the only thing left to try is to unsolder one battery lead, wait a few minutes, then solder it back and see if the camera will respond/charge, etc. That has worked with some cams.
I was wondering if total dissconnect would help. I still think I toasted it but I just clipped the neg wire. I may have hit the vid button at the same time I tried to power it up when this happened. fat fingers. How long about ten min or so?
EDIT: gave it 10 min and reconnected, no luck. Airchime I must have gotten the older version that bricks when using the on/off file. I'm quessing that brick means the firmware got corrupted?