Here are some steps you can take to troubleshoot the issue:

1. Check the power source to make sure it is properly plugged in.
2. Make sure your device has enough power and is not overheating.
3. Unplug the Smart TV and plug it in again.
4. Check if the Smart TV’s software needs to be updated.
5. Check if the Smart TV has any stuck buttons.
6. Reset the Smart TV to its factory settings.