Here are five common problems with Apple TV and how you can fix them such as app stops working, glitchy, remote stops working, audio isn’t playing and not enough storage.
App stops working
To force close an app, double-press Apple TV or Home button swipe left or right to highlight the app and swipe up on the Siri remote touchpad.
Restart Apple TV by going to Settings > System > Restart, or by holding the Menu and TV button until the light on the front of the Apple TV begins blinking rapidly. When you release the two buttons on the remote, the Apple TV will restart.
Remote stops working
First try charging it via Lightning port along the bottom edge of the remote. If that doesn’t work, try to reset the remote by putting it into pairing mode by holding the remote close to the Apple TV and holding Menu and Volume Up buttons for two to three seconds.
Audio isn’t playing
Try restarting the television and any audio hardware connected to the Apple TV, such as a sound bar. If it doesn’t work, try restarting the Apple TV. Go to Settings > Audio and Video and ensure the correct speakers are selected for Audio Output and Audio Mode is set to Auto.
Not enough storage
Remove unused apps and games. Below are the steps to remove each app:
- Highlight the application you want to remove and long press on the trackpad until the icons begin to wiggle.
- Press the Play/Pause button.
- Select Delete.
- Click Delete once more to confirm.
Faster way to remove apps is to go to Settings > General > Manage Storage. Applications will be sorted in descending order by file size. Just click the trash can icon to the right of an app and click Delete to remove each app.
Source: CNet: 5 common problems with Apple TV and how to fix them