Follow these steps to try to fix a frozen or unresponsive Smart TV:

1. Unplug the TV from the wall and allow it to rest for one minute before plugging it back in.
2. Check the HDMI cable connection.
3. Check if the issue is isolated to a particular source.
4. Check that the internet connection is strong and stable.
5. Check if the issue is a result from an update.
6. Reset the TV to factory settings.