Help With K7V Dragon Plus! board?

Hi
I problem I have with the board is it doesn't want to boot. I swaped
the memory , video card and it still doesn't boot. The problem
everytime the board gets the power it shuts off. I called SOYO and I
was told that the CPU fan is not spinning higher RPM so the board
shuts down to prevent the damage to the CPU. I checked the CPU it
works.
Specs

K7V Dragon Plus , 1800+
256 PNY
G4 TI 4200
WD 40GB