Today I returned from my trip, which, in the hotel, I used an ethernet cable, and connected to the hotel internet just fine after paying. When I got home however, my wifi icon was empty, and when I clicked on it, the dropdown says 'No Airport card installed.' I'm on a 15' MacBook Pro, Version 10.6.7. I've tried everything. Used system prefrences 'Network' tab to diagnose and assist, I've called apple, but do not have apple care, and tried 'vg88's' advice:
"I had the same issue and called apple care (I have a macbook pro running os 10.5.2). They had me shut down the computer, remove the power cable and battery. I then had to hold down the power button for 5 seconds. I reinserted the battery and attached the power cord. I was instructed to hold down the command, option, p & r keys will pressing the power button. I had to keep the command, option, p & r keys pressed down until I heard three start-up chimes. After the computer booted I turned on my airport and it was working fine. Hope this helps."
After doing this, the internet worked fine (I forgot to mention, at home I use a regular Netgear wireless network) Then my computer wouldn't wake up after I put it to sleep (not really a problem, but I was really aggravated) so I forced a shut- down, and when I rebooted, My wifi card was 'not installed' once again. Oh yeah, i the process I stripped all three screws that hold in my battery, so I cut them to be flathead screws on top (does that make sense?) I love mac so much, but I am absolutely fed up with this problem. Was it something I did? I don't care, I just want to know how to fix it! Any help would be greatly appraised. Thank you, Lindsey