An iPhone 8P fell into the water last night，and then the
iPhone 8 Plus won't turn on. The customer sent it to us in the next morning,
after we received the iPhone, seems there are many water coming into the iPhone.
The customer told us that the iPhone doesn't important, just want to extract
the data from iPhone. Now, we are going to fix it.
Take out the iPhone motherboard, clean it up and dry it. After drying
please don't supply power to it, we need to observe that which position has
more water, so we can avoid burning other circuit components because of the
power supply.
After checking, we found the area that was
seriously damaged by water, there are 6 pieces capacitors on the left corner are
corroded, directly remove it by the brush. Because they don’t affect the boot
of the iPhone, so we don't need to deal with them now.
Put iPhone under the Trinocular Integrated Microscope, we found these two capacitors also was
burned, after testing, they all in short-circuit status. Open the ZXW Dongle to check iPhone schematic diagram, we know
that the C4910 leads to the iPhone ringtone amplification U4900, and the C3310
leads to the iPhone charge tube U3300. Check these 2 ICs, there are no trace of
water, possibly is these 2 ICs are damaged.
Take these capacitors out and test the
iPhone motherboard, the iPhone layer board doesn't short, re-fill these
capacitors, and then test it with DC power supply, the boot current tested is normal. After
dry out the iPhone display screen, connect it to the iPhone, and then power on
iPhone, the iPhone screen can be lit, but it turns darkness gradually.
Replace it with the new iPhone display screen, and test it again, now the iPhone screen
works properly, and all functions tested are normal.
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