LG MU-42PM12X Issues

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  • Hacksword
    New Member
    • Jan 2011
    • 2
    #1

    LG MU-42PM12X Issues

    Hi all, first I would like to say... NICE FORUM! Was just trolling the interwebs and stumbled on this. I am working on an LG set as the title suggests. Basically, I have 6 of these identical sets that are all doing the same thing. The set starts up fine, however after about 30 seconds, you notice that there are lines throughout the picture, horizontal lines that flash and flicker and move all about the screen. I decided to dissect one of the sets since I have so many of them and see whats going on. I have adjusted the Va and Vs pots slightly, and the Va pot made the sparkle in the lines a lot less noticeable. However when I adjusted the Vs pot, just a tiny bit mind you... The set went into standby mode and will not come out. I get the red light on the mainboard and the red light on the outside of the set, but that is it. Any suggestions, I just want to play around with these, but I also dont want to brick another if that is what I did here.

    Thanks in advance for any advise.

    -Hacksword
    Tags: None
    • retiredcaps
      Badcaps Legend
      • Apr 2010
      • 9271
      #2
      Re: LG MU-42PM12X Issues

      Originally posted by Hacksword
      Any suggestions,
      Look for a service manual at

      http://elektrotanya.com/
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        Comment

        • Hacksword
          New Member
          • Jan 2011
          • 2
          #3
          Re: LG MU-42PM12X Issues

          Thanks, I just got the manual, I will begin troubleshooting

            Comment

            • jeffrey.r.jones
              New Member
              • Jul 2012
              • 3
              • USA
              #4
              Re: LG MU-42PM12X Issues

              Did you ever get anywhere with these? I just picked one up. Has blotchy picture. Going to check voltages first and go from there but would love some help. No lines or anything. Some sparkles and blotchy on faces and action scenes.

                Comment

                • tom66
                  EVs Rule
                  • Apr 2011
                  • 32560
                  • UK
                  #5
                  Re: LG MU-42PM12X Issues

                  Above, possibly Z-sustain.
                  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

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