Hi!
I think I know the solution to the problem!
It was the same for me, put in the CPU, mount the board and placed it in the case, plugged in all my PCI cards (Sound, TV-tuner and Network) and my AGP GF2. Turned on, but nothing happens, only the fans and my hard drive spinned up.
The solution (or at least a way that worked for me, but I do not take any responsibilities!) :
It seems this board does not like to boot up with a large number of changes in it, I mean: for example a new CPU, and lots of cards that change slots or plugged in the first time the motherboard boots. What I did was the following:
1. I unplugged power supply from my case (that means simply turning off your PC with power button is not enough!)
2. I took off every card, except my AGP Geforce2.
3. I cleared CMOS with the jumper (set it to the other position for 2 seconds, then set it back to original).
4. I plugged in power supply, but did not pressed power button yet (a red LED turns on on the motherboard, near the lower right corner)
5. I cleared CMOS again (maybe it is not necessary)
6. Turned on the computer. It booted!!! Went into BIOS, and turned off USB and RAID controllers in Integrated Peripherals menu.
7. Plugged in PCI cards one-by-one, and always rebooted my machine just before OS started to boot (pressed CTRL-ALT-DEL)
8. Turned on USB and RAID, and installed OS.
Everything is fine now.
I hope I could help you.
Oszi.