I have a ASUS P4S800-mx MB with Intell CPU that will not boot. Fans, lights, all power up. Computer was on and I went away and then came back got a no sync on Monitor. Tried different monitor, Tried new power supply, changed MB Battery, reset CMOS. The lights on the CD DVD's stays green and there is no Hard Drive Access. I removed all device except KeyBoard, Mouse, Monitor. Still no boot.
Do I have a bad motherboard.