Coming back from xmas I switched my pc on, it restarted itself after being on the windows log in screen and then froze on the initial loading screen. I switched it off and when I tried to switch on again the pc booted up for a second then went off again. Then five seconds later it tried again and off. If I dont switch it off at the plug it continually tries to switch on. I've looked at some forums and tried to rule out obvious fixs like loose cables etc.
Can anyone give me some pointers on how to try and troubleshoot this as I dont have spare components like a spare PSU to see if its my power pack thats gone?
Thanks a lot