How should I turn on the wireless capability for my Asus X71SL. I have windows 8. Flight mode is turned off. Troubleshooting tells me I need to turn on wireless capability by using a switch on the front side of the computer, or function keys. I have tried pressing Fn, F2 but it didn't do anything. The function keys work, as F5 and F6 change the brightness. I'm not a computer expert so I would like to ask that the answer isn't too complicated.