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Huawei Nova 5Pro sim card no serviecs repair
Machine model: Huawei Nova 5Pro
Customer description: mobile phone water damage, plug in SIM no serviecs.
Test results: the mobile phone can be turned on, all functions are normal, and the mobile phone is plugged into SIM no serviecs.
Fault analysis: the fault caused by water damage. It should be water damage that causes the damage of signal part component chip water damage.
First remove the motherboard and observe the obvious water damage corrode part of the motherboard. After observation, it was found that there were obvious Short circuit burning marks on the filter chip and its periphery of the motherboard.
Huawei Nova 5Pro sim card no serviecs repair Figure 1.
Open Xinzhizao Soft, find Boardview of Huawei Nova 5Pro, and find that A1-A4 pin bits of this chip are connected to CPU and power chip.
Huawei Nova 5Pro sim card no serviecs repair Figure 2.
The C1-C4 pin bit of this chip is connected to ANT BTB connector. According to the current situation, this chip has been damaged, and this chip can be installed without installation. After the chip is removed and the motherboard is cleaned, it will be installed for testing and fault repair.
