The iPhone 6 doesn't boot, and the boot current is 700mA. We need to fix it without delete the phone data.
Repair
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.
2. Open the phonecircuit diagram and check it, we can find that the diode
data of PP1V8_SDRAM is low.
3. Measure the diode data the PP1V8_SDRAM
with multimeter, the data only have around 100, it is
lower than normal data.
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 9-13-5. We directly pick
it off.
5. After remove it, measure the diode data
again, now the data is back to normal.
Finally, assemble the iPhone and test it,
now it can be successfully powered on and smoothly into the IOS system.
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