JSimmons, are both PSUs ATX? If so, the motherboard can probably drive the PS_ON (green wire) for both PSUs down to ground when the front switch is turned on.
Basically, the PS_ON line is supplied with a current limited +5V signal which can be forced down to 0V by the motherboard. If the motherboard can sink twice that current (should easily be done), then the motherboard can turn both PSUs "on" by having both PS_ON signals hooked up.
Just splice the green wire from the 2nd PSU to the green wire from the 1st PSU and have the joined signal go into the motherboard. The motherboard will then turn both PSUs on.
edit: replaced drive with sink, which is more appropriate when driving a +5V signal down to ground
|