The Xiaomi TV Stick 4K comes with a remote control. Under normal circumstances, the remote control button should be responsive.
To fix the button failure on your Xiaomi TV Stick 4K remote control, you can try the following steps:
1. Check the batteries to make sure they are installed correctly and have sufficient power. If they are low, replace them promptly;
2. You can try re-pairing the remote to the TV Stick to resolve the button issue;
3. You can also try cleaning the remote control. Dust and debris can easily accumulate under the buttons on the remote control. Wipe the remote control with a soft cloth, gently pressing each button to remove dust and make the buttons sensitive again;
4. You can try updating the firmware to ensure your TV Stick has the latest firmware update;
5. If the issue persists after these steps, please contact after-sales service for assistance.