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OnePlus 7 Won’t Turn On repair
Machine model: one plus seven
Customer description: mobile phone no booting
Test results: mobile phone no booting, powered on short-circuit current.
Fault analysis: Check the appearance of the motherboard to see if there is any obvious corrode and the chip components are damaged.
OnePlus 7 Won’t Turn On repair Figure 1.
Power up the motherboard, touch the high temperature part of the motherboard, find that the small shielding cover high temperature is abnormal, and remove shielding cover.
OnePlus 7 Won’t Turn On repair Figure 2.
It is observed that Inductor under shielding cover has been damaged, and its pin position is badly burned.
OnePlus 7 Won’t Turn On repair Figure 3.
Smoke this part with Colophony (Solder), turn on the power to find Capacitor Short circuit next to Inductor, remove Capacitor, and repair the fault.
OnePlus 7 Won’t Turn On repair Figure 4.
