The WiFi on my macbook pro 3.1 is not working - the mac does not see the wifi card. The left USB port is not working too, but provides power (no data). The bluetooth is recognized. I have tried all the resetting ways and stuff - none of them work. I just want to know if my WiFi card is dead, or the part of mac, it's plugged in. Or both are dead. The audio works. Any ideas?