wifi antenna not works

My 2012 iPad will no longer access WiFi. The strength icon shows a strong signal, but I get no connection. I don't know if the problem is software related or hardware. I asked a 'genius' at an Apple store, and was told to contact my provider, CenturyLink. So I did but was told to contact Apple.

Please help with my wife's ipad2;-) Wifi not works, details: - Digitizer not changed, only antenne - Tried all basic helps (network refresh, restart ipad, router change, etc.) - Bluetooth not works as well. - No 3G, only wifi version (32GB version) - So I think that is hardware issue. But...