1. The system is faulty or infected. The problem of not being able to boot should first be considered whether it is a system and virus problem. This type of failure is usually resolved by resetting the system or wire-brushing to the latest version of the system.
2. Reset the system. In the case that the system cannot be powered on, the system usually enters the recovery mode to reset. Power off first, then hold down the power button and the volume button at the same time. After entering, select Clear all data and restart to reset.
3. Wire brush. Connect the mobile phone to the computer, press and hold down the power button and volume button at the same time to enter the recovery mode, download and install the Mi Assistant on the computer, select Refresh, and then download the latest system refresh according to the prompts.
4. Hardware problems. Generally leading to such problems is the battery problem, the battery voltage is not enough to meet the requirements of the mobile phone, of course, it will be stuck in the boot interface can not enter the system. Xiaomi mobile phones are particularly serious about battery consumption, and it is easy to have such problems over a long period of time.
5, for the battery problem strong hands-on ability can consider trying to repair. The commonly used methods are: first, remove the battery with an eraser wipe the metal contact; Second, wrap the battery tightly with plastic wrap and put it in the refrigerator for a day or two. Third, discharge the battery and then charge it.
6, the most fundamental battery problem is to directly replace the battery. You can directly go to the after-sales point to let the repair master change a battery, you can also buy a piece of your own, cheaper.