To troubleshoot the pixelated or distorted picture on your Smart TV:

1. Check your internet connection to make sure you are getting enough speed to support high-resolution pictures.
2. Check for any loose cables connected to your TV or external devices, such as set-top boxes, DVD players, or gaming consoles.
3. Look for any sources of interference such as other wireless devices, like cell phones, within a few feet of your device.
4. Try resetting the connection or power-cycling your device.
5. Update the frequency settings on your device.