le40m86bd on only with power button pressed down

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  • zomi
    Badcaps Veteran
    • Nov 2011
    • 505

    #1

    le40m86bd on only with power button pressed down

    le40m86bd

    Have repaired the psu.

    Have swapped out the main board with a known working one set works fine.

    With the original board.
    Have replaced the eprom.

    But set will only power on by keeping the power button pressed then letting go once the picture comes on..

    Without doing this it keeps cycling though the power cycle
    And failing to power on..

    Any ideas...
    Will upload pictures in the morning...
  • zomi
    Badcaps Veteran
    • Nov 2011
    • 505

    #2
    Re: le40m86bd on only with power button pressed down

    Sorry forgot to add main board is BN41-00813B

    Comment

    • KevinCro
      Senior Member
      • May 2014
      • 104
      • United States

      #3
      Re: le40m86bd on only with power button pressed down

      Do you have to hold the remote button down or does it work at all?

      Comment

      • zomi
        Badcaps Veteran
        • Nov 2011
        • 505

        #4
        Re: le40m86bd on only with power button pressed down

        Sorry I don't think it was clear

        The actual power button on the front of the lcd itself
        not the remote.

        once run and i power off it starts to cycle again and only powers on by
        hol down the power button on the front of the lcd

        Comment

        • zomi
          Badcaps Veteran
          • Nov 2011
          • 505

          #5
          Re: le40m86bd on only with power button pressed down

          Once powered on like that it seems to run fine.
          Just had it running for about 1-2 hours so far no issues.

          Comment

          • tom66
            EVs Rule
            • Apr 2011
            • 32560
            • UK

            #6
            Re: le40m86bd on only with power button pressed down

            Hmm, could be intermittent power button PCB. Try cleaning...

            Have you tried service menu reset?
            Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
            For service manual, schematic, boardview (board view), datasheet, cad - use our search.

            Comment

            • zomi
              Badcaps Veteran
              • Nov 2011
              • 505

              #7
              Re: le40m86bd on only with power button pressed down

              Just to update:

              the power was on the main board

              After running for a for few hours.
              It abruptly turns off and then displays rainbow colored vertcal lines.
              I think its a bga issue ? on this one ?

              Replacing the main board with a known good one
              fixes the issue.
              so I think its safe to assume a new board is needed..

              Comment

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