Gaurdall G-LCD19B

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  • sabre504
    Badcaps Veteran
    • May 2010
    • 449
    • United Kingdom

    #21
    Re: Gaurdall G-LCD19B

    Well the parts arrived fitted and still showing 1.95v.

    Just debating with myself whether the caps could be doing this as i seem to be getting voltage readings off the top of the caps (not sure if this is usual never done it before ).

    Comment

    • seanc
      Badcaps Legend
      • Nov 2008
      • 1319

      #22
      Re: Gaurdall G-LCD19B

      Ahah, you now have a location showing - you're somewhere near me

      So yes, the caps could be causing this problem.
      I had a 17" monitor with external 12v PSU, the monitor had gradually taken longer and longer to turn on, then wouldn't turn on at all.

      Investigated the PSU - putting out 12v as expected, tested with another just in case - still dead.

      Tested ESR of the small 100uf 16v caps, starting nearest the power jack - very high ESR.
      There were about 3 caps in parallel there, I changed those 3.
      Worked fine afterward

      Comment

      • sabre504
        Badcaps Veteran
        • May 2010
        • 449
        • United Kingdom

        #23
        Re: Gaurdall G-LCD19B

        Hi see you were near

        well think i might change them all got nothing to lose, but will hold off till tomorrow see if can find anything else with a bit of prodding about.
        Not holding out much hope as i think apart from caps have been thro everything apart from the chips

        Comment

        • seanc
          Badcaps Legend
          • Nov 2008
          • 1319

          #24
          Re: Gaurdall G-LCD19B

          Measure the voltage going across the cap above the VGA connector.

          Comment

          • sabre504
            Badcaps Veteran
            • May 2010
            • 449
            • United Kingdom

            #25
            Re: Gaurdall G-LCD19B

            Volts across legs 12.23

            Comment

            • sabre504
              Badcaps Veteran
              • May 2010
              • 449
              • United Kingdom

              #26
              Re: Gaurdall G-LCD19B

              Should have said
              all bigger caps are 16v 100uf
              3 small caps 16v 10uf

              Comment

              • seanc
                Badcaps Legend
                • Nov 2008
                • 1319

                #27
                Re: Gaurdall G-LCD19B

                Tried the caps above that, to the left and right of some sort of black component?

                Comment

                • sabre504
                  Badcaps Veteran
                  • May 2010
                  • 449
                  • United Kingdom

                  #28
                  Re: Gaurdall G-LCD19B

                  Thats a volt reg getting 4.99 on the 5v side and 3.3 on the other

                  Comment

                  • seanc
                    Badcaps Legend
                    • Nov 2008
                    • 1319

                    #29
                    Re: Gaurdall G-LCD19B

                    All sounds OK to me!

                    Comment

                    • sabre504
                      Badcaps Veteran
                      • May 2010
                      • 449
                      • United Kingdom

                      #30
                      Re: Gaurdall G-LCD19B

                      Yes all the volts appear right until you get to 1.8 regs.
                      So as i say try a change of caps start with the 16v 10uf.
                      Mind you am eyeing up the guts of my Xerox 19" wondering if i could rig them up in the casing if all else fails

                      Comment

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