samsung UE40EH6030WXXN not working

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  • anno
    Senior Member
    • Sep 2007
    • 140
    • netherlands
    #1

    samsung UE40EH6030WXXN not working

    i have a samsung UE40EH6030WXXN that is not working. led blinked 4 times.
    i changed the power supply BN44-00552A but still the tv is not working.

    the power led is blinking 4 times (if i`m correct)
    the ps-on signal is coming to 3.3v , the psu voltages are correct. But then the ps-on signal is going to 0v. When i disconnect the TCON cable from the mainboard the ps-on signal is staying stable at 3.3v . But nothing happens. no backlight or image.

    i tried to find a short on the TCON . I connect 12v external power supply to the fuse of tcon, but there is no short. it is taking 200ma.

    mainboard is bn41-01894a
    anyone can help?
    Tags: None
    • paulstef
      Badcaps Veteran
      • Dec 2013
      • 724
      • Canada
      #2
      Re: samsung UE40EH6030WXXN not working

      If you had an oscilloscope you could measure output voltage on the PSU LED connector. I had a few of these TVs with burnt LEDs.

        Comment

        • dick_barton
          Badcaps Legend
          • Aug 2015
          • 6643
          • Wales
          #3
          Re: samsung UE40EH6030WXXN not working

          Have you checked the Tcon fuse is OK and not open circuit?

          Edit
          Sorry, not open if current flowing. Have you checked any voltages on the Tcon board which may be marked eg VCC_1.2V, HVIN_12V, HAVDD, AVDD etc
          Last edited by dick_barton; 09-22-2017, 05:47 AM.
          Willing to help but I'm no expert.

            Comment

            • anno
              Senior Member
              • Sep 2007
              • 140
              • netherlands
              #4
              Re: samsung UE40EH6030WXXN not working

              The Tcon fuse is ok. How to check the PSU LED connector. i have a scope.
              which pins i have to check?

                Comment

                • dskall
                  Badcaps Legend
                  • Oct 2016
                  • 2905
                  • usa
                  #5
                  Re: samsung UE40EH6030WXXN not working

                  I would be checking for the various voltages on t-con
                  I assume no responsibility for any stupid suggestions I might post.

                    Comment

                    • riogrande75
                      New Member
                      • May 2010
                      • 1
                      #6
                      Re: samsung UE40EH6030WXXN not working

                      Hi!
                      I know its quite a long time ago, but I just ask: Do you still have a close picture of the mainboard (BN41-01894A)? I need to know the type of IC 204 near the connector to the power supply board.
                      Thx,
                      Rio

                        Comment

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