Computer shutting down

Wonder if anyone can help me? My problem is that my computer seems to
be shutting itself down and then giving off a siren type beep (have to
unplug power to stop it). For the most part, it seems to do it
randomly, yet at others it seems to do it at the same point of a
programs operation (like today for instance, where it shut down at a
similar point whilst trying to run an antivrus scan).

At first I thought it was overheating, but looking in the bios shows
its not going much higher than 50c for the cpu and around 35 for the
case temp. It also seems to do it sometimes after a cold boot as well.

I've had the same setup for over a year now with no problems, and has
only recently started doing this, so I'm wondering if it is the power
supply that is finally giving up.

Any suggestions?

Cheers.

Specs are:
XP2500
NF7-S
GF4 TI4200
512mb Twinmoss DDR RAM
300W AOpen PSU

that alarm is indicating a temperature issue but also sounds off for a
voltage problem. looking at what the bios says the temperature is is not a
good indicator. you really need something like Motherboard Monitor (MBM)
running to monitor temps while under a load from whatever it is that you use
the system for (gaming, whatever...)

my first guess would be an overheating issue... have you opened things up
and checked for dust buildup in fans and such? I usually clean my systems
out a couple of times a year... another issue could be that you have
developed some sort of issue with the heat sink and/or cooling fan for the
heat sink. you might want to check and be sure that the fan is not slowing
down or something like that and possibly remount the heat sink to the CPU.
if a thermal pad was used to interface the heat sink and CPU, get rid of the
pad and use some good quality heat sink lube.

--

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Network+ certified

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"Precizion" <> wrote in message
news: ups.com...
> Wonder if anyone can help me? My problem is that my computer seems to
> be shutting itself down and then giving off a siren type beep (have to
> unplug power to stop it). For the most part, it seems to do it
> randomly, yet at others it seems to do it at the same point of a
> programs operation (like today for instance, where it shut down at a
> similar point whilst trying to run an antivrus scan).
>
> At first I thought it was overheating, but looking in the bios shows
> its not going much higher than 50c for the cpu and around 35 for the
> case temp. It also seems to do it sometimes after a cold boot as well.
>
> I've had the same setup for over a year now with no problems, and has
> only recently started doing this, so I'm wondering if it is the power
> supply that is finally giving up.
>
> Any suggestions?
>
> Cheers.
>
> Specs are:
> XP2500
> NF7-S
> GF4 TI4200
> 512mb Twinmoss DDR RAM
> 300W AOpen PSU
>