My Apple TV is recently not being recognized by my TV. I have 3 HDMI inputs currently to the TV: 1) Dish TV 2) DVD player and 3) Apple TV. Whenever I turn on the TV, it automatically goes to the Dish TV input allowing normal TV viewing. Then if I want to switch to Apple TV viewing, I can either 1) use my iOS device and click on the input to TV icon or 2) use my Apple TV remote. In either case, the Apple TV turns on but the Dish TV input remains on. The input won't switch to the Apple TV feed. If I physically remove the Dish input from the TV, then the Apple TV feed will work. This has only been a recent development. It used to work fine in the past. I have not changed anything. What the heck is going on and how can I fix it?