No video what so ever yet, you hear everything cranking up?
You've tried all mediums VGA, DVI, HDMI and the monitor shows 'No Signal'?
Is it a monitor or a LCD or Plasma?
If LCD or Plasma make sure your TV input is set to HDMI yadda yadda.
Are you using a PCI-Express GPU or the onboard GPU?
Possibly try a different monitor just to make sure that is not the problem.
If that fails.. Then you're one of the lucky ones to get a busted motherboard.
I would say check the BIOS settings but, w/no video, that will be difficult.