Wi-Fi won't turn on iPhone 4S? - 2

After my phone died one night my Wi-Fi setting to turn on turned light grey. It won't give me the option to even turn it on.I've tried resetting it (holding down the lock and home button until it restarts), I've tried just turning the phone off and back on, I've even tried connecting it to the computer but it won't back anything up therefore I really don't want to restore to factory settings.

Any ideas on how to make it able to turn on?

Try going to Settings > General > Reset and selecting reset network settings