How to fix TV sound distortion or noise problems on the Mi TV 4 55?

When encountering sound distortion or noise problems on your Mi TV 4 55, you can try the following troubleshooting steps to resolve the issue:
Scenario 1:
If the issue occurs when you are using apps on your TV, please refer to the following methods:
1. Some apps have their own audio settings. Check if the app you’re using has any specific settings for adjusting sound;
2. Ensure that the output is correctly set by going to [Settings] >> [Device Preferences] >> [Sound] >> [Speakers] >> [TV Speakers] or [S/PDIF];

3. Turn off the TV, unplug it from power, wait for a minute, and then plug it back in and turn it on;
4. Make sure that your TV's system is the latest version by going to [Settings] >> [About] >> [System Update]. If available, install the updates;
5. If the problem persists, you can perform a factory reset by navigating to [Settings] >> [Device Preferences] >> [Reset]. Be aware that this will erase all data and settings on your TV, so make sure to back up anything important before doing this.