Toshiba 37av500u screen flickering

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  • woodman45
    Senior Member
    • Aug 2015
    • 87
    • U.S.A

    #1

    Toshiba 37av500u screen flickering

    Hello as the title says I have a Toshiba 37av500u where the screen is flickering and what I mean is the screen lights up dimly and goes off in a one second interval and continuous until you unplug the power cord.
    The power button will not stop the flickering or blinking whatever you want to call it.i took the back panel off and did a visual inspection no bulging or blown caps.also can see the backlight going on and off.
    I have not checked anything yet with the multi meter,I have searched and seen maybe the master or slave inverter may cause this issue but figured I would ask for help here before proceeding on any testing.
    Attached Files
  • woodman45
    Senior Member
    • Aug 2015
    • 87
    • U.S.A

    #2
    Re: Toshiba 37av500u screen flickering

    Another pic
    Attached Files

    Comment

    • woodman45
      Senior Member
      • Aug 2015
      • 87
      • U.S.A

      #3
      Re: Toshiba 37av500u screen flickering

      Is there anywhere I can start testing.

      Comment

      • ReeceyBurger123
        Never Give Up !
        • May 2014
        • 7325
        • Britain

        #4
        Re: Toshiba 37av500u screen flickering

        24v ok ?
        Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !

        https://www.facebook.com/Telford-Tel...7894576335359/

        Comment

        • woodman45
          Senior Member
          • Aug 2015
          • 87
          • U.S.A

          #5
          Re: Toshiba 37av500u screen flickering

          Where do I check for the 24v?
          I'm a beginner I know how to use multi meter and test caps but I don't know exactly which board to start test.
          I thank you for any assistance and do want to learn instead of throwing parts at it.
          Last edited by woodman45; 02-20-2016, 05:00 PM.

          Comment

          • woodman45
            Senior Member
            • Aug 2015
            • 87
            • U.S.A

            #6
            Re: Toshiba 37av500u screen flickering

            Just to update I took a close look at power supply and tested all the 24v 12v & 5v pins on the board.the readings were very close or right on the money.such as all the 24v readings were 23.96 & 5v pins were 5.03 on my meter.
            So would it be safe to assume the problems lies within the master or slave inverter boards?
            If so is there any way to test them?
            Thanks for any help or suggestions as I would greatly appreciate them.
            I will include a couple pics of the power supply.

            Comment

            • woodman45
              Senior Member
              • Aug 2015
              • 87
              • U.S.A

              #7
              Re: Toshiba 37av500u screen flickering

              Here's a pic of the power supply
              Attached Files

              Comment

              • woodman45
                Senior Member
                • Aug 2015
                • 87
                • U.S.A

                #8
                Re: Toshiba 37av500u screen flickering

                Another close up of power supply
                Attached Files

                Comment

                • multimeter
                  Badcaps Veteran
                  • Jan 2011
                  • 739
                  • united kingdom

                  #9
                  Re: Toshiba 37av500u screen flickering

                  try re-soldering all the inverter transformers..
                  fixed so far...376 lg lcd tv's,24 onn tv;s,24 panasonic lcd,16 jvc lcd,12 marshall jcm800 amps,refurb of various disco equipment lighting,old style disco decks ,and a flymo!

                  ----------------------------------------------
                  please let us know if everything works ok if your tv gets fixed, as it will be and aid for anyone else having the same problem and wishing to fix it.it would save people clogging up this site with topics that are duplicated,and can be found easily using the search function.,and taking up valuable space.enjoy your fixed tv!,hopefully!

                  Comment

                  • woodman45
                    Senior Member
                    • Aug 2015
                    • 87
                    • U.S.A

                    #10
                    Re: Toshiba 37av500u screen flickering

                    Thanks for the reply. I will give it shot and post my results back in the next few days.

                    Comment

                    • woodman45
                      Senior Member
                      • Aug 2015
                      • 87
                      • U.S.A

                      #11
                      Re: Toshiba 37av500u screen flickering

                      Originally posted by multimeter
                      try re-soldering all the inverter transformers..
                      I resoldered all the transformers on the inverters and it's still doing the same.

                      Comment

                      • woodman45
                        Senior Member
                        • Aug 2015
                        • 87
                        • U.S.A

                        #12
                        Re: Toshiba 37av500u screen flickering

                        I replaced the master and slave inverters and still the same problem.does anyone have any suggestions or a service manual?
                        Im wondering if it could be a problem with power supply board?

                        Comment

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