First, you can use the remote.
1. Open the Settings app, which has an icon that looks like a gray gear.
2. Scroll down to and click on "System."
3. Select "Restart."
1. Open your Settings app.
2. Open the "General" menu.
3. Scroll to and click on "Restart."
If for some reason your remote isn't working and you can't use it to restart your device, instead unplug your Apple TV, wait for six seconds, and then plug it back in.