s5000VSA can't boot with 2 processors

- No video signal at all;

- CPU fan 2 doesn't spin, except if i plug on a chassis fan header;

- Both processros and fans work when a single processor is installed;

- PSU is 650 Watts with one P4 and the other P4 is adapted from an ordinary plug.

Tried all tips from board's site but nothing. Anyone with similar experience?

Thanks