Small Monitor PSU is it worth tryingto mend it ?

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  • ceedy
    Senior Member
    • Nov 2008
    • 76
    #1

    Small Monitor PSU is it worth tryingto mend it ?

    My Grandson was give a Flat Screen Montor to replace his old CRt ..

    Asked me to collect it and check it over ..

    Did so last night , all seemd to work very well ..and free!!!

    After using it for about 2 hours, playing around as a dual Screen. Switched it off , unplugged the small12v brick PSU. Picked up the PSU and it gave a Loud ( arcing type) crack!! .
    Checked output with meter ... nothing!! m found it now rattled ??.
    Took it apart and found both pcb mounting screws loose inside.
    Looks like its been fiddled with before ?? . Replaced PCB fuse and it all powers up ok.with no drama.
    But put it under load and it just clicks steadily and the led flashes ..
    Is it worth bothering with ?

    [/IMG]

    [/IMG]

    Chris..
    Tags: None
    • ceedy
      Senior Member
      • Nov 2008
      • 76
      #2
      Re: Small Monitor PSU is it worth tryingto mend it ?

      Looks like one of the loose screws has caused a direct Short between the top of the mains input Fuse ( 240volts) and the Aluminium Heatsink.

      What components that could damage is a bit outside my comfort zone!!

      Chris

        Comment

        • ben7
          Capaholic
          • Jan 2011
          • 4059
          • USA
          #3
          Re: Small Monitor PSU is it worth tryingto mend it ?

          Originally posted by ceedy
          Looks like one of the loose screws has caused a direct Short between the top of the mains input Fuse ( 240volts) and the Aluminium Heatsink.

          What components that could damage is a bit outside my comfort zone!!

          Chris
          I know what the problem is, bad caps. The fuse likely blew from being shorted directly across the mains.

          I do see a small capacitor in the middle of the board, it looks bulged. I recommend you replace all the capacitors
          Muh-soggy-knee

            Comment

            • ceedy
              Senior Member
              • Nov 2008
              • 76
              #4
              Re: Small Monitor PSU is it worth tryingto mend it ?

              Originally posted by ben7
              I know what the problem is, bad caps. The fuse likely blew from being shorted directly across the mains.

              I do see a small capacitor in the middle of the board, it looks bulged. I recommend you replace all the capacitors
              Will do that, need something to do whilst its raining and can't get on with putting a walnut dashboard in my Car..

              Chris

                Comment

                • ceedy
                  Senior Member
                  • Nov 2008
                  • 76
                  #5
                  Re: Small Monitor PSU is it worth tryingto mend it ?

                  Been at it at last .. ( life getting in the way)

                  There are no dodgy looking caps . in fact can't find anything that visually looks
                  worrying!! .

                  wot now!! bin it and just buy another! there are a few Chinese varities on fleabay.?

                  Switched mode is outside my happy areas!! but my walnut Dash looks the Biz !!

                  Chris

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