Samsung lcd 46" pd46b1qe_cdy blowing fuse

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  • spencer13
    Member
    • Jul 2015
    • 13
    • UK

    #1

    Samsung lcd 46" pd46b1qe_cdy blowing fuse

    Hi everyone hope somebody can help me? I'm having trouble with my Samsung lcd, the problem came from my electric tripping out at the main consumer box after some electric alterations for my shed.

    The TV wouldn't come on and I had the standby light flashing and a ticking noise like it wanted to start up but couldn't, I checked the capacitors and none were bulging or leaking but I replaced them anyway.

    After reinserting the power board and powering up the ceramic fuse blew with a big spark. This resulted in nothing happening and no standby light anymore.

    I bought a second hand board and inserted it and the fuse on the new board blew and took the green part at the side with it I think it's called a thermistor.

    Iv soldered the thermistor on my old board into the place of the blown one and tried again to insert the power, the fuse blew again but the the thermistor seems to have survived.

    I'm ok at soldering and like to give things a go myself before giving in and paying a bucket load of money to a repairer so can anyone tell my what the problem could be? I also have a voltage tester to hand so can do whatever is asked of me to get this TV working again!

    Thanks everyone for reading this and hope you can help me
    Spencer
  • spencer13
    Member
    • Jul 2015
    • 13
    • UK

    #2
    Re: Samsung lcd 46" pd46b1qe_cdy blowing fuse

    Added some pics of what I have
    Attached Files

    Comment

    • spencer13
      Member
      • Jul 2015
      • 13
      • UK

      #3
      Re: Samsung lcd 46" pd46b1qe_cdy blowing fuse

      And another
      Attached Files

      Comment

      • stj
        Great Sage 齊天大聖
        • Dec 2009
        • 31017
        • Albion

        #4
        Re: Samsung lcd 46" pd46b1qe_cdy blowing fuse

        your "new" board was faulty to begin with.


        the rectifier under the heatsink is probably shorted.
        check for shorts between any of those 4 wires you can see in the foto sticking out from under the heatsink.

        your old board was probably bad startup capacitors.

        Comment

        • spencer13
          Member
          • Jul 2015
          • 13
          • UK

          #5
          Re: Samsung lcd 46" pd46b1qe_cdy blowing fuse

          Hi stj, thanks for the help, do u have a pic of the part I need to be looking at? Sorry I'm bit of an amateur!

          Comment

          • spencer13
            Member
            • Jul 2015
            • 13
            • UK

            #6
            Re: Samsung lcd 46" pd46b1qe_cdy blowing fuse

            Is this the heat sink you mention?
            Attached Files

            Comment

            • spencer13
              Member
              • Jul 2015
              • 13
              • UK

              #7
              Re: Samsung lcd 46" pd46b1qe_cdy blowing fuse

              Been to my local maplin but they don't have the part, found it on eBay so I await the delivery. Do you think it's going to be just that part or more stuff need replacing?

              Comment

              • spencer13
                Member
                • Jul 2015
                • 13
                • UK

                #8
                Re: Samsung lcd 46" pd46b1qe_cdy blowing fuse

                Right, got the part, fitted it, blown again soon as the power supply plugged in with a massive blow. Any other ideas please anyone help ?

                Comment

                • stj
                  Great Sage 齊天大聖
                  • Dec 2009
                  • 31017
                  • Albion

                  #9
                  Re: Samsung lcd 46" pd46b1qe_cdy blowing fuse

                  dont you own a meter?

                  Comment

                  • spencer13
                    Member
                    • Jul 2015
                    • 13
                    • UK

                    #10
                    Re: Samsung lcd 46" pd46b1qe_cdy blowing fuse

                    Yes I do

                    Comment

                    • spencer13
                      Member
                      • Jul 2015
                      • 13
                      • UK

                      #11
                      Re: Samsung lcd 46" pd46b1qe_cdy blowing fuse

                      Not sure where to check stuff tho

                      Comment

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