My HP 7900 computer's case fan started making noises at time and I purchased a new case fan to replace it. The problem I'm having is when I went to change it, the plug on the new unit, although being a 4 pin like the old one has a narrower slot on top of the plug than the HP plug and will not fit! Is this some stunt that HP pulls to force you to buy replacement parts from them ? If so, does anyone out there make an adapter for this situation? Or does any of you have a way around this problem ?