Hi, i have the same problem with my MBP 15" Early 2011, the airport Bluetooth is functional but not the Wi-fi. The Wifi Icon indicates hardware not installed. I have tried everything, Clean install, change hardware with airport cart and Antenna and the procedure outlined earlier in this page. Nothing works, i hesitate to change the flex cable Airport but I would like to be sure that this is before ordering the piece. please, help me.