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Little help with lg plasma 50pk540 please?

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    #1

    Little help with lg plasma 50pk540 please?

    Hi yall. I have a bit of a problem with my lg 50pk540. It powers up and atays on but this mess is all i get instead of a picture. I hope the pic i attached shows up. Thanks in advance for any help.
    Attached Files
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    #2
    Re: Little help with lg plasma 50pk540 please?

    Looks like multiple problems starting with lower buffer board or whacked ysus.

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      #3
      Re: Little help with lg plasma 50pk540 please?

      If its multiple problems but still powers up, Could that be a lightning hit? Or one of the kids knocking the tv over and not telling me? With the power board good should i start replacing the other boards or just sell the power board and junk the rest?

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        #4
        Re: Little help with lg plasma 50pk540 please?

        Here is a second pic if that helps any.
        Attached Files

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          #5
          Re: Little help with lg plasma 50pk540 please?

          Whats been done to set between the first and second picture...?
          TELEFIX

          How PLASMA SCREENS WORK, X-SUS and Y-SUS what they do--
          http://www.irf.com/technical-info/appnotes/an-1088.pdf
          PLEASE DO NOT EMAIL ME PRIVATELY FOR REPAIR ADVICE. QUESTIONS BELONG ON THE FORUM!

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            #6
            Re: Little help with lg plasma 50pk540 please?

            The up and down blur follows where the lg logo bounces around the screen. The wole screen blur is when i hit any button and the lg screen saver goes away.

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              #7
              Re: Little help with lg plasma 50pk540 please?

              I've seen something similar on another lg plasma. It was the mosfets on the buffer boards. Post pics of each board inside your set.

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                #8
                Re: Little help with lg plasma 50pk540 please?

                Originally posted by mmartell View Post
                I've seen something similar on another lg plasma. It was the mosfets on the buffer boards. Post pics of each board inside your set.
                Ive added pics of the boards.
                Attached Files

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                  #9
                  Re: Little help with lg plasma 50pk540 please?

                  2
                  Attached Files

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                    #10
                    Re: Little help with lg plasma 50pk540 please?

                    3
                    Attached Files

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                      #11
                      Re: Little help with lg plasma 50pk540 please?

                      Im not seeing any out of place on the boards.
                      Attached Files

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                        #12
                        Re: Little help with lg plasma 50pk540 please?

                        On picture 3

                        You see 2 resistors marked -Vy and vsc.

                        Please measure across this resistors and post the voltage.

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                          #13
                          Re: Little help with lg plasma 50pk540 please?

                          I will as soon as a get back home. Thanks.

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