HUAWEI Mate 30 Pro is not powered on for repair

Machine model: HUAWEI Mate 30 Pro

Fault phenomenon: mobile phone no booting.

Repair process: the customer changes the mobile phone screen by himself, and then the mobile phone no booting.

HUAWEI Mate 30 Pro is not powered on for repair Figure 1.

HUAWEI Mate 30 Pro is not powered on for repair Figure 2.

Remove the machine, take out the motherboard, found charging connector near the traces of repair.The power on current is normal. If you button on the battery and press the power on button, the logo on the motherboard will light up for a few seconds, and screen is black or frozen will turn on. If you press the power on key again, the situation is still the same.Plug in the charger, and the screen repeatedly lights up the logo, indicating that this is a restart state.

HUAWEI Mate 30 Pro is not powered on for repair Figure 3.

HUAWEI Mate 30 Pro is not powered on for repair Figure 4.

HUAWEI mobile phones in this situation, the common fault points are: 1, encryption battery;2. Non galvanic battery;3. Battery damage;4. No battery is detected in pin;5.RAM is damaged.

The reason is that the mobile phone no power on no booting is caused by changing the screen. At the same time, Huawei mate 30 Pro uses encryption battery, so it is OK to replace a decryption battery.Turn on the screen and repair the fault.