[PC PROBLEM] pc keeps shorting out

[airrunner]

Hi everyone,
I wonder if someone could assist with my computer problem. This does not happen very frequent but nonetheless it's not right.When i go to turn my computer on sometimes, it fires up then cuts out completely. Then when i try again it won't turn on. If you wait 20 mins it is back to normal and runs fine.

What could be causing the shortening of power? Obviously not confirmed but i can only assume that is what it is.

Many thanks to all your responses with this query.

 

[airrunner]

to be fair i haven't tried a new power supply on it, but im surprised i didn't think it was a faulty power supply.

My spec is:
amd phenom 955 x4 overclocked 3.6
4gb ram ddr2
powersupply corsair 650w
ati radeon 4890

As we speak it had happened a few days ago, but before that it could have been a couple of months.

Thanks again for all your advice and suggestions

 

[airrunner]

I had this problem with my case. Solved it by taking everyone out of the case, then testing the system and all was stable again. Placed it back in and seems the problem disappeared. Try testing everything out of the case?

Great idea i think i will give that a try first before going down the route of buying a new power supply.Thank you very much, i will update this thread on how i get a long.