faint hum.

    This does indeed confirm the main signal input/processor board is faulty correct?
  • sordids999
    Badcaps Legend
    • May 2013
    • 2149
    • uk

    #2
    Re: LG 42PA4500 Suspected bad main board (double check my logic)

    If you get test patterns then it Sounds like a possible main board fault

    Comment

    • ReeceyBurger123
      Never Give Up !
      • May 2014
      • 7325
      • Britain

      #3
      Re: LG 42PA4500 Suspected bad main board (double check my logic)

      Dont think we needed a thread, you've answered your own question plenty of threads like this that prove also. Your mainboard is faulty, likely bga solder issue but if you dont feel confident reflowing replace the board.
      Last edited by ReeceyBurger123; 10-26-2016, 05:40 AM.
      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 !

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      Comment

      • hardwareguy
        Badcaps Veteran
        • Jun 2006
        • 405
        • USA

        #4
        Re: LG 42PA4500 Suspected bad main board (double check my logic)

        Just confirming here. I don't do many PDP sets at all.

        Comment

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