When the mobile phone is turned on, the flower screen is found. Due to the universal tin-planting steel mesh, the CPU is removed again, and several spots are found to be soldered. After reinstalling the CPU, the mobile phone is turned on normally, and all functions are tested normally. The maintenance is over here!
HUAWEi Mate 20 Pro restarts automatically from time to time, and the CPU has a common fault of virtual welding. The fault is repaired after the CPU is redone.
iPhone 12 Pro can't hear the voice of the other party when calling. Replace a receiver and fix the fault.
HUAWEI Mate 30 can't connect WiFi. Clean the corroded place first, then replace the WiFi chip and fix the fault.
Xiaomi K40 can't be turned on, and the CPU has a common fault of virtual welding. The fault is repaired after the CPU is redone.
HONOR Play3 screen does not display, and the fault is fixed after replacing backlight diode.
HUAWEI P20 can't be turned on. Remove the short-circuit capacitor and repair the fault.
HONOR 20 can't be charged, and the fault is repaired after replacing the battery.
iPhone 12 can't connect WiFi. Use a polishing pen to polish the middle layer pad, plant tin in the middle layer, and fix the fault.
