hi my 2nd computer i built in 04, i recently installed a new seagate hd. 120 gb.s ata 133 as last hd. failed. ok so new hd. installed in jan.07 now it
shuts down after maybe 10-20 min.s online i know heat is the issue here.
but maybe motherboard is bad? im runnin windows xp pro, sp2
computer consists of, amd athlon 2800+, new ultra 550 w psu (installed 6-06) mb=shuttle an35,ultra
512 mb. pc2700, chaintech 440 8x agp video card. im certain cpu fan is operational, 2 tower fans operational, psu fans operational. any help would
be apreciated just where do i start?

Everest has a good temp and voltage display -

http://www.majorgeeks.com/download.php?det=4181

edit:

Interesting 'blog' type article mentions a primary IDE problem with 2 drives:

http://www.vtc.net/~cdgoldin/caveat/shuttlean35.htm

downloaded everest come up with temps of mb-104f--109f
cpu-135f-147f pwm104f--109f computer ran for 1 hour and 22 min.s
after which screen showed --full screen msg. windows encountered a prob. needs to shut down. than tried to restart itself than blew circuit breaker
on psu, after a few min.s i reset circuit breaker, powered up but no screen
just loud spinning sound coming from hard drive. dead screen

update to last post it was cd rom drive spinning at very high speed. unplugged it, removed cpu fan cleaned heat sink fins, switched voltage from 220v to 110 restarted and got lower cpu temps-45c (113f) good so far.