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8938Re: [NTO] Next peculiar computer problem

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  • Axel Berger
    Oct 6, 2010
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      loro wrote:
      > It takes ages for it to power on.

      This is a simple and common problem. The regulation and switching in
      your power supply unit is powered from the seondary low-voltage side
      creating a hen and egg problem on switching on. There is a big high
      resistance resistor from the primary to the secondary side bootstrapping
      the process with a very ow current. This resistor ages and becomes
      non-conducting.

      > I have all my gear plugged into two power bars with switches,
      That proves it. In pure standby aka soft-off that part would stay
      powered. It is quite common for power supplies that have worked
      faultlessly for years not to restart after a blown fuse or a power
      outage.

      This problem is supposed to be very easy to fix. In practice I have
      failed to find that resistor in faulty units and after some time have
      given up rsorting to the easy solution of getting an inexpensive (not
      outrightly cheap) new one.

      Axel
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