Power Supply?

[CompuDocs]

I replaced an ATX PS on a Packard Bell 640 a couple of months ago. So far it's been ok up till today when I got the call that the PC isn't booting up. Cust. said that in the last week it would go into suspend all by itself a few times, shut down by itself a few times now it won't boot at all. When I pull the cmos battery, it will start for about 4-5 seconds, then shut back down.

Another bad PS?
Incorrectly flashed BIOS?
Bad Motherboard?
Bad CPU? (Celeron 266)
Bad RAM?

I've had all peripherals pulled off the board and the PS.

Any ideas?

Thanks in advance

Charlie

[JeanneD]

have you checked to make sure something's not shorting out like the board to the case, the switch or a screw or something under the board? Something similar happened to my sister then she found a screw jammed under the motherbd guess not bad enough to kill it completely for awhile till it moved some more, replaced 2 PS, then the board finally fried thats when she saw it

[Jman]

Well I blame it on something overheating (cpu) or just because PB suck!