Toshiba 37AV52U no image

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  • Malachi
    Badcaps Legend
    • Dec 2015
    • 1077
    • Usa

    #1

    Toshiba 37AV52U no image

    I usually avoid tvs that aren't plasma but I picked up this lcd for free yesterday.
    I can see an image on screen if I shine a flashlight on it.
    How do I determine if it's a bulb issue or inverter issue?
    Thanks.
  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA

    #2
    Re: Toshiba 37AV52U no image

    You can start by providing good clear pictures of the whole backside of the TV showing all the boards so we can see what we are dealing with.
    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

    • Malachi
      Badcaps Legend
      • Dec 2015
      • 1077
      • Usa

      #3
      Re: Toshiba 37AV52U no image

      Somehow I knew you’d say that. Lol.
      I was hoping you’d be able to say “it’s the cfl bulbs” in that case I would throw it away and not even bother taking it apart.

      Comment

      • R_J
        Badcaps Legend
        • Jun 2012
        • 9535
        • Canada

        #4
        Re: Toshiba 37AV52U no image

        Look at the two caps on the inverter, are they bulged? check the fuse, F1. look at the top of the ic, does it loo like it is cracked, or does a pin on the ic look over heated.
        Last edited by R_J; 10-03-2019, 12:02 PM.

        Comment

        • Malachi
          Badcaps Legend
          • Dec 2015
          • 1077
          • Usa

          #5
          Re: Toshiba 37AV52U no image

          I will do all that when I open it up this evening. It’s getting to be almost not cost effective to even open up anything smaller than a 50”.

          Comment

          • Malachi
            Badcaps Legend
            • Dec 2015
            • 1077
            • Usa

            #6
            Re: Toshiba 37AV52U no image

            Here are the pictures. I can upload one if the inverter from shopjimmy if you want better detail.
            Everything looks fine to me.
            Attached Files
            Last edited by Malachi; 10-03-2019, 01:24 PM.

            Comment

            • R_J
              Badcaps Legend
              • Jun 2012
              • 9535
              • Canada

              #7
              Re: Toshiba 37AV52U no image

              There is a small led on the inverter, when you first turn on the tv it should light up then fade out

              Comment

              • Malachi
                Badcaps Legend
                • Dec 2015
                • 1077
                • Usa

                #8
                Re: Toshiba 37AV52U no image

                It flashed a couple of times then stopped.
                Last edited by Malachi; 10-03-2019, 03:34 PM.

                Comment

                • Malachi
                  Badcaps Legend
                  • Dec 2015
                  • 1077
                  • Usa

                  #9
                  Re: Toshiba 37AV52U no image

                  Now the tv works. All I did was remove the inverter and reinstall it.

                  Comment

                  • petehall347
                    Badcaps Legend
                    • Jan 2015
                    • 4426
                    • United Kingdom

                    #10
                    Re: Toshiba 37AV52U no image

                    loose or corroded connectors

                    Comment

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