PC randomly turning off

joeyjojo

joeyjojo

joeyjojo

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Joined
2 Dec 2005
Posts
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Location
Herts
My trusty 775 PC has developed a problem. I don't really have the money to replace it so I'm hoping someone on here can suggest the likely cause.

The problem is it randomly switches off, like the power being cut. I was gaming on it fine yesterday. Today I was using it lightly just surfing the net and a few times now it's just died, after anywhere from a few seconds (not even finished POST) to a few hours after switching on.

I've had a look through the event viewer and can't find anything. No errors or anything on screen, just switches straight off. Have inspected the inside and looks fine, no smoke, nothing blown.

It's all in good health as far as I know apart from one of the HSF pushpins is broken (it's hanging on with 3/4 of them). Not checked the temps but they've always been low despite the fault. Next time I turn it on I'll have a look at the CPU temp in the BIOS before booting up.

Specs:
Gigabyte GA-G33M-DS2R
Xeon X3320 (Q9300) at stock
4 GB Kingston HyperX
Sapphire HD 7850
Corsair HX520W
2x Samsung HD753LJ 750 GB HDDs
Windows Vista x64

The mobo, PSU, and memory are very old. I haven't any spare components at the moment so can't begin to narrow it down that way.

Anyone seen this kind of thing before and got to the bottom of it?
 
Cheers bennyboy. That was my first thought too and it's really the only part I can easily swap out so I'll give it a try. (Will fix the pushpins at the same time! :p)
 
It is most likely to be a PSU fault, but not for definite. You need to start eliminating possibilities. Can you source a PSU to test the system on?

Edit, did not see your most recent post ^^
 
Replaced the PSU with a Cooler Master Silent Pro Gold 450W and systems seems to be fine. Thanks for the suggestion.

I'm surprised the Corsair just became unreliable after all those years of service. Better than it going bang though I suppose!
 
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