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news: oups.com...
> Hi,
>
> I came back from the weekend to find a dead computer. Had been hearning
> the CPU fan and meaning to check it out (replaced it a couple years
> back). In any case, opened it up, found the CPU fan pretty much locked
> up, and the PC wouldn't power up (hit power switch, lights would come
> on for about 1/2 second). Put on a spare one, which still spun OK, was
> just noisy and on it's way out. Still nothing. Went and bought a
> cheap Dynex power supply (300 watt, matched what was in there before).
> Now it powers up, but one of the Cd drive lights stays on, and the HDD
> light stays on. Really odd thing (to me, anyway) is that the thing
> surges, sounds like it's a car that someone's revving up and down.
> Plus - the CD and HDD lights brighten up when it revs up, along with
> the optical mouse light and (!!) the room lights! Husband thinks the
> motherboard is causing the problem, something shorting out and causing
> the revving. I'm wondering if I got a bad new power supply? Can a
> motherboard or processor cause the revving/surging?
>
> Things seemed OK until now except - sometimes I would get a reboot when
> not expecting it. But I was usually experiencing some software problem
> at the time, too.
>
> Any help would be appreciated! Since my laptop doesn't have newsgroups
> (yet) I'll have to wait for Google groups to catch up.
>
> TIA,
>
> Pat
Do the room lights normally dim and brighten only when the pc is on?
If so, it may be that the HDD or one of the CD drives is drawing too much power.
Try disconnecting the CD drives and see what happens.
If not, then that circuit is probably overloaded and the PC should be connected
to another circuit.
If you get your PC running fairly stable, download the HDD mfg's diagnostic
program and check your HDD.
A 300w PSU on a K7S5a is really pushing the lower limit.
If you feel comfortable, look for bulging (usually domed tops rather than flat
tops) or leaking capacitors on your motherboard.
They are the little cylinder like tubes on your MB. If you find one or more,
either have them replaced or do it yourself or ??
Since your cpu fan was not working, the cpu probably got really hot and maybe
messed up the thermal pad or heatsink compound between the cpu heatsink and the
cpu, thereby causing the cpu too run very hot. I would suggest that you remove
the cpu heatsink and clean the contact surfaces on it and the cpu (use Google
for help in doing this) and reinstall it with some heatsink compound.
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