Do you hear a post test>
It will be a beep form the motherboard.
What type of video card do you have?
It could be a video card issue.
I installed a new motherboard and CPU. When I try to power the PC up ligts appear on the CD and disk drives but the monitor never turns on. No Bios display nothing. I have tested the CPU in another machine and it works.
Short of taking the notherboard back any suggestions would be appreciated.