LG 47LB6300 - Bad Mainboard or TCON?

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  • tucocaps
    Badcaps Veteran
    • Apr 2013
    • 331
    • United Stated
    #1

    LG 47LB6300 - Bad Mainboard or TCON?

    Another possible learning experience. This set has a damaged screen, but backlight appears to work, and set powers on and off and responds to remote.

    The problem is there is no sound from the set, and I don't see any screen changes on the LCD for picture (just white backlight). Also, the optical out and network cable jack show no light on the mainboard.

    Attached a picture of the mainboard. Didn't dig down to the TCON yet. There is a really small reset button of some sort on the main. When pushed, the backlights turn off, then back on when released.

    Thanks for any help!
    Attached Files
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    • tucocaps
      Badcaps Veteran
      • Apr 2013
      • 331
      • United Stated
      #2
      Re: LG 47LB6300 - Bad Mainboard or TCON?

      Any ideas on this one? Could the power board be at fault?

        Comment

        • selldoor
          Slow Learner
          • Dec 2010
          • 7870
          #3
          Re: LG 47LB6300 - Bad Mainboard or TCON?

          Perhaps set it all up - with a signal source dvd/pc ? scroll through the "sources "using the remote see if anything occurs . Try for sound with headphones press the "mute" button
          and try volume up on the remote. Next check the voltages on the connector from the power supply to the main - there may be clues near the socket as to what voltages there should be. - post a picture of the power supply.
          Please upload pictures using attachment function when ask for help on the repair
          http://www.badcaps.net/forum/showthread.php?t=39740

            Comment

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