2 seconds to black with a twist

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  • sleepingciv
    New Member
    • Nov 2015
    • 9
    • USA

    #1

    2 seconds to black with a twist

    Ok i found this site via Google and read the post about 2 seconds to black.

    I have a Sanyo DP42848 tv. Got it for free because the guy said it had sound but screen went black.

    So got it home and tried it, and he was right turned on stayed on but 2 seconds later the screen went black, but tv stayed on.
    I read in the 2 seconds to black post that I might be able to see a image with a flashlight so I went and tried.
    I turned the tv on, and it stayed on....
    I played a dvd and just played.
    But it made a squeal sound. So thats my question the squeal sound. It last maybe a minute then goes away.. I left the tv on for an hour or so played and worked fine.
    so any ideas? It is a bit dusty so figured pop back off and blow it out.

    Heres a video with the squeal.

    https://www.youtube.com/watch?v=XAUT...ature=youtu.be
  • CapLeaker
    Leaking Member
    • Dec 2014
    • 8038
    • Canada

    #2
    Re: 2 seconds to black with a twist

    Any straight shot, high res pictures from all boards to go with it?

    Comment

    • comptek
      Badcaps Veteran
      • Aug 2013
      • 606
      • uk

      #3
      Re: 2 seconds to black with a twist

      top and lower showing dark lines looks like a few lamps have failed thats why the noise is there ?

      Last edited by comptek; 11-30-2015, 05:37 AM.

      Comment

      • sleepingciv
        New Member
        • Nov 2015
        • 9
        • USA

        #4
        Re: 2 seconds to black with a twist

        Originally posted by CapLeaker
        Any straight shot, high res pictures from all boards to go with it?
        No I don't. I can try and get some.

        Originally posted by comptek
        top and lower showing dark lines looks like a few lamps have failed thats why the noise is there ?

        Very possible I'll check into that I dint notice those

        Comment

        • sleepingciv
          New Member
          • Nov 2015
          • 9
          • USA

          #5
          Re: 2 seconds to black with a twist

          Ok here is a side shot. Can see like 3 lines. Can't see them looking straight at it tho.
          Also the squeal noise last only a few seconds this time.

          Comment

          • budm
            Badcaps Legend
            • Feb 2010
            • 40746
            • USA

            #6
            Re: 2 seconds to black with a twist

            It looks like some of the lamps are not on.
            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

            • sleepingciv
              New Member
              • Nov 2015
              • 9
              • USA

              #7
              Re: 2 seconds to black with a twist

              Originally posted by budm
              It looks like some of the lamps are not on.
              Are they expensive or hard to replace?

              Comment

              • budm
                Badcaps Legend
                • Feb 2010
                • 40746
                • USA

                #8
                Re: 2 seconds to black with a twist

                https://www.badcaps.net/forum/showth...=Sanyo+DP42848

                You can also search the thread by typing in 'SANYO DP42848'
                https://www.badcaps.net/forum/search...archid=5632307
                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

                • CapLeaker
                  Leaking Member
                  • Dec 2014
                  • 8038
                  • Canada

                  #9
                  Re: 2 seconds to black with a twist

                  could be a bad transformer on the inverter board too.

                  Comment

                  • sleepingciv
                    New Member
                    • Nov 2015
                    • 9
                    • USA

                    #10
                    Re: 2 seconds to black with a twist

                    Ok finally got some time to work on this tv. It went back to doing what it did before. Stays on for a second or 2 the no picture but tv stays on.
                    Tried to get good pics.







                    Comment

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