Diagnosing periodic reboot?

[Nikolas Britton]

On 6/30/05, David Kurtz <davidkurtz at mac.com> wrote:
> My hobby FreeBSD box has started to reboot at semi-regular intervals,
> and I can't figure out why.
> 
> There seems to be no warning, no message at the console and no
> indication of (or, probably, I don't recognize) the problem at reboot.
> 
> This happened a few months ago, and for some reason I deduced that
> the computer was getting too hot. I installed a better fan, and that
> seemed to do it.
> 
> Now it's happening again, and I'm not sure I can blame heat.
> 
> What log files should I be looking at?
> 
> (BTW, hardware is a Shuttle SB51G enclosure with a 2GHz Intel
> Celeron, circa Jan. 2003)
> 

Random reboots...

Substandard power supply, power supply that has too much load on it,
and/or power good signal is flaky.

Substandard memory, bad chip, etc.
Rotate the memory like you would car tires and see what happens.