my Apple TV says it cannot connect to my internet

have had Apple TV for over a year.....today it stopped working in the middle of viewing a program I rented....said nothing was connected to my internet.

I reset the Apple TV device to factory settings and was trying to get it re-set up.

Again it is telling me it cannot connect to my WiFi....which it has been connected to for all the time I've had it.

I even re-typed in the WiFi name and the passcode....and it is still telling me it cannot connect.

My iPhone,Mac Book, and iPad are all connected to this WiFi