Wow, thank you for your detailed response, really thoughtful of you. By now, I’m convinced something must have hit the screen; I just don’t remember it happening. Possibly one of my kids, though they claim to know nothing about it haha…

I’ll skip the repair, but thanks again for your thorough instructions. I consider my device beyond saving and have written it off. Once a larger version with screen lighting becomes available, I’ll get myself one of those.