A customer sent us an iPhone 6 to repair, the fault described is that the iPhone 6 reports 4013 error when flash it with iTunes.
Frist, connect iPhone 6 to the computer with iPhone lightning cable, and then use iTunes to flash iPhone again, we found the white Apple logo appears properly but can't enter the normal mode and reports unknown error 4013.
The iPhone 6 reports 4013 error is usually caused by iPhone Nand flash or CPU problem. In this case, frist we need to remove the iPhone Nand flash, and then use iTunes to re-flash the iPhone, finding that the iPhone can enter the normal mode and report 40 error, seems it's the iPhone Nand flash problem.
The iPhone 6 reports unknown error 40 is normal thing when the iPhone Nand flash is not installed. Use JC Pro1000s Nand problem to read the data of the original iPhone Nand flash, and then write this data to the new iPhone Nand flash, but we found the data of the iPhone Nand flash couldn't be read.
Therefore, we can only use the iPhone IMEI to find the original iPhone Nand flash SN, BT and WIFI address. After find out this information, use iPhone Nand test fixture to write these data to the new iPhone Nand flash, and then install Nand flash to the iPhone logic board by QUICK 861DW hot air rework station.
Assemble the iPhone 6, re-flash the iPhone via iTunes, the flash process goes well. Activate iPhone and test it, all functions are working properly, the repairs end!
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