My laptop did same thing got it back by hitting Fn bottom left corner then holding then hit F5 showed me displays then click single display hope this helps i have to do it when i change to smart tv screen.
Own a Predator Laptop? Then I bet you have learned a thing or two from beststevie. He has been helping out in this forum for quite a while and it's about time we recognized him for it. Thanks beststevie!