[Gllug] ATX power supply up the spout?

Chris Bell chrisbell at overview.demon.co.uk
Sat Sep 25 14:42:30 UTC 2004

On Sat 25 Sep, John Winters wrote:
> My power workstation (800 MHz Duron!) suddenly won't turn on.  If you
> take the lid off, connect a power lead, wait 30 seconds and then press
> the power button the CPU fan turns about 1/10 of a rotation.  Then sod
> all else happens.  My best guess is that the PSU has turned up its
> toes.  Any other suggestions before I order a new one?
> TIA,
> John
   It could be so many things, including a dirty internal fuseholder, a dry
joint, an excessive load...
   Switch mode PSU's can go overvoltage and destroy themselves if powered
without a load, usually about 10% of maximum, so I connect some dead hard
drives during testing. ATX PSU's will normally start immediately if the
motherboard is not connected, so watch the PSU fan and listen to the drives.

Chris Bell

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