LG LC550WUD flickering picture

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  • tryingtofix
    New Member
    • Oct 2017
    • 4
    • Norway
    #1

    LG LC550WUD flickering picture

    I have an LG LC550WUD which looks like it's an industrial open frame monitor. It just has VGA and DVI inputs, no tuner or HDMI.

    The picture has a problem which is difficult to explain, it looks like it jumps or flickers. Here is a YouTube video showing it:
    https://youtu.be/jhpLEZYYBAM?t=1m53s

    There are six PCBs behind the panel. I have changed all the electrolytic capacitors on the large main PCB, but that didn't make any difference. It looks like it would be very difficult to change the capacitors on the other PCBs.

    I would appreciate any hints what could be wrong! I can post pictures of all the PCBs if that can help.
    Tags: None
    • dskall
      Badcaps Legend
      • Oct 2016
      • 2905
      • usa
      #2
      Re: LG LC550WUD flickering picture

      I would be wiggling cables and connections. Tapping boards to see if it affects picture
      I assume no responsibility for any stupid suggestions I might post.

        Comment

        • tryingtofix
          New Member
          • Oct 2017
          • 4
          • Norway
          #3
          Re: LG LC550WUD flickering picture

          Thank you! I will try that. I disconnected most of the connectors when I replaced the capacitors on the main board, though.

            Comment

            • dskall
              Badcaps Legend
              • Oct 2016
              • 2905
              • usa
              #4
              Re: LG LC550WUD flickering picture

              Especially around t-con
              I assume no responsibility for any stupid suggestions I might post.

                Comment

                • tryingtofix
                  New Member
                  • Oct 2017
                  • 4
                  • Norway
                  #5
                  Re: LG LC550WUD flickering picture

                  Thanks! I'll let you know how it goes.

                    Comment

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