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Posted: 4/15/2006 9:56:00 AM EST
The screen goes black and it restarts like it had completely lost power except when it really does lose power it doesn't start back up on it's own.
Link Posted: 4/15/2006 10:08:53 AM EST
HdWare failure, start with memory
Link Posted: 4/15/2006 10:13:55 AM EST
check power supply, and CPU temps as well.
Link Posted: 4/15/2006 10:16:15 AM EST
Yep, sounds like an overheating problem. clean out the case and fans if you haven't lately.
Link Posted: 4/15/2006 10:16:52 AM EST
check your event log
Link Posted: 4/15/2006 10:21:42 AM EST
Windows XP ?

If so , check your services to see if one of them is set to restart...
Link Posted: 4/15/2006 10:33:30 AM EST
Link Posted: 4/15/2006 1:59:37 PM EST
depends on how old it is. There was a bad batch of caps about 3 or 4 years ago. Most of mine started going last year, but it depends on how long the computer is on.
Link Posted: 4/15/2006 2:06:02 PM EST
download speedfan and see what your cpu temp is at

Do you have an internal speaker? Some modern mobos will give you audible alarms for overheating and other things.

Link Posted: 4/15/2006 2:20:14 PM EST
It really does sound like heat. Make sure all the fans are turning and blow out any dust with some compressed air. Although it could be something (faulty switch or a short somewhere) sending a reset signal to the motherboard too. When you check the fans look for any loose staples or paperclips too.
Link Posted: 4/15/2006 2:31:38 PM EST
Check for overhearing. Clean out all the air vents, etc., and make sure all the fans work.

Make sure the air inlets are not too close to a 21" Sony CRT heat generator.
Link Posted: 4/15/2006 2:39:37 PM EST
[Last Edit: 4/15/2006 2:43:46 PM EST by clement]
either overheating, bad memory, or faulty power supply.. (I think overheating is least likely, as it usually turns off the computer not restart it (as far as the cpu goes anyways, video card can be a different story but you should see graphics errors long before a restart))

To test memory grab memtest86

Link Posted: 4/15/2006 2:46:28 PM EST
I have had the same peoblem. Overheating.
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