Rebel is 3years old. Went to start shooting baseball game and nothing.... No power...no lights, no motor, not even a flash or blink. I have tried: new batteries start up without the lense/CF card start up with a different CF card connecting to the laptop cleaned the battery, the CF card and the AV oupt doors and inspected jiggling the on/off switch jiggling the camera mode dial Still nothing? Any suggestions. My thought is the power board.