What to do if you fail to cast the computer to the Mi TV 4S 65?

If you are experiencing issues while trying to cast your computer to the Mi TV 4S 65, there are several methods for your reference to troubleshoot the issue:
1. Ensure that both the computer and your TV are connected to the same Wi-Fi network;
2. Ensure that there's no interference in the wireless signal. Physical obstacles or other devices can sometimes disrupt the Wi-Fi connection. Move closer to the router or eliminate potential sources of interference;
3. If you're using a wired connection between the computer and TV, ensure the cable is properly connected and in good condition;
4. Verify the cast compatibility with your computer. Some computers may not have built-in cast feature;
5. Sometimes, simply restarting both your TV and external device can resolve connectivity issues;
6. Check for TV firmware updates by navigating to [Settings] >> [Device Preferences] >> [About] >> [System update];
7. As a last resort, you can try performing a factory reset on your TV. Navigate to [Settings] >> go to [Device Preferences] >> select [Reset]. Be aware that this will erase all your settings and data, so make sure to back up any important data before proceeding. 
We hope the above methods can resolve the issue. If the issue still persists, you could submit your feedback on your TV by going to [Settings] >> [Device Preferences] >> [Home screen] >> [Send feedback].