strange hardware problem

[Zbigniew Koziol]

The machine is running RedHat 9. Pentium III. It reports itself as
GenuineIntel
in /proc/cpuinfo. It is not heavily used. Top shows mostly 99.8 % of idle
CPU
as well a lot of free memory.

It is used as a test server, visible also from the Internet.

It just shuts down itself. In the sense that there is no access to it by
ssh,
it does not respond to mouse or keybord. This happens more and more often,
recentely every 15 minutes.

There is no any usefull info in log files (or at least I can not find it).

May be someone could perhaps suggest how to approach this problem, how to
solve it?
How to find out what causes it?

We checked the BIOS, apmd is not running.

zb.
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