Huawei nova 6 serviecs can't be repaired by phone

Huawei nova 6 serviecs can’t be repaired by phone.

Machine model: Huawei nova 6
Customer description:Fall hard before the mobile phone, the screen has been changed, and the card has no signal.
Malfunction: mobile phone card no serviecs.
Actual measurement result: No signal from card insertion.
Fault analysis: Focus on the original cause of the fault.Fall hard changed the screen, because Huawei nova 6 is a dual-layer motherboard. All the faults of the dual-layer motherboard due to physical reasons are basically caused by Inveracious Soldering pad break off in the upper middle layer and the lower layer. This has become common failing of dual-layer motherboard.

Huawei nova 6 no serviecs can’t answer the call for maintenance Figure 1.

Huawei nova 6 no serviecs can’t answer the call for maintenance Figure 2.

With Xinzhizao Soft Boardview, it is found that there are many signal transmission lines between Baseband motherboard and system motherboard that are bridged by the middle board.

Huawei nova 6 no serviecs can’t answer the call for repair Figure 3.

When the motherboard Fall hard is used, the bridge between Baseband motherboard and the system motherboard will be disconnected, and finally there will be many signal-related faults, such as no Baseband Version, no 2G, no 4G, no 5G, no WiFi, no Bluetooth,no serviecs and so on. This is also the signal common failing of Huawei nova 6 and other dual-layer motherboards.

Huawei nova 6 no serviecs can’t answer the call for repair Figure 4.

In fact, the performance of this fault is obvious, and the theory is very simple. It is mainly caused by the disconnection of high, medium and low frequency transmission lines in Baseband signal part. There are many similar cases on our Xunwei network, and we are on the spot. trainingIn the course, this part of the content is also explained emphatically.
The main test of this maintenance is manual operation, which requires patience and meticulous operation. The upper, middle and lower layers of the mobile phone are separated, and the signal points of Fall hard Inveracious Soldering pad break off are patch-connected. Finally, the welding three-layer motherboard can be repaired perfectly.