New build problems - help please!

[SinaiSound]

I've just put together my new rig and it's not playing ball at all

Spec consists of

E6600
Asus P5K Deluxe
4GB Crucial ballistix PC5300
X1900 XT-X
Corsair HX620 PSU
all watercooled

When I press the power button the fans turn on, then turn off. It then tries to start up again, but the same happens

Any ideas?

Sounds like a bad motherboard to me, but I don't know

 

[SinaiSound]

Took the mobo out of the case and placed it on an anti-static bag on top of the mobo box.

Still the same issue with a different psu and different graphics card

 

[SinaiSound]

Well I seem to have fixed it

I plugged some fans into the headers on the motherboard and reset the CMOS