If your Xiaomi Cordless Hair Straightener Brush isn't working after turning it on, follow these steps to troubleshoot:
1. Listen for a sizzling or hissing sound, which indicates that the negative ion function is working. If you don't hear it, there will be an issue with the device;
2. Verify if the temperature level indicators are flashing. By default, the device starts at level 2 when powered on. Flashing indicators mean the device is in the heating process;
3. Check the appearance of the device for any signs of drops, impacts, or other physical damage that will have affected its functionality;
4. If none of the above issues apply and the device still doesn’t work, please reach out to the after-sales service for further assistance.