System won't power up

Hey guys,

Well, I built my new system last night, and it won't power up. I plug it in, turn the PS on, I see the green LED on the MB go on, then I hit the power button. Here are my observations when I hit the power button:
* No fans spin -- not even the PSU or CPU fans
* The System Power LED on my case turns on
* 3 other LEDS throughout my case turn on for a second and then go off.

That's it. To try troubleshooting, I stripped everything but the essentials. Still, nothing.

I also tried testing the PSU. I inserted a paperclip into the green and black wire connectors, as instructed in the manual for the test. I unhooked it from the MB, turned it on, and the fan spun for maybe 5 seconds and just went off. At least the fan spun, but the fact that it stopped spinning after 5 seconds leads me to question if the test was successful or not.

Any ideas? I've built 5 systems and have never had this problem. I think either my PSU, MB, or Processor is defective.

Here are my specs:

Intel Extreme Series DX75XBX2 MB
Intel Core 2 Quad Q6600 Processor
Corsair DDR2 Twin2x2048-6400C4 Ram
Thermaltake ToughPower 700 W PS

Any suggestions would be greatly appreciated.

sound like psu problem, the psu should stay on all the time when clip is short between green and black. do you have a dvm to check voltage?