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iPhone 7 After falling the mobile phone keeps restarting and troubleshooting
Machine model: iPhone 7
Malfunction: The phone keeps restarting.
Fault analysis: There are several possibilities of frequent problems when the mobile phone is restarted continuously: First, the battery VCC is abnormal; Second, the BUCK circuit VCC of CPU is abnormal; Third,VCC works unstable.
Maintenance process: the mobile phone is online, and the battery data can be displayed normally on i4. After replacing the battery, the restart phenomenon will still occur. Next, check the BUCK circuit VCC of CPU.
iPhone 7 After falling keeps restarting and troubleshooting Figure 1.
It can be seen in the figure that the BUCK circuits of CPU are all connected by Inductor, so could it be caused by dropping Inductor after falling? Check it with Inductor. As a result, in the process of Inductor, several Inductor really fell off and replaced Inductor.
iPhone 7 After falling keeps restarting and troubleshooting Figure 2.
iPhone 7 After falling keeps restarting and troubleshooting Figure 3.
Start the test for two days, restart the problem and fix it.
