can you make a hard reset?? by pressing simultaneously the five buttons : power button, camera button from left side, green "send" button and red "end" button from keypad and the soft-reset button (using your stylus)... ? (i was tired first time i wrote the procedure, my mistake!)
or, perhaps, enter bootloader by pressing simultaneously the two front buttons (the left and right of the keyboards joystick) and the soft reset (using your stylus)
if ok, you'll have that screen again, showing vG.39 on bottom, and "serial" or "usb" on top...