Disassemble the motherboard, open the shielding cover, and find that several inductors have fallen off, and several inductors on the edge of the power chip have fallen off by virtual welding. Considering that the CPU is prone to virtual soldering after the mobile phone falls heavily. So take off the CPU, the current on the single board is normal, and put the CPU back.
After HUAWEI Mate 40 Pro Fall hard, WiFi and Bluetooth can not be connected. Connect Crystal pin with WiFi connection point by cable, and reset welding motherboard to repair the fault.
After HUAWEI Mate 40 Pro Fall hard, the screen and shell glass cracked into spider webs. After dismantling the machine,Inductor was replaced and the CPU was replaced. The mobile phone can be turned on.
HUAWEI Mate 40 Pro starts screen is black or frozen，Scraping out the wiring,Jump wire is connected to PAD, and welding small board is renewed,the fault is repaired.
HUAWEI Mate 40 Pro fingerprint function does not work, short Connect the power supply sense pin, fault repair.
Huawei Mate 40 Pro mobile phone has no fingerprints. Looking at the bit map, it is judged as insurance, and the fault is solved after direct short connection.
