LG 60PY3DF - problem colored lines in both directions and blinking red spots

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  • pinwheel
    New Member
    • Apr 2014
    • 4
    • USA
    #1

    LG 60PY3DF - problem colored lines in both directions and blinking red spots

    I have a LG 60PY3DF that I got from my recycling center. It had sound but no picture and researching that I ended up replacing the large board on the left side with 6 heat sinks. That brought back some sort of picture but not images from the input dvd player. Now it is showing multi colored lines around the screen with dividing lines.

    These appear without any input source but the color is more bland.

    I have sound and the power seems to be ok over time.

    I have posted 2 photos.

    Any help here is appreciated.
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    • SlickClick
      Senior Member
      • May 2011
      • 91
      #2
      Re: LG 60PY3DF - problem colored lines in both directions and blinking red spots

      Funny I just picked up a 60pc1d-ue with a similar issue... When I turn mine on i get a top to bottom stripe; this is where it is showing the screen saver logo i assume...

      when I put a source to it i get half the screen all crazy colors and the other half trying to display the image; sound is fine...

      I suspect it is an issue with either the y-buffers, y-main, or z-sys...
      Im downloading the service manual now to go from there... so far no blown fuses on any of the y or z boards; however i did find one bad/top bulge cap on the power board which I replaced already...

      looking at it again though before posting i am gonna say the 4 IPMs is the issue and swap em out; but i did read somewhere else it could be some caps on the y-main on the small upright board... I cant verify this for sure yet...

        Comment

        • tom66
          EVs Rule
          • Apr 2011
          • 32560
          • UK
          #3
          Re: LG 60PY3DF - problem colored lines in both directions and blinking red spots

          Likely bad buffers. Could be a Y-sustain fault. I doubt it is a Z-sustain fault.

          Most likely Vscan voltage to the buffers is bad. If the panel is steady and not flickering the IPMs are probably OK. Check Vsc should be about 140 to 150V.
          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

            • SlickClick
              Senior Member
              • May 2011
              • 91
              #4
              Re: LG 60PY3DF - problem colored lines in both directions and blinking red spots

              I checked the resistor R60-Vsc one side of the resistor is 116v and the other side is 6v... =| LoL

              I tested voltage to/on the y-buffer boards on the 15v legs of the P1 and P2 connectors on the y buffers I get 22v.

              Vs and Va match panel specs at 194.# to panel 193 and 60v to 60v on ymain.

              update:
              After noticing the split voltages on R60 i started to test other resistors and several are open... =| hmmmmm hows this thing even working a little bit still is beyond me lol
              Last edited by SlickClick; 04-28-2014, 07:47 PM.

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