Recapped but new problem

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  • strikkmoez
    New Member
    • Aug 2011
    • 1
    #1

    Recapped but new problem

    Hi, I have a Samsung syncmaster 930 and recently experienced the common problem of the flashing green light and monitor refusing to power up.

    After a visit to the forums here and some youtube videos, I bought tools and replaced 2 caps on the power board. I replaced the original 1000uF 16v 105dgr Samxon caps with 1000uF 25v 105dgr caps from NTE electronics. I've taken photos but Im on my friends computer and he doesn't have an unzip program so I can't post them. But the connections look decent.

    Anyway, the power problem seems resolved as it boots up(the monitor) nicely but now it doesn't receive a signal. It flashes from analog to digital a few times(little box in the upper left) then says No cable signal.

    Could this be caused by lack of power to the brain board in the monitor? and if so what would be the most likely causes of that? I've checked and rechecked all the wire connections and they SEEM ok, nice and snug.
    Tags: None
    • Uranium-235
      Comrade Glimmer
      • Aug 2007
      • 5042
      • US
      #2
      Re: Recapped but new problem

      you might want to consider going with a low ESR cap. Those NTE brands (like you get from radio shack) are more for electronic kits, not power supply replacement
      Cap Datasheet Depot: http://www.paullinebarger.net/DS/
      ^If you have datasheets not listed PM me

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        • PCBONEZ
          Grumpy Old Fart
          • Aug 2005
          • 10661
          • USA
          #3
          Re: Recapped but new problem

          NTE is not low ESR.
          The low ESR helps the caps send noise to ground.
          Noise is like that static sound when a radio isn't tuned to the station.
          The non-low ESR caps are leaving the noise in the power so all your IC chips are getting noisy power instead of a nice 'clean' DC.

          That might not be the whole problem but you aren't likely to find out with the wrong kind of caps in there.

          What series and diameter were the original caps?
          .
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