HELP Comp won't boot!!!

Well I recently built my first and for some reason it won't work now. It consists of:
Asus P5Q SE mobo
Intel E7200 OC'd to 3.5ghz
8gb of RAM
Antec (420watt I believe) Power supply
EVGA 8800GTS

whenever I turned it on the fans would run fast for like a second then go down to idle...now whenever I try to turn it on they just stay at that fast speed and never go down to idle. It also just hangs on a black screen, it won't even show the bios or anything...no clue why.

Before this happened I was in the process of swapping hard drives around to install XP on a second drive but I decided not to and shut it off. However it boot again after that but it wasn't recognizing my DVD drive which is why I restarted it the last time it worked...won't turn on now Everything in there is brand new...

I've got a spare PSU and the comp did the same thing when trying to boot. Occasionally when I try to boot it, it will run the fans for a split second then shut off, then boot again and stay on...by on I mean just hanging there running the fans at max speed...

Tried resetting it via the little jumper, no luck. Tried taking the battery out and resetting it that way...no luck

Give me 4 gigs of your ram.

wow that's helpful

Open your computer back up again.  Push back in all cables (even the ones you did not change) and boot computer.

you need to reinstall windows and set up a boot disk on your floppy drive (I didn't see one listed but I assume you have one?!?!?!)

http://www.filelash.com/437772