Repair guide for iPhone 6 shows iTunes error 9 and unknown error 56

The iPhone 6 shows iTunes error 9 and error 56, how can we fix it?

First, we need know what's going on this iPhone. It fell into ground accidentally, and then when we want to flash it, it shows these error code.

Then, analyze the cause of the failure. This kind of symptom is basically caused by CPU to logical chip and NFC chip disconnection. Because the main CPU chip on the motherboard and PCB base get a loose connection, which results in boot failure or flashing failure so that error code appears.

Flashing the device while reporting error 9, find out there is a test point with false soldering from chip to CPU, directly remove the tin above the CPU and solder at the logic chip position. As shown in picture 1-1.

Scraping the CPU off slowly and find the signal point to solder jumper wire. As shown in picture 1-2.

Soldering jumper on the position where the chip are connected, and the iPhone can be directly switched into the system after the connection is made up. After the customer go back for a few days, the device reported error 56 again, error 56 is caused by the broken wire from NFC to CPU or damaged NFC chip, firstly we remove the NFC chip. As shown in picture 1-3.

NFC chip is diconnected and most of solder points are dropped, it's all blank for the places without wire end, so soldering the useful two points with solder iron. As shown in picture 1-4.

Fill in the chip, then flash the iPhone 6 device, it finally can work perfectly.