Xiaomi 11WiFi can’t be turned on, and the sound is noisy (CPU virtual welding)

Xiaomi 11WiFi can’t be turned on, and the sound is noisy (CPU virtual welding)

Xiaomi 11 uses the CPU of Snapdragon 888, and this CPU is particularly prone to virtual soldering, which leads to failures such as no sound, no WiFi, and no boot.

“Machine model” Xiaomi 11

[Fault] WiFi can’t be turned on, and the sound is noisy.

[Maintenance process] I received a machine sent by a customer for repair, the model is Xiaomi 11, and the fault is that WiFi does not work and the sound is noisy.

Xiaomi 10 WiFi can’t be opened, and the sound is noisy. Figure 1

When I received the description of the machine, I knew the problem. Xiaomi 11 used the CPU of Snapdragon 888, and this CPU was particularly prone to virtual soldering, which led to failures such as no sound, no WiFi, and no boot. Now there are two failures in this machine at one time, and the high probability is caused by virtual soldering of the CPU. Then we directly report the risk to the customer to become a CPU.

Xiaomi 10 WiFi can’t be opened, and the sound is noisy. Figure 2

After finishing CPU, I found that WiFi returned to normal, and the noise disappeared, indicating that the fault was still repaired.

Xiaomi 10 WiFi can’t be opened, and the sound is noisy. Figure 3

[Maintenance Result] Install the motherboard into the.mobile phoneIn the power-on test, the mobile phone is turned on into the system normally, and the functions of charging, WiFi, sound, compass, vibration, telephone and so on are normal. The maintenance is over here.