Huawei Honor 30 Pro Won't Turn On repair

Huawei Honor 30 Pro Won’t Turn On repair

Hello everyone: Welcome to the Xunwei case sharing, today we will discuss the maintenance ideas of Huawei Honor 30 Pro.
Machine model: Huawei Honor 30 Pro

Customer description: no booting after the phone fell.

Test results: mobile phone Won’t Turn On, power-on current Current protection.
Fault analysis: The power-on current Current protection is usually caused by Short circuit, or the input and output of the power supply chip are abnormal.
First, check whether the appearance of the mobile phone is obviously damaged, and move the Capacitor,Inductor and Inveracious Soldering loose.

Open the Xinzhizao Soft software again, find the Honor 30pro label map,Boardview, schematic, and find the power chip.

Huawei Honor 30 Pro Won’t Turn On repair Figure 1.

Huawei Honor 30 Pro Won’t Turn On repair Figure 2.

Huawei Honor 30 Pro Won’t Turn On repair Figure 3.

Because the power chip is under the Baseband motherboard, it must be measured after the separate. You can first measure the VCC that does not need the separate, and no fault point is found, and then perform the separate on the motherboard. After separate, check the peripheral components of the power chip, and found that the 0.75V and 0.8V of the CPU V separate are loose, after separate, the fault is repaired.