I think derbyjake means another connector.ajm said:I had a pc with the same connector on it and my psu failed,i replaced it with a 400w with just the 20 pin and the 4 pin (no 6 pin on the psu) and it works just fine with no problems.Maybe worth a try for you if you have a spare to check it out with.
It is propably an extra supply of power for the mobo much like the square 4-pin connector on ATX mobo'sderbyjake said:im not sure its on a compaq ap550 is reffered to as an aux connector,
it does boot up with it disconnected though, i tested do you reckon would cause me probs tho