g5 won't start

Hello all, first time here, My g5 for some reason wont boot up. I do get the chime and the only fan that revs up is the one near the hard drive. The only red led light(besides the one in the front) is the one under the processor. I am concerned it might be shot. I first thought that maybe the video card. I currently don't have another g5 video card to test this thing. I just bought it from ebay last week and showed up today. I have already taken out the pram battery. Any help would be appreciated.

Model is a g5 1969c

 

yes its the 2.5ghz dp with liquid cooling. like I said, the only light that kicked on after chime is the one under the processor. is it possible to downgrade to 2.0ghz with the present motherboard?

 

I did get the g5 to work by switching to a air cooler but need standoffs and screws to secure it. does anyone know where I can get them at a decent price? the few places that have the standoffs want at least 30+ dollars for them. I have found the screws cheaper though. forgot to mention that I believe that the part number for the stand is 922-6060.