all my apple devices connect to wifi except appletv

yesterday my apple tv stopped working in the middle of a movie. I says it cannot connect to my wifi, can't see the wifi signal (signal strength = no bars), and can't fine the wifi network name when I type it it.

Our macpro, macair, 2 ipads, 2 iphones all "see" the internet thruogh the same Time Capsule wifi that Apple TV normally uses-- the only wifi in our house