Built a new pc, display worked, then stopped.

[arice72391]

Asrock 970 Extreme3 Mobo, HD6670 GPU, AMD 965BE, Gskill Ripjaw Ram 2x4GB, Corsair HX750 PSU.
Built it, it worked fine, was in the bios, randomly lost signal to the monitor and it still wont show signal. Any ideas?

 

[alvine]

try a different video card if you have one laying around. when you turn the pc on do the fans spin up?

 

[arice72391]

Tried a different GPU, same result. All fans spin.