Find some methods on the Internet
Two methods:
1. Flash the machine and upgrade it to the latest or stable version. There are some risks. Remember to save important data,
At the same time, press the volume down key + power key to enter FASTBOOT mode for a period of time and then press the power key to reboot
2. After the battery is removed, the small electric board can be turned on immediately after it is installed. Or after 10 hours, the cell phone will be powered off, and the charger will be used for flushing and moving power supply, computer charge, the landlord believes me, I also have this problem, but just click the latest stable version.
3. There is no risk if you look for Xiaomi's after-sales outlets for repairs. The problem is solved free of charge within the warranty period! Either. You know! I hope you can adopt my answer as the best answer.