As I said, it is not like the touchscreen isn't sensing my touch. It shows a green line through the Android pattern unlock buttons, but doesn't turn the button green or red. I wanted to post a photo, but your system wouldn't let me. I have no trouble using the touchscreen with other programs or functions in the bottom area.
If it is a touchscreen issue, perhaps due to being used for over 3 years, is this a replaceable thing? When I thought this thing was dying I priced an HTC One locally and it was $1000. So if I can just save this thing for much less I would be happy. I can't complain. I don't know if it is a fluke, but my HTC seems to have reliability I haven't seen since my old Nokia 6100 series.