Okaaaay. Heres a shot in the dark!!!! I had a simular problem but Mine wouldn't switch off from the reset screen. I had to use a screen cleaner on the on/off switch and then do a double reset a few times. Eventually this seemed to work. (Double reset when you press the stylus in the reset hole twice quickly) This clears anything thats been corrupted in the T3. Then hopefully you should be able to reset properly and hotsync everything back to the T3. You could also try the user group on yahoo. click here you have to join but they're not a very busy web forum.
Also I went to the expansys web site and bought a leather case by Covertec that covers the on/off button click here
Hope something here will help.