Follow these steps to fix voice commands not working on your Smart TV.

1. Check your microphone: Make sure the sound on both your TV and remote are turned on and that the remote's microphone is not blocked.
2. Check your TV settings: Ensure that your TV is set to recognize your voice commands in the settings menu.
3. Check your internet connection: Your TV's network connection may be malfunctioning. Test your connection and see if Wi-Fi is turned on.
4. Reset your streaming service: Log out of your current streaming service and log back in.
5. Restart your TV: Turn the TV off and wait two minutes before turning it back on and trying the voice command again.