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Computer shut down by itself and won't stay on for more than 5 minutes

Last response: in Components
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April 26, 2013 6:37:43 PM

My computer just started acting up by turning itself off and back on repeatedly. Sometimes it stays on for a minute and sometimes it just restarts after 3 seconds. 1 in 5 times it reaches the windows bootup recovery screen asking if I want to restart Windows normally but it turns off again no matter what I select. It has launched to desktop once and stayed there for maybe 3 minutes before turning off agian.

My parts are:

Coolermaster HAF 922 case
Corsair TX750 psu
Asrock z77 extreme 4 mobo
Seagate 1tb harddrive
2 x Radeon HD 6850's cross fired
2x 4 gigs of Kingston Hyperx ram
i7 3770k CPU
Zalman CPU fan.
Random CD-drive

This was very unexpected because the computer has been running fine for a year and no new parts were added. I have tested the psu with the paperclip test and I have tried booting it with minimal parts to try and locate the problem but I have yet to find it. My best guess at this point is the motherboard. I am also away at University so it's difficult for me to get new parts on the fly.
April 26, 2013 6:51:32 PM

it seems like it's powercycling. my guess would be the PSU or a capacitor on the mobo...
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April 26, 2013 6:53:27 PM

I'm not sure if there's another way to test the PSU other than the paper clip test which I did. The fan on the PSU spun and it seemed stable.
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April 26, 2013 8:48:38 PM

It is hard to say because it could be the PSU or the mainboard. Do you have or a friend that might have a spare PSU you could try. That way you could rull out one or the other.
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April 26, 2013 8:58:37 PM

I'm going to ask around. I think I know 1 person who has a spare one that's weaker that I could test. I will report back with the findings later tonight.
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April 27, 2013 5:01:30 AM

Dust, is there any dust ...anywhere?

HDD free space? You need a minimum of 25%. Considering a 1 TB hdd, that would amount to 250gb of free space required (seems an awful lot of free space required, maybe Microsoft had not considered that there would ever be 1TB hdd's, and that we'd all be using 320 gb hdd's for ever).

CPU heat? You might need to re-apply thermal paste, some CPU's run hot and cheap or low grade thermal paste does dry out.
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April 29, 2013 3:29:19 PM

Well I got a new motherboard and that seemed to have fixed the problem. There was a lot of dust that I cleaned out so I'm not sure if that contributed to the problem but I'm going to make sure it stays a lot cleaner this time around. I only have half of my HDD filled so that shouldn't be a problem and I had to reapply thermal paste but I'll keep an eye on that temperature for the future. Thank you to everyone who helped.

Edit: Does anyone know how to mark this as solved or close this thread?
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