Hi, my friend just rang me having a few problems with his PC and I've been guiding him through some basic troubleshooting over the phone, but I'm at a dead end now. All I know about the PC is that it has an Asus P4S800-MX Motherboard, Some form of P4 CPU, 1GB RAM and an All In Wonder 9800 Pro. It was a pre build from OCuK in fact. Anyway, it was working fine at 12 this afternoon, was turned off, and now, 2 hours later refuses to boot. Just turns on, no monitor output, fans spin, no beeps. Here's whats been done so far: - Removed Graphics card (no beeps, fans spin) - Removed Memory (no beeps, fans spin) - He's removing CPU at the moment. Would I be right in thinking that if it beeps with no CPU, its the CPU that has died, and if it doesnt beep then its the Mobo? Any other suggestions?