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iTunes Error 14 Occurs On iPhone 6S Plus—What to do?

There is an iPhone 6S Plus need to be repaired, the fault reflected by iPhone user is that there is no serial number when flash iPhone with iTunes, and the iTunes reports unknown error 14, 4013 and so on. According to the description, we suspect that it's an iPhone Nand flash problem.


Connect iPhone to computer with lightning cable, use iTunes to flash iPhone, the iTunes reports that the iPhone "iPhone" could not be restored. An unknown error occurred (14).

Disassemble the iPhone, take out the iPhone motherboard, and then carefully remove the iPhone Nand flash. Check iPhone bitmap on WUXINJI Dongle, and then measure the diode data with multimeter, we found that the resistance value of iPhone Nand flash solder pad M6 Pin is infinitely large.


This pin passes through the R1501 resistor and pulls down, there is no resistance value when measured it with Fluke 15B+ Digital Multimeter, now we're judging that the R1501 resistor is damaged.

Use QUICK 861DW hot air rework station and tweezers to replace the R1501 resistor, and then measure the resistance value of iPhone Nand flash solder pad M6 Pin again, the data is normal.



Install the iPhone Nand flash to iPhone motherboard, now the flash is finished successfully. The iPhone 6S Plus fault has been repaired.
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