have msi 865gm2 mobo with p4 3.5 cpu. Was running fine then suddenly stopped starting (will not power up - fan starts to turn then power goes off after a second).
I've checked all connections which are fine but have found that if I leave the CPU power supply cable disconnected the PC starts and power stays on. Obviously nothing happens as no CPU is attached. I have cleared the cmos in case the CPU voltage settings had changed for some reason without result. I thinking the p4 CPU is damaged!