Skip to main content

Step by step fix iPhone 6 Plus iTunes error 40

The iTunes error 40 occurred on iPhone 6 Plus after expanding,  the fault details are that after using NAVIPLUS PRO3000S programmer to expanding the iPhone 6P Nand flash,  the iPhone 6S failed to restore and reports unknown error 40,  we are going to fix step by step.



Step 1

Restore the iPhone 6 Plus again. Connect iPhone 6P to the computer with iPhone lightning cable, and then use iTunes to restore, after a while, the iTunes reports unknown error 40 and failed to restore.

Step 2

Disassemble the iPhone 6P. Use 3D Precision screwdriver to remove the screws next to the iPhone lightning port, and then put iPhone 6P on the CPB screen separator, after a while, open the iPhone display assembly, and then take out the iPhone motherboard.

Step 3

Measure the iPhone Nand flash. Because the iPhone Nand flash has been replaced, so now we need to remove the iPhone Nand flash, and then use digital multimeter to measure the resistance value of the bottom pin. After measurement, we found that the 6 pieces pins are no resistance value, the normal value should be more than 500.

Step 4

Check iPhone 6 Plus schematic diagram. Open ZXW dongle to check the iPhone schematic diagram, we know that these 6 pins are connected to the iPhone CPU directly.

Step 5

Measure the iPhone motherboard. Use a clip to fix the iPhone CPU, and then use digital multimeter to measure the resistance value of the iPhone Nand flash bottom pin, but there is still no resistance value, which means the layer board is disconnected.

Step 6

Repair the iPhone motherboard. Remove the SIM card tray, and start to use BGA blade to graver the layer board, and then measure the bottom pin again, now those pins all have value.

Put iPhone motherboard under the microscope, and then use QUICK 861DW hot air rework station to solder a jumper wire on it, and then apply some green UV oil to fix it. Now use digital multimeter to measure the resistance value, the data tested is back to normal value.

Step 7

Install the iPhone Nand flash. Attach iPhone Nand flash to the MJ 3D BGA reballing stencil, apply some solder paste to it, and then re-weld it, and then install the iPhone Nand flash to the iPhone motherboard.

Step 8

Test the iPhone 6P again. Connect iPhone to the computer, and use iTunes to restore it to test, the restore process is going successfully, no unknown error appears.

Now we can install the SIM card tray, assemble the iPhone 6 Plus. After using it for several days, all functions are working well.

Comments

Popular posts from this blog

Complete Guide to Replacing Your iPhone Battery at Home

  Has your iPhone battery started showing the dreaded signs of age, like frequent charging, rapid draining, or even an untimely shutdown? Are you considering a battery replacement but feeling deterred by the potential cost or hassle of a trip to the Apple Store? Don't worry; with the right guidance, you can replace your iPhone battery at home quickly and safely, sparing your wallet and ensuring a future of longer charge cycles for your beloved device. Whether you have the latest model or an older version, we'll walk you through the process step by step. But before we get into the nitty-gritty, here's why a battery replacement might be in your best interest. Why You Should Replace Your iPhone Battery The lithium-ion batteries in our smartphones are not immortal. They degrade over time due to a variety of factors, such as age, temperature, and the number of charge cycles. Replacing an old battery can provide several benefits: Improved Performance: A new battery can result ...

User Manual: JC V1 Programmer to fix iPhone light sensor/vibrator

As we know, the light sensor and vibrator is very important for iPhone screen. If you want to replace the iPhone screen, you also need to transfer the original screen data to the new iPhone screen(iPhone 8 to iPhone Xs Max),so you can make sure the new iPhone screen will work fine. Here is a  JC V1 programmer  to fix iPhone light sensor and vibrator problem (for iPhone 7- iPhone Xs Max), it also can repair iPhone baseband eeprom IC or iPhone logic eeprom IC problem. The JC V1 Programmer comes with 24-inch HD display screen, three-color LED indicator light, two small connecting seats (for connecting function panel) , two buttons and one function panel (including light sensor/touch connector, baseband function connector, vibration connector) It support 2 languages (Chinese/English) and three lines of code (read/write/burn/save), the function panel can be changed, the software can automatically update What’s the functions? - Repair iPhone Light sensor/ true ...

Here: JC P11 iPhone Nand Test Fixture Specification Details

JC P11 iPhone Nand test fixture is on sale now, some users still confused for it, what's credit points for JC P11? Why it's cheap? As we know, JC P11 BGA110 programmer is the latest programmer for iPhone   iPhone XS Max,XS, X, 8P, 8  and iPhone 11 Pro max/pro/11, which is made by JCID factory.  Here are some  specification details for JC P11 programmer . 1. Main Functions. - Support to modify and write BGA110 NAND SYSCFG data (NAND Flash underlying data, such as SN/BT/WIFI and others); Unbind WIFI. - It doesn't require restoring the firmware for brand-new Nand flash, the SYSCFG data can be written directly. - Repair the Error 35 during firmware restoring for BGA110 NAND - Repair the DATA Error for BGA110 NAND - Support iPhone 8/8P/X/XS/XS Max currently, free software upgrade to support 11-11Pro Max in the future - Initiate the network charging mode, can purchase the points according to the demand, which greatly saves the equipmen...