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samsung Un50h5203afxza nh03 no backlight

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    samsung Un50h5203afxza nh03 no backlight

    no backlight at all
    flashlight shows tv image and has sound
    caps visually look good, no doming, no leaking
    i only have a multimeter, no sophisticated testing equipment.
    ideas..?

    #2
    Re: samsung Un50h5203afxza nh03 no backlight

    Usual request is good clear pics. of each board and one of the whole layout.
    Quit due to disrespect from unpaid sta,ff.

    Comment


      #3
      Re: samsung Un50h5203afxza nh03 no backlight

      https://www.youtube.com/watch?v=4v8DcqCNG4A video of power supply board testing, use CAUTION HIGH VOLTAGE CAN BE DEADLY.
      Quit due to disrespect from unpaid sta,ff.

      Comment


        #4
        Re: samsung Un50h5203afxza nh03 no backlight

        i can't seem to upload the pictures, so i put all the pictures in a shared folder on google and here is the link

        https://photos.app.goo.gl/feOEqRYjkxoolE5j1

        Comment


          #5
          Re: samsung Un50h5203afxza nh03 no backlight

          I can see that the LED backlights power supply section got really hot there, the board turns dark brown, right by the LED connector, you need to check the Diodes in that section where it gets very hot.
          You know how to use your meter properly, right?
          You also need to provide straight shot pictures of the whole top and bottom side of that power supply board.
          What is your power supply board P/N? BN44-?????
          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


            #6
            Re: samsung Un50h5203afxza nh03 no backlight

            Bn44-00772a

            Comment


              #7
              Re: samsung Un50h5203afxza nh03 no backlight

              BTW, try disconnecting the cable between the min board and the power supply board and then plug the power cord into the outlet to see if the backlights will come on right away and stay on as long as the power cord is plugged into the outlet.
              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

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