Failure phenomenon: One iPhone6P is replaced with a broken screen, 2A large current does not display
Analysis of ideas: The large current on the boot is generally caused by a set of voltage short circuits.
Xunwei Express Repair engineers disassembled the voltage resistance values of each group, and found that the voltage of the PP_CPU voltage to the ground was 0.
From the PCB diagram, we can see that the group of PP_CPU voltage is power supply to CPU U0201 through the power source U1202, and Xunwei Fast Repair engineers measure the voltage of PP_CPU after removing the power supply U1202.
After replacing the U1202, the power was normal and the fault was successfully repaired.
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