This morning my daughters computer wouldn't load vista, and when it tried to do a startup recovery the computer switched itself off in just under a minute.
couldn't get the recovery partition to work so tried to re-install the vista cd, and it got so far and the computer switched off.
I re-seated the heatsink and fan, but this did not cure the problem.
Ran Hirens boot cd no problem and the computer passed a couple of tests.
Ran Ubuntu live CD which seemed to work for over 20 minutes, so moved computer back to daughters room, and I was back to the problem and couldn't even run Ubuntu.
Ran boot cd again and it passed a 10 minute stress test.
Replaced the PSU but it didn't make any difference.
Checked all connections a disconnected hard drive , no change.
So if I can run Hirens and ultimate boot cd with no problems, why can I not install vista or run a live cd without the computer shutting down ?