5d help, won't turn on
Was shooting a wedding today and during the reception, I was changing CF cards. I had an off brand (Targus) battery grip attached to my Canon 5d. As I popped in the card (a Hitachi 4gb Microdrive) and tried to turn the camera back on and it was dead. Took the battery grip off and put a battery in. Nothing. Used my backup body the rest of the night but now I am back in the hotel room and still with a freshly charged battery it will not turn on. Any thoughts? Do I just need to send it in to Canon for service? Thanks for any and all help.