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computer POSTS and then shuts down

rwalker1
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Last Modified: 2017-03-26
I have a 12 year old home built computer running winXP sp3 and a 1+0 Adaptec software RAID. Replaced Power supply with PC Cooling unit a couple of years ago. Have replaced several of the Seagate Cheetah drives as the machine runs 24x7. The other day the computer started up and shut down in 3 sec before I can enter the BIOS and without any beeps. I took out and replaced the battery to reset the CMOS. I can't find any obvious shorts. I doubt the power supply has gone bad, but I do have a tester, just haven't done it yet. Other suggestions?

I had this problem a year ago, but at that time it took 10-12 sec to shut down. At that time I removed, cleaned, reappied thermal paste and reinstalled the CPU which took care of the problem. Thanks.
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RaminTechnical Advisor
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Commented:
Test the power button on the front of your computer's case and also check connections.
Check for causes of electrical shorts , or defected power cable. replace cable, and retest.
dbruntonQuid, Me Anxius Sum?  Illegitimi non carborundum.
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Commented:
Suggestion only.

CPU fan gone?

Large desktop fan blowing into guts to keep air moving and see if that keeps it up and going.
Gary CaseRetired
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Question was properly answered;

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