So yesterday I plugged a special line from the audio out of my bands PA system into my built in line-in on my macbook, and started to test out the volume levels by recording some. It worked for a little bit, but then in testing a second time, I went back to listen and my computer read that it had no audio drivers or ports at all. I figured I'd just go to the macrumor boards to see what was up, but guess what? No Internet at all. It said airport card wasn't even found. So i've been online on my iphone/family PC looking it all up and i even did an erase and restore of my entire macbook and still no airport, no sound, but the red light coming out of the headphone jack (when I only used the line-in) has finally stopped. ive no clue whats going on or how to fix all of this. Ive tried the various ways of booting up (like with p+r+apple+ctrl or with d) and still nothing. Will I have to set up an appointment at my local Apple store (an hour away) or is there something I need to try?