It turns on for 2-5 seconds and then shuts down. I can't seem to find the cause of the problem, I've checked everything. No POST-screen, nothing. However, if I remove the CPU, the screen background-light turns on and freezes, and the fan sounds weird. If I then re-insert the CPU, nothing happens again. It was working earlier today. Specs that I know of: 1 GB Hynix PC2 RAM 160 GB HDD WD Scorpio WD1600BEVT 2.0 GHZ Intel 575m I've tried replacing RAM too, same result.