Absent all the other problems I've been having with my 2015 15" MacBook Pro, I just noticed a dead pixel right in the center of the screen. It's certainly new (past 24-48h) and now, of course, I can't stop staring at it. I have AppleCare for my computer, and it's more than a year old. Is this something that's covered? Does this just happen to computers? I sort of assumed that because the screen was okay at the start, it would stay that way! Edit: There are actually a couple, at different point.