The screen is a critical component of the iPad, so it can cause a lot of panic when it suddenly has issues. Aside from the button or two on the sides of the iPad (and a Home button on older models), ...
Recovery Mode: Connect iPad to a computer > open Finder (Catalina or later) or iTunes > restart > Update from the recovery screen. If you don't have access to a computer, use iCloud to wipe the iPad ...
Other than when you've enabled the AssistiveTouch feature on your iPad or iPhone, there shouldn't be a bright spot on your iPad or iPhone screen — one that stays in its place, no matter how much you ...