Borrow a charging chip directly from another mobile phone of the same model to be repaired. After installing it, it is tested that the charging is normal, indicating that there is something wrong with the original charging chip of this machine, so replace the charging chip.
Get the mobile phone power-on test, click to turn on WiFi, and WiFi will automatically turn off. This should be a common problem of the CPU of Xiaomi 11, and the CPU should be observed first.
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.
Xiaomi 11 can't turn on WiFi, which is the common common failing of Xiaomi mobile phone CPU. After disassembling, redo the CPU and repair the fault.
Xiaomi mobile phone shoot 22501, redo the CPU fault repair.