Hi.before i take it to the highly trained monkeys at the local PC shop to get it looked at, ill post here to see if there is an easy solution to this.ive been getting the Blue screen more frequently, so today, i took the case off and had a look...The Power Supply Unit fan doesnt turn, it shows no signs of trying, the CPU Heatsink fan hardly turns, its running at a really low RPM than usual, then, it stops turning after about 30 seconds, and 'pulses'...like tries to turn but with no success.Every thing works apart from those two fans, the system runs fine, it just shuts itself down when the PSU/CPU temperature gets criticalAnyone have any idea on whats going on here?any comments will be appreciated greatlyLiam

Hi.before i take it to the highly trained monkeys at the local PC shop to get it looked at, ill post here to see if there is an easy solution to this.ive been getting the Blue screen more frequently, so today, i took the case off and had a look...The Power Supply Unit fan doesnt turn, it shows no signs of trying, the CPU Heatsink fan hardly turns, its running at a really low RPM than usual, then, it stops turning after about 30 seconds, and 'pulses'...like tries to turn but with no success.Every thing works apart from those two fans, the system runs fine, it just shuts itself down when the PSU/CPU temperature gets criticalAnyone have any idea on whats going on here?any comments will be appreciated greatlyLiam

Well then make sure your CPU heatsink is plugged in properly and the wire isn't loose. And I'd say that you should just change the PSU.

Well then make sure your CPU heatsink is plugged in properly and the wire isn't loose. And I'd say that you should just change the PSU.

ive checked all connectionds and theyre fineone thing on my mind is, my pc restarted itself the othber day, i went downstairs, only to come back to it doing a rebooti think the bios might have been reset...my case fan now runs X2 as fast as it used to, and the other 2 fans mentioned dont... i just have no idea how to check my bios Liam

is your PC custom built or from a store.When it boots up and is doing the POST press and hold F2 tell me if you can get there.

Before you try anything else, try replacing the power supply and the fans. It sounds as though you may have burned the fans out and if that's so, then you'll be hitting peak temperatures and the system will shut down to protect itself. Something similar happened to me when I first did my build - I tried to run six fans off the motheborad and it couldn't hand the load. The result was that the fans died. I replaced them and connected the new ones to a fan controller that I installed in one of the external drive bays. Everything has been fine since then - running smoothly for 18 months.The problem could be somewhere else but I'd look at the fans first.Hope this helps.Best,Alan

Cheers for the replies guysIve dropped it off at the shop where it was built for me and they'll ring me as soon as they know whats up, the guy thinks the psu might not be letting enough power thorugh, but theyre gonna run tests and let me knowLiam

To keep you informed, it turned out to be the CPU, it was overheating, they removed the old stock heatsink and replaced it with a new coolermaster oneBefore:After: Liam