Xiaomi 10 Youth cannot be turned, charges after activating the battery, the phone is hot, disassembled and silicon grease is applied and the fault is fixed.
HUAWEI P40 Pro slow charging, fast power consumption, smoked rosin found the camera power supply chip is damaged, replace the camera power supply chip, the fault is fixed.
iPhone 12 Pro Max can't be turned on, layered motherboard burns, replaced damaged capacitors, fault fixed.
OPPO R9s Plus can't be charged, cut off the shield at the top right corner of the CPU, remove U2901, fault fixed.
OPPO A35 water damage can't be charged. When the charging IC is replaced, it will prompt "abnormal charging".Repeat welding is the main power supply, and the fault is repaired.
HUAWEI Mate 30 Pro couldn't connect to WiFi. It was found that two GND of Crystal were dropped. After replacing Crystal, the fault was fixed.
Redmi Note 9 can't be charged and turned on, and Repeat welding battery chip can be repaired.
Honor 20 auto restart, replace CPU RAM, and fix the fault.
HUAWEI Mate 30 has no sound after connecting Bluetooth. After making up the phone, the WiFi chip is replaced, and the fault is fixed.
