60PV450 bad YSUS?

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  • silicondt
    New Member
    • Mar 2016
    • 3
    • USA
    #1

    60PV450 bad YSUS?

    Hey all! I have a LG 60PV450 Plasma that stopped working.

    When you turn it on it clicks a few times, the red light comes on. Then it goes off. No video during this. The YSUS is also making a buzzing noise.

    I took the back off and tested a few things. If the YSUS is plugged into the power board, the voltages are not correct on VS-TP and VA-TP. BUT if I unplug the YSUS from the power board the voltages are good and stay on.

    The fuse on the YSUS was out so I re soldered another fuse (same fuse part) on but it still buzzes and no video.

    I also tried the test pattern by putting a paper clip in the 2 little holes on the control board and unplugging the blue ribbon cable. I got no test pattern.

    If the YSUS is bad would you get no test pattern no matter what?

    Also I tested the Y buffers for shorts and did not find any.
    Tags: None
    • sordids999
      Badcaps Legend
      • May 2013
      • 2155
      • uk
      #2
      Re: 60PV450 bad YSUS?

      Posting pictures of the back of your tv showing the boards with clear pictures may help you more with fixing your problem

        Comment

        • ReeceyBurger123
          Never Give Up !
          • May 2014
          • 7325
          • Britain
          #3
          Re: 60PV450 bad YSUS?

          Hi have you tried unplugging the top buffer and seeing it comes on with lower screen image ?
          Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !

          https://www.facebook.com/Telford-Tel...7894576335359/

            Comment

            • tech2014
              Badcaps Veteran
              • Aug 2014
              • 807
              • Canada
              #4
              Re: 60PV450 bad YSUS?

              I had a similar tv with buzzing coming from the YSUS. It was a crack on the panel. If you get the voltages with YSUS removed, its most likely the YSUS, or possibly a buffer board.

                Comment

                • silicondt
                  New Member
                  • Mar 2016
                  • 3
                  • USA
                  #5
                  Re: 60PV450 bad YSUS?

                  I took out both Y buffers and same thing. When the YSUS is plugged into the power board the voltages are wrong on VS-TP and VA-TP and buzzing on the YSUS. When I unplug it the voltages on VS-TP and VA-TP are good but no video either way.

                    Comment

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