If your Xiaomi Watch S1 Pro doesn’t light up, please refer to the following steps to troubleshoot the issue:
1. Press the [Home] button to light up the screen. You can try pressing the button again to check if the watch lights up. Inspect the button and surrounding area for any signs of physical damage;
2. Ensure that your watch has enough battery charge. If the battery is low or drained, connect the watch to its charger and allow it to charge for at least 30 minutes before attempting to turn it on;
3. Inspect the device for any physical damage such as cracks or water damage;
4. Press and hold down the [Home] button for 15 seconds until you see options to power off, restart and reset. Select [Restart] and wait for the watch to reboot;
5. Please check if the watch’s firmware is updated to the latest version by opening the Mi Fitness app and going to [Device] >> [Update].
If the above troubleshooting methods can’t resolve the issue, please contact our local official service center or your seller for further assistance. They will help you in this regard.