Well this morning I had the Pc on fine downloading lost planet from steam, left it on to watch the man u game.. Came down and Pc was off, my mum had attempted to go on it.. Knocked it with her knee and it made a whirring grinding noise so she turned it off, I turned it back on and said grinding noise happened again. So I took the side of made sure all the fans hadn't got anything in them.. Retried.. Grinding noise again, so I unplugged everything and had a look and couldn't see anything wrong, I tidied up some of the cables and put the side on, replugged everything in, pressed power button.. Nothing. No fans starting no noise nothing. Opened the case and the green light on the motherboard is still on which I take it means there is power going to it.. :s took out the components bar the CPU and tried again.. Still nothing. :-/ sp it seems it's basically gone dead. Any ideas?