Originally Posted by
gfunkdave
Weird.
Maybe the battery got disconnected?
That, moisture/build-up damage, or something else is loose/not connected inside the phone.
It may well be something wrong is with something in the phone; but it could be worthwhile first ruling out a problem with the charge/USB cable and/or charger.
Those are the hardware problems. The firmware/software-related problems are a beast of their own. It may also be worthwhile trying to do the hard reset process and be patient with that taking place while the phone is plugged into a tested charger -- even if it appears that nothing is going on, something could be operating in the phone still.