HUAWEI nova 7 SE can't turn on the machine

HUAWEI nova 7 SE can’t turn on the machine

Machine model: HUAWEI nova 7 SE

Malfunction: HUAWEI nova 7 SE can’t start the machine after entering water.

Maintenance process: After you get your mobile phone, start the test, press the phone button, and the phone doesn’t respond, so it can’t be turned on.

HUAWEI nova 7 SE can’t turn on the machine Figure 1.

Take the motherboard out of the machine, take it to the microscope and observe it carefully. It is found that the motherboard is seriously flooded with water and has many corrosion places. Clean the corroded place slowly, and test the fault again.

HUAWEI nova 7 SE can’t turn on the machine Figure 2.

HUAWEI nova 7 SE can’t turn on the machine Figure 3.

So remove the power supply and WiFi chip with serious corrosion, and redo the power supply and WiFi chip.

HUAWEI nova 7 SE can’t turn on the machine Figure 4.

After the rework is completed, the power cord of the repair machine is turned on for testing, and the ammeter shows the normal jump to the turn-on current. Put the motherboard back in the phone, press the power-on button to turn on the screen, and the fault is perfectly repaired. Finally, according to the customer’s request, replace a new screen, and the repair is over.