In my Mac book pro suddenly it showing Wi-Fi: No Hardware Installed? Please help me how I can resolve this...
Reset PRAM. http://support.apple.com/kb/PH4405
Reset SMC. http://support.apple.com/kb/HT3964
Choose the method for:
"Resetting SMC on portables with a battery you should not remove on your own".
For more on this:
If this does not help, contact Apple.
Retrieving data ...