After the heavy fall of OPPO Reno Ace, the screen broke into a spider's web, and the screen was turned on black. After replacing the display, the fault was repaired.
HUAWEI Mate 30 has low boot brightness, and the screen is black when fast-forwarding the system. When disassembling the machine, it is found that the board layer is broken, and it is directly repaired by flying the wire.
HUAWEI Mate 30 can't be turned on, the CPU is damaged, and the fault is repaired after redoing the CPU.
Xiaomi 11 Youth an't start the machine, the CPU is virtually welded, and the fault is repaired after the CPU is redone.
Huawei P20 can't start the machine. After dismantling it, it was found that a charging tube was burnt out. After dismantling it, it was replaced with a new charging tube, and the fault was repaired.
HUAWEI P30 screen doesn't display, but the display seat is virtual welded, and the fault is repaired after welding the display seat.
HUAWEI Mate 30 has no ringtonel. Remove the upper board, replant the tin, and fix the fault.
Xiaomi 11 can't start the machine, which is caused by the common fault of virtual welding of CPU. Remove the temporary storage and CPU, plant tin and then weld it back to the motherboard, and repair the fault.
iPhone 12 Pro Max shows no service and no signal., make up the point on the upper board, and fix the fault.
