mac pro. Audio input fed via the rear jack. Using program (can't remember the name) to create passthrough. Worked fine for months. Now however I get no sound from the audio input unless I put a bit of pressure downwards on the cord going into the jack. I have a stapler placed on top of the input cord right now and it works fine, but if it gets moved, then it stops working. Kind of a redneck repair for the time being (note to sensitive cultural types: I lived in Kentucky, so I'm allowed to make such comments ) If I take this to the apple store - is it likely to need a whole new MB? I just put on a aftermarket video cooling system for my ATI card and i'm worried about taking it in for service - will they note that and refuse any repair on the card in the future? Anyone else ever have same problem?