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It works well during the disk selection stage(option key pressed during boot). but once i eneter recovery mode it stops working as if there is no hardware installed even when i boot up and try to on wifi it doesnot respond. it just stays off but bluetooth works fine after booting up. please help
Already tried an SMC reset ? If not give it a try. If that doesn’t change the picture there are basically two options, something bad with the wifi module or cable (cables hardly go bad), or a fault in the logic board. For the first possibility you can try your luck by replacing the module and cable first: MacBook Pro 13" Unibody Early 2011 AirPort/Bluetooth Board Replacement MacBook Pro 13" Unibody Early 2011 AirPort/Bluetooth Cable Replacement In case the issue will be still there you’ll need somebody doing component level repairs, better if with some Mac repairs experience.