Computer boots up, no signal on monitor though.

[Deff]

My Specs - OCZ 650 Watt PSU
Intel Core 2 Quad Q8400 Yorkfield 2.66 GHz
Gigabyte Radeon HD 6770 1 GB GDDR5
4 GB of DDR2 RAM
P5KPL-AM/PS LGA 775 Intel G31 Micro ATX Motherboard
500 GB SATA HD with Windows XP preloaded
DVD-R/CD-R Combo Optical Drive
7 Cooling Fans

I was using the computer (Internet, youtube, etc) and then it had froze up, then the screen had went black. I had rebooted the computer, no luck. Screen was still black. The computer boots up fine, fans, lights etc turn on. Help!

 

[Levioth]

Do you get the Bios splash screen? or does that not come through either