If your Xiaomi Cordless Hair Straightener Brush isn't turning on, please check the following steps:
1. Ensure the Travel Lock is disengaged. If it's on, the device won't power on for safety reasons;
2. Verify that the device is fully charged. If the battery is low, the indicator will flash orange. A fully charged device will have a solid white light;
3. Check that the hair straightener brush isn't in contact with water or any other liquid, as moisture can prevent it from functioning properly;
4. If the above steps don't resolve the issue, please reach out to the after-sales service for further assistance.