Why don't my Xiaomi mobile phone messages sort by time?

2. By default, the system does not sort by time;

3. Operation errors caused by not sorting by time.

? Xiaomi mobile phone fault analysis and maintenance method daquan

1, Xiaomi's mobile phone cannot be turned on after charging.

Diagnosis and maintenance: According to the analysis of fault phenomena, it may be a power circuit problem, a startup circuit problem or a short circuit of components in the circuit board.

1) Disassemble the mobile phone case, check and measure the battery pin power supply voltage, and the 3.7V power supply voltage is normal.

2) When the mobile phone is connected to an external power supply, it is found that the current is large, indicating that the circuit is short-circuited.

3) Short circuit of circuit board is usually caused by the damage of capacitors, inductors and other components. Check the filter capacitor and inductance near the battery interface.

4) After inspection, it was found that a capacitor not far from the battery interface was damaged. After replacement, start testing and troubleshooting.

2. Xiaomi's mobile phone can't be started for maintenance after it is broken.

Diagnosis and maintenance: according to the analysis of the fault phenomenon, it is estimated that the internal interface of the mobile phone is loose and the components are welded after vibration. Key inspection

Check the power supply circuit and the starting circuit.