Samsung le40m86 main board issue.

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  • zomi
    Badcaps Veteran
    • Nov 2011
    • 505
    #1

    Samsung le40m86 main board issue.

    A slight problem with a le40m86

    On the main board.

    When powered up from cold

    the picutre jumps..
    Only for a short while
    When warm it functions perfeclty fine.
    Any one seen before
    Thinking a cap dry joint or failing cap ?
    Tags: None
    • zomi
      Badcaps Veteran
      • Nov 2011
      • 505
      #2
      Re: Samsung le40m86 main board issue.

      Also it keeps switching off till it is warm

        Comment

        • tom66
          EVs Rule
          • Apr 2011
          • 32560
          • UK
          #3
          Re: Samsung le40m86 main board issue.

          Could be panel tabs - but that would not cause switching off. Main boards do have a few faults on these models. BGA reflow may be necessary...
          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
              #4
              Re: Samsung le40m86 main board issue.

              Its not the panel tabs
              I have a good known working board that I have used to isolate the error

              loud static noise through the speakers..
              But then after a couple of mins its works fine..

              Going to test with digital tuner off

              then see how long it works when warm...
              If bga error shouldn't it freeze/ lock up after a while ??

                Comment

                • Dang
                  Badcaps Veteran
                  • Aug 2013
                  • 440
                  • UK
                  #5
                  Re: Samsung le40m86 main board issue.

                  Get a hair dryer and gently warm up the main processor then turn the Tv on, see what happens.

                  As to it switching off, this could be a caps issue, the hair dryer trick may help isolate your issue once again.
                  Last edited by Dang; 02-11-2015, 09:38 AM.

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