There could be a few reasons why your Smart TV is making a humming or buzzing sound:

1. Check the sound settings on your TV. Most TVs have settings to adjust the volume, audio output, surround sound, audio mode, and more. Make sure these settings aren’t set too high.


2. Check the connections of your speakers, audio-visual cables, and other accessories. Make sure the connection are properly secured and not loose.


3. Try using a power surge protector for your TV and accessories. Unstable power can create hum or buzz.


4. Check the indoor fan settings. If you have a fan set up in your home, it may be causing the hum or buzz.


5. Move away from other electrical devices. Move your TV away from electrical devices that could be causing interference. Try turning electrical devices off and see if that reduces the hum or buzz.