Guys after a little help here NEC desktop/tower Intel P4 won't power up it's completely dead but then on the odd occasion it comes on and unless you turn it off runs fine. So far I've removed everything from the motherboard apart from the psu and the same happens, you can press the power button loads of times and then nothing happens. I've also tried without the power button plugged in and just shorted the 2 pins on the m/board but still nothing. I'm thinking it must be a fault with the m/board as it's currently been booted for the last 3 hours and is fine.... When it does nothing not even the psu fan spins up it's just like the plug is switched off, I've also tried a different power lead. I was going to try another psu to see if that was the problem but don't have one with the same m/board connector unfortunately. Anyone got any ideas?