I have a shop built PC just out of warranty, running windows 7.
I tried a re-instal which failed leaving it not booting up.
I tried unplugging it for a couple of hours, plugged it in and it was dead, no nothing. I tried removing the PSU to see if there was a fuse then refitted it and it started. It then would not turn off so I unplugged it again. Now it is dead and nothing will make a difference.
Any help at novice level will be appreciated