And I phoned Applehelp last night and a wonderful woman guided me out of the AppleTV mess. I am still not clear about how it happened but it is fine now AND she told me how to connect computer to TV for that larger screen! I wrote it down. So I can console myself with programs I like rather than sports and other stuff of no interest to me. And I did not have to wait overly long for help, and had the choice of silence rather than someone else's choice of Music.