[n1kn0k]

Thank you for the quick replies, everyone.

As mentioned in my original post, I tried charging the device for ten straight days, and that doesn't appear to have changed anything.

Based on your replies, there are two feasible options to find the culprit: (1) swap battery, or (2) swap the touchscreen.

Unfortunately, I don't have extra PW2 devices I can dismember for this exercise. I do have a venerable K2. with the keyboard, that I still use. I wonder whether the batteries are the same...
EDIT: just checked online, batteries are not compatible.

@geekmaster, when I get to the language selection screen, selecting the language doesn't register. None of the screen touches appear to register at that point. Yes, I suspect it to be a faulty touchscreen, as well.

@knc1, i'll take a look at that. Thanks.
Thank you again for your help.