Recently hooked up my Apple TV to a new television. It worked fine when it was last hooked up to another TV a year ago, but when I try and use AirPlay Mirroring now, my computer tells me that it "cannot connect to Apple TV". I've read over dozens of articles explaining how to fix this and nothing works. Any idea what could be wrong?
MacBook
Pro, OS X Yosemite (10.10.3)