Plasma tv 60PM9700 no video has backlight

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  • taft1957
    Senior Member
    • Oct 2013
    • 95
    • USA
    #1

    Plasma tv 60PM9700 no video has backlight

    NO video, no OSD, has backlight. Can't seem to locate a schematic. I am leaning toward the main board but don't really know. Would love to get to the place where I can do component level repair on a SMD main board. The T-Con board at location D101 this diode is flashing. ONe long, one short, one long, one short. anyone know what that means?
    power led does blink twice, when you first turn the tv on.
    Last edited by taft1957; 11-05-2016, 01:12 AM. Reason: added informtion
    Tags: None
    • Nick's Tvs
      Badcaps Veteran
      • Jan 2014
      • 621
      • USA
      #2
      Re: Plasma tv 60PM9700 no video has backlight

      Could be bad sustain boards, bad buffers, or a bad Logic board. This is a plasma TV so what you are referring as the T-con is actually called a logic board.
      We are going to need a lot more information about your symptoms and your TV in order to figure out what is going on here. Do you have a multimeter available to you, and do you know how to take voltage measurements with it safely?
      If you can post pictures of your set with the back cover taken off, that would be a huge help as well.

        Comment

        • taft1957
          Senior Member
          • Oct 2013
          • 95
          • USA
          #3
          Re: Plasma tv 60PM9700 no video has backlight

          Thanks again for the information. Never knew it wasn't called a Tcon on a Plasma. I just asked you that question in a private message regarding the other information that you sent me. For years I thought a Plasma tv had a backlight, and was like a lcd tv. Plasma tv is really a different kind if animal isn't it. I will take some voltage measurements and get back to you.

            Comment

            • taft1957
              Senior Member
              • Oct 2013
              • 95
              • USA
              #4
              Re: Plasma tv 60PM9700 no video has backlight

              OK I took some pictures but they suck. Power supply to YSUS pin1 205
              pin2 205
              pin 6 55.0
              pin 7 5.0
              Took voltages on each board
              Main Power supply Main board from PS P1100 pin 1 17.4
              pin 3 5.1
              pin 4 5.1
              pin 7 5.1
              pin 8 3.3
              pin 9 3.3
              VA test point 55.6 Main Board P901
              VS test point 206.6 pin 1 3.3
              pin 2 3.3
              pin 4 3.29
              pin 7 3.24
              Power supply to Zsus P167

              VS 205.6
              VS 205.6
              VA 55.1
              pin 7 5.1 Power Supply PB13 pin 1= 17.1 pin 4= 5.18 pin 7= 5.1 pin 9= 3.3

              Small logic board going to panel P222 pin 2= 3.3 pin 3= 3.3 pin 5 =3.3 pin 6 =3.3 pin 8=3.3 pin 11=4.9 pin 12 =4.9 IC253 has 4.9 and 3.3 X101 has 1.8 L102=1.5

                Comment

                • taft1957
                  Senior Member
                  • Oct 2013
                  • 95
                  • USA
                  #5
                  Re: Plasma tv 60PM9700 no video has backlight

                  Here are the pictures
                  Attached Files

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