Ok this it the problem yesturday I went to turn on my PC and nothing, it was fine when I used it the day before that. When I push the power on button nothing but if I switch off at the mains then back on again we have life. Sadly for about 3-5 seconds only. I can here and see the fans spin up then it all goes off. If it last for the full 5 seconds then I see the graphics card bios info before it dies. When I unplugged all peritherals and did the mains trick it was on and stayed on but unable to do anything as nothing was attached, but I couldn't switch it off using the power on/off button so i had to unplug it(I know!!!). Can't do F8/del to get safemode or bios setting as it doesn't get that far.