BOAC:
I'm not familiar with your machine, but do you have hard drives and do they run? Some mobos also have led hex indicators for boot stages tucked away somewhere
If your motherboard will not post none of the drives will spin up.
The reason for this is power comsumption, the motherboard will start each drive one after the other - hence a single drive machine will boot faster than a multiple drive machine.
The reason for this is the power consumption required to take the drive from a stand still to spinning - if all possible drives were powered on at the same time the draw on the power supply would be too much compared to the fraction of the power required to maintian the speed. Therefore all motherboards will start the drives up sequentially, so no huge draw takes place.