I tried a remote release for my XTi in a recent photography course. We were using trail cameras, and one of the cameras (film) had a remote release that fit in the remote jack in my XTi. We tried it out and the camera wouldn't fire when the sensor was triggered. I removed the jack, and now the camera is unresponsive. The only button that works is the display button (turns the screen on/off). The camera won't let me change ISO, WB, AF points, access the menu, review the pictures or anything else. As soon as you turn it on, it starts to AF and hunt to take a picture. I've tried removing the batteries from the battery grip and removing the memory card, but with no luck. Any tips or suggestions? The camera has very limited use as is.