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Old March 17th 06, 06:55 PM posted to alt.comp.hardware.pc-homebuilt
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Default PC won't turn on but not a power supply problem? Please Help....


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I'm completely stumped by this one - I have 2 old pentium III 1ghz
computers and I wanted to swap the power supplies over as one was
quieter than the other.

The only difference between the 2 power supplies was one was the new
one had a total output of 135w and the old one was 125w. I swapped
them over and it turned on and booted up for about 25 seconds but then
the screen went blank, the fan on the CPU stopped spinning and the only
activity was a green LED on the motherboard.

I turned the PC off and then it wouldn't turn on at all. I checked the
new power supply and the fan doesn't spin when I put the power cable
in, thus indicating I may have managed to kill it.

I have now put the old working Power supply back in and the fan spins
when power is attached but the pc won't turn on. Is there a fuse on
the motherboard I have may have blown? or have I blown the whole
motherboard? Any suggestions on what I should do?

Thanks in advance

Andi


OK, after donning my protective body armor, I think it's safe to point out
that it's quite common for a power supply to die and kill a mainboard in the
process. If it's any consolation, the power supply would have died soon
anyway, so you didn't kill it. -Dave