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Samsung PN51D550C1F died, won't turn on, clicking

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    #1

    Samsung PN51D550C1F died, won't turn on, clicking

    Hi. My TV died right before my eyes. Just went black, flashing power light at front twice in a row constantly. Won't turn on at all.

    When tries to power up, it clicks five times, then stops trying.

    I am new to this, so please bear with me

    The vs-tp with y main unhooked is about 115 when multimeter is set to 500 DCV
    The va-tp with y main unhooked is about 35. Both of these decrease after initial plug in.

    Values are the same when x main is unplugged.

    Thanks for any assistance that you can render. Build was apparently Nov 2011. It has been ok till now, had to do some adjustment back in winter to get rid of purple banding that was occuring.

    Thanks.
    Tags: None
    #2
    Re: Samsung PN51D550C1F died, won't turn on, clicking

    Can you confirm if the screen flashes briefly when it tries to turn on?
    Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
    For service manual, schematic, boardview (board view), datasheet, cad - use our search.

    Comment

      #3
      Re: Samsung PN51D550C1F died, won't turn on, clicking

      No sir, I haven't seen that behavior. It simply seems to just click and then the front power light constantly does a double pulse. Thanks.

      Comment

        #4
        Re: Samsung PN51D550C1F died, won't turn on, clicking

        OK, can you provide some pictures of the power supply board, the Y-main board, and the X-main board?

        Power supply board - AC power connects to this
        Y-main board - On the left hand side of the TV looking from the rear
        X-main board - On the right hand side of the TV looking from the rear
        Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
        For service manual, schematic, boardview (board view), datasheet, cad - use our search.

        Comment

          #5
          Re: Samsung PN51D550C1F died, won't turn on, clicking

          ok will do when i get the chance. i cannot see any bulged caps or anything...

          Comment

            #6
            Re: Samsung PN51D550C1F died, won't turn on, clicking

            I'm looking for test points, mostly.
            Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
            For service manual, schematic, boardview (board view), datasheet, cad - use our search.

            Comment

              #7
              Re: Samsung PN51D550C1F died, won't turn on, clicking

              Here are the 3 boards, tom66. Thanks.
              Attached Files

              Comment

                #8
                Re: Samsung PN51D550C1F died, won't turn on, clicking

                OK there is a test point on the Y-main marked VSCAN... can you measure the voltage on this point (highest DC range or auto-ranging DC volts) using a digital multimeter. Place red probe on the point and black on the chassis. Note if it changes while powering up/clicking.
                Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                Comment

                  #9
                  Re: Samsung PN51D550C1F died, won't turn on, clicking

                  I have no movement whatsoever. The needle is still at 500DCV.
                  Last edited by ehboy; 09-03-2014, 04:57 PM. Reason: values

                  Comment

                    #10
                    Re: Samsung PN51D550C1F died, won't turn on, clicking

                    Fellow albertain !! What city are you in?
                    Also,I might have boards for this TV,got a couple of this model sitting here...
                    Proud owner of dozens of broken TV's and many,many,many boards.


                    Our website and passion:http://hollenhundshepherds.com/

                    Comment

                      #11
                      Re: Samsung PN51D550C1F died, won't turn on, clicking

                      tom66 would you happen to have any further ideas for this problem? Greatly appreciated.

                      Comment

                        #12
                        Re: Samsung PN51D550C1F died, won't turn on, clicking

                        Can you remove the Y-buffer board (connected to the Y-main) and see if the voltage on VSCAN rises
                        Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                        For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                        Comment

                          #13
                          Re: Samsung PN51D550C1F died, won't turn on, clicking

                          ok
                          Last edited by ehboy; 09-04-2014, 03:59 PM. Reason: edit

                          Comment

                            #14
                            Re: Samsung PN51D550C1F died, won't turn on, clicking

                            I get no movement on vscan at 500 dcv. There MIGHT be a slight movement, but it might be from vibration...

                            Comment

                              #15
                              Re: Samsung PN51D550C1F died, won't turn on, clicking

                              I'm guessing you are using an analog meter, is it possible you could borrow a digital one to confirm?
                              Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                              For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                              Comment

                                #16
                                Re: Samsung PN51D550C1F died, won't turn on, clicking

                                I don't know of anyone...I am certain now that I have redone it that there is no movement on the 500 dcv. I think it was me moving.

                                Comment

                                  #17
                                  Re: Samsung PN51D550C1F died, won't turn on, clicking

                                  I just joined here hoping to get some advice on this exact same situation. Wishing you luck

                                  Comment

                                    #18
                                    Re: Samsung PN51D550C1F died, won't turn on, clicking

                                    It would seem like your Y-main board is bad, then.
                                    Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                                    For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                                    Comment

                                      #19
                                      Re: Samsung PN51D550C1F died, won't turn on, clicking

                                      ok. so then i should order one seems like shopjimmy is out of stock...can you recommend another source at all? I really appreciate all of your help.

                                      Comment

                                        #20
                                        Re: Samsung PN51D550C1F died, won't turn on, clicking

                                        My part says revision number 1.5 Would the exact part with a 1.4 revision work?

                                        As well, on the UPC bar code, it says 764D. Does it have to have this exact same number, or would a 764A or 764B work?

                                        Anyone's advice is much appreciated. Thanks.

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