The issue of the alarm on the Xiaomi Smart Kids Watch not ringing after the screen is turned off can stem from software, power management, or configuration-related factors.
To resolve this issue, please refer to the following methods:
1. Ensure that the alarm is properly set and that the correct time and repeat options are selected;
2. Check if a firmware update is available for the watch. Updates often fix known bugs and improve functionality;
3. Navigate to the power management or sleep mode settings on the watch. Ensure that the alarm function is allowed to work during sleep mode or screen-off periods;
4. If the problem persists, perform a factory reset. Be sure to back up any important data before resetting.
If none of the above steps resolve the issue, please contact the local after-sales service center for further assistance or potential repairs.