Retain Data and Fix the Cannot Boot iPhone 6
The iPhone cannot boot is a common problem, but it is the painful situation too for people. It can be a big problem since you can't access the iPhone in any way. When someone send message or call, you are disappeared. Maybe many of people have also encountered such endless iPhone reboot cycles. Your iPhone keeps restarting itself every 10-15 seconds, and never returns to the phone Home screen. This article explains the causes of the iPhone cannot boot and offers the solutions to fix this all too common problem.
Phone fault: The iPhone 6 doesn't boot, the boot current is 700mA. Picture 1-1
Fix process:
1. Disassemble the iPhone by phone opening tools, take out the iPhone motherboard. Connect it to DC power supply, the boot current shows 700mA, which means there is a power supply short circuit. Picture 1-2
2. Open the phone circuit diagram and check it, we can find that the diode data of PP1V8_SDRAM is low. Picture 1-3
3. Measure the diode data the PP1V8_SDRAM with multimeter, the data only have around 100, it is lower than normal data. Picture 1-4
4. According to the repair experience, this group abnormal power supply was caused by damaged capacitor at lower right corner of iPhone CPU. As shown in picture 1-5. We just pick it off.
5. After remove it, measure the diode data again, now the data is back to normal. As shown in picture 1-6.
6. Finally, assemble the iPhone and test it, now it can be successfully powered on and smoothly into the IOS system. Picture 1-7.
More information about phone repair guides and tools, you can choose Vip Fix Shop Team.
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