I can't see any way to tell the difference between a dead battery and a dead touchscreen (but you just may not have enough power to run the touchscreen at the moment) without opening it up.
That model is easy to open, just follow one of the teardown descriptions.
The KT-2 is similar enough to the other models that you could follow those directions, see:
https://www.mobileread.com/forums/sho...d.php?t=249979