MacBook Air (Mid 2009) A1304 WIFI help

I have the same problem with exact the same MacBook Air (mid 2009). I also replaced the WIFI module and the cable connection to the motherboard with no results. The strange thing is that the WiFi card shows up in the "System Report" but not in the "Network System Preferences".

PRAM / VRAM resets and clean system installs won't work, I fear that this is probably a motherboard issue. But if someone could confirm this it would be

highly appreciated.

Hi everybody! After a many tests (I changed the airport board, airport cable and wifi antenna, SMC and PRAM reset, bluetooh turn on/off and restart) and nothing worked!!! The last cause that I think is the mainboard problem! Ok, before to change the mainboard I try downgrade OSX to Mavericks a usb boot in a fresh install and..... Voilà de the wifi back before the installation!!!! In the initial Mavericks screen installation (usb mavericks boot+option hold and power). I finished the installation and the wifi works perfectly!!! The problem is the Yoshemite incompability with A1304!!!!!!!

Sorry to tell you that doesn't work for me. Did a clean install with Lion, Mavericks and Yosemite. Didn't bring the Wifi back for me.

Bad News!!!! The problem back again!!!! I change now the mainboard and the computer wifi works fine!!! The problem is the macbook air motherboard 😢