HUAWEI Mate 40 Pro fingerprint function cannot be used for repair

Machine model: HUAWEI Mate 40 Pro

Fault phenomenon: the function of fingerprint cannot be used.

Maintenance process: after startup test,fingerprint option was not found in the “biometric and password” interface, indicating that fingerprint function cannot be used.

HUAWEI Mate 40 Pro mobile phone fingerprint cannot be used Figure 1.

fingerprint ound that one of the components on the BTB connector was removed from the BTB connector.By looking at Xinzhizao Soft Boardview, it is found that this is an Fuse Inductor connected to fingerprint.

HUAWEI Mate 40 Pro mobile phone fingerprint cannot be used Figure 2.

HUAWEI Mate 40 Pro mobile phone fingerprint cannot be used Figure 3.

When repairing this kind of small Inductor, one can be removed from other mainboards for repair, and the two pin welding of Inductor can be used for short-circuit.

HUAWEI Mate 40 Pro mobile phone fingerprint cannot be used Figure 4.

Short Connect the power supply sense two pin, and then start the test.The fingerprint option appears in the “biometric and password” interface, indicating that the fingerprint function of the mobile phone is restored and the fault is repaired perfectly.