I have built a system like this:

- power supply: qtec silent 400W (new)
- case antec (old)
- motherboard asus cusi-m (old)
- cpu via nemehiah 1 ghz (old)





I used it a bit then I was busy for work and I have not used it for two
months.

Now I use it, it works, but some times it randomly powers off.
I am in the bios or under linux, doing nothing or at full load: it power
off. I have to detach power cord to be able to power on again.

Power supply seems good, I have tried on another computer.
Ram seems good: I have some spare dimms and I tried them all.

Power down happens also without hdd and cdrom.

What can it be?

Thanks in advance for any reply!!!!

Mario Giammarco wrote:
It could probably be lots of things. My guess is one of the fan
connectors is loose and it "thinks" it's sensing a fan failure.

Or perhaps a fan really _has_ failed and it's overheating.

Another possibility is a bit of solder flash, or a screw head somewhere
is shorting something intermittently. Thermal or mechanical stress
could make that show up after a period of months. I'd probably go
through and re-seat all connectors and visually check all mounting
screws.

Of course, it could also be a component failure of some sort. Check for
bulging or leaking capacitors on the motherboard.

Given that the power supply is new, it's suspect, too.

--
The e-mail address in our reply-to line is reversed in an attempt to
minimize spam. Our true address is of the form che... (AT) prodigy (DOT) net.