power down problem

  • Thread starter Thread starter smorreale
  • Start date Start date
S

smorreale

Built an AMD socket am2 system. Ran fine for 3 days. Tried to turn it
on day 4 and it will not turn on. When I hit the case switch - all
fans spin (cpu, case, power supply) for 1 second and then system powers
off. There is no time for beeps, post, screen text, etc. If you
immediately hit the switch again, fans spin for 1/2 second and then
system powers off. Hit it again and fans barely move. Hit it again
and nothing at all. If I pull the plug from the power supply and plug
it back in, I can start the cycle over again - I get 1 second of fan
time again.

I bought a power supply tester and it tests OK. I bought a new
motherboard (exact model as old) and system acts exactly the same. I
patched in the case power switch and reset switch from an old case and
still no difference.

This may be coincidental, but the last action I performed on the
working system was copying data from a corrupt IDE hard drive. The
boot drive is a brand new SATA.

any ideas? - should I buy a new power supply (does tester really test
everything?) - could it be CPU or RAM or HD. What can cause instant
power down????
 
PSU regardless of the 'ok' test.
If you used the plug in tester it really doesn't 'load' the supply.
 
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