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iPhone 7 always shows charging, mobile phone Won’t Turn On repair
Machine Model: iPhone 7
Fault phenomenon: charging is always displayed, but the mobile phone Won’t Turn On
iPhone 7 Mobile phone Won’t Turn On fault maintenance Figure 1.
Repair process: this mobile phone changed the screen before, disassembled the machine and connected it to the DC power supply short-circuit current 668mA, the short-circuit current was too large, and the battery could not be charged.
iPhone 7 Mobile phone Won’t Turn On fault maintenance Figure 2.
Take down the motherboard, observe around the screen interface and find that the C3828 Capacitor on the PP_VDD_BOOST VCC is missing an pin.
iPhone 7 Mobile phone Won’t Turn On fault maintenance Figure 3.
Directly remove the short-circuit current.
iPhone 7 Mobile phone Won’t Turn On fault maintenance Figure 4.
iPhone 7 Mobile phone Won’t Turn On fault maintenance Figure 5.
The installation test, the boot is normal, the function is normal, the maintenance is over, this fault is the short-circuit current caused by the damage of the C3828 Capacitor.
iPhone 7 Mobile phone Won’t Turn On fault maintenance Figure 6.
