Fitted new PSU: Now won't post
I was attempting to fix a machine that was seemingly having power issues; it had been cutting out regularly, and then refused to boot until left for a little while after.
I got a new 400w PSU for £20... it was on the sly from the technical dept. of a large company, and I've used the PSUs before from them with no problems.
Swapped it over with no issues, all connectors fitted... its an AMD so left the P4 connector unplugged, everything else fine.
Booted perfectly afterwards, and ran well for a good few hours. Came to boot up about 4 hours later, and now it won't post. Fans are running from what I'm told, and lights are on, but no system beeps.
I'm going to try switching the PSU back, but any other comments/advice would be appreciated.