Xiao mi 11 WiFi can’t use fault maintenance

Xiao mi 11 WiFi can’t use fault maintenance

Xiao mi 11 WiFi can’t be used. This kind of fault can still be said to be a common fault of Xiaomi 11. The pot of Snapdragon 888 is likely to be a fault caused by CPU virtual welding. The specific maintenance process is as follows:

“Machine model” Xiao mi 11

[Fault] No WiFi

[Maintenance process] I received a machine sent by a customer for repair, the model of which is Xiaomi 11, and the customer described it as WiFi.

Xiao mi 11 has no WiFi Figure 1

get mobile phone Test, found that WiFi can be turned on but can’t find any network. Testing Bluetooth can be used normally, and this kind of fault can still be said to be a common fault of Xiaomi 11. The pot of Snapdragon 888 is likely to be a fault caused by virtual welding of CPU, so it directly reports the risk to the customer to be a CPU.

After obtaining the customer’s consent, directly remove the motherboard dry CPU. Here is a data. The current of a single CPU without a cover is that the current rises to more than 200 and then drops to about 130-150. The specific motherboard is analyzed. The current is only for reference, and there is no fixed standard. Please refer to it.

Xiao mi 11 has no WiFi Figure 2

With the upper cover installed, the current can jump up to 2-300mA, because the battery is encrypted, so the single board can only be powered up so much. We installed the test directly, and found that WiFi can be turned on and used normally after booting.

Xiao mi 11 has no WiFi Figure 3

[Maintenance result] Install the motherboard into the mobile phone, and start the test. The mobile phone is normally booted into the system, and the functions such as charging, WiFi, voice, compass, vibration and telephone are normal. The maintenance is over here.

This case was originally provided by Xun wei Quick Repair Flagship Store, and it is forbidden to reprint without authorization!