looks like memory/processor problem.. One of the ways you can identify is that does it turn off when running intensive programs?? if so, find out which hardware it's using at the moment, if it's hard drive, you prob have a hard drive problem..
another thing, did you upgrade your system lately? if so, you better be careful of your power supply, as my last system fried because it can't supply enough power, my power supply literally burst into flames after about 3 monthes of upgrade.. and before that happened, it just freeze and shuts down randomly..
lisp hacker :D
running: FreeBSD 5.4 - still learning :D
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