My wife was using her phone last night and she said the screen just faded and then locked up. She did a hard restart, the phone went off, but didn't come back on. I plugged it into wall thinking the battery may have just died. After an hour or more on the charger, it still wouldn't come on. I've tried just the power button and also the power + home button, nothing. I plugged the phone into my computer and iTunes does not recognize the phone. Windows doesn't even seem to recognize that a USB device has been plugged in? Anyone have any ideas?