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A Huawei Nova 7se that had been heavily dropped failed to charge, which was caused by inductance virtual welding after detection. See how the professional repairman repairs the maintenance steps below!

First, measure whether the 5V voltage of the tail plug is normal, and consider whether the charging IC and U2 on the motherboard are burnt out together. Because it is a double-layer motherboard, we will separate the motherboard first, and then measure it in layers to see if there is any abnormality in the resistance voltage of the charging IC and U2.

Huawei Mate 40 Pro, say yesmobile phoneI can't hear the sound on the phone recently, which affects communication with others when answering the phone, but it is normal to play music. So, what is the problem with this Huawei Mate 40 Pro? Look at how the professional master operates below!

The measured voltage is not generated. The first step of starting is to convert the battery voltage into the main power supply. The measured resistance of the main power supply is normal and there is no short circuit. Then we directly disassemble a charging IC of the same model and install it. The specific maintenance process is as follows: