iPhone 5S iTunes reports unknown error 40 when updating firmware

In today’s world, people are constantly on their mobile devices. U.S. consumers spend an astounding 5 hours per day on mobile technology. We’re reliant on our phones for everything from business to pleasure.

Customer said that iPhone 5S iTunes reports unknown error (40) when updating firmware.

As the matter of computer system software, when rooting, different computer may have different circumstances. After receiving iPhone and rooting it, I find that when the progress bar goes about one tenth, as shown in picture 7-16, it reports error40.

Judging from my repair experience, when the progress bar goes about one tenth, it reports error40, which may be related to EEPROM. Next, remove motherboard and pry up EEPROM, as shown in picture 7-17.

Use EEPROM testing jig to test EEPROM, finding no series number in EEPROM, as shown in picture 7-18. Thus I know that the EEPROM is damaged.

I am preparing to replace EEPROM. As the series number is stored inside
EEPROM, at the same time, I have to replace the series number too. Because the original EEPROM is damaged, I cannot know the series number from original EEPROM, so I have to search the series number through original motherboard IMEI. The method of getting motherboard IMEI without touch any chips is as below:

Remove a EEPROM from a workable motherboard and assemble it on the faulty motherboard to root. When the activation interface is shown, clicking the icon that resembles exclamation mark, we can see the IMEI. Now I can search the series number through original motherboard IMEI and write series number into the workable EEPROM, the operation interface is shown in picture 7-19.

After writing the series number, I root again and the rooting goes smoothly. Trouble is removed.

Comments

Post a Comment

Popular posts from this blog

Slove iPhone X Won't Turn On

Image
Customer delivered a iPhone X and described the fault is not to boot after the phone drop accidentally. It reports error 56 when restore the iPhone X. How to repair this fault? Because iPhone X is the two board connected through the middle column, it is easy to drop the point. It may be that the solder points from NFC chip to the CPU part have fell off. Take apart the iPhone X by iPhone Screwdriver Repair Tools , take the upper board off the main board, when separate the main board we see a row of points have fell off. Picture 19-3-1 Look at the location map on WUXINJI dongle , it is surrounded by a ground wire, in fact, there are 6 useful points dropped. The ground wire does not need to be filled, the 6 useful points are added by professional phone welding tools. These are the signal wires of the NFC chip, so the iPhone X would report error 56. Picture 19-3-2 Then the tin of the middle column is repaired by iPhone X BGA reballing stencil , and the AP part is welded bac...
Read more

Setup and install the zxw tool Dongle Wizard

Image
So, you recently purchased ZXW Tools from our vipprog online store have no clue how to set it up?  Well, here is a quick guide detailing the installation process. Step 1 Unbox the ZXW tools dongle and plug it into your Windows PC.  ZXW tools does not support Mac at this time, so you’ll need a Windows compatible box. Step 2 Download the ZXW Tools software [direct link].  The ZXW tools website is in Chinese, but lucky for you, we’ve made it easy for you to download the latest version of their software directly from our website.  The zip file contains all of the files necessary to run ZXW Tools (trace) and Blackfish (schematics).  There is no installation process.  You just need to copy the files over to a directory on your desktop. Step 3 After you’ve copied all of the files over to a folder on  your desktop, then just run the ZXW tools executable.as shown in the picture. When your first run the software, the program will ask yo...
Read more

IPhone 6P Front Camera and Distance Sensor Fault

Image
Received a iPhone 6 Plus, the customer said that the front camera can not be used, and the distance sensor has problem too. The two failures are concentrated on the front camera flex cable, which is likely to be caused by the damage of the wiring. First, we have to eliminate the possibility of the external parts fault, then consider the motherboard problem. Remove the screen assembly and replace it with a good one, we still can't turn on the front camera and use the distance sensor. Disassemble to measure the ground resistance of the front camera seat of J1111 by Fluke digital multimeter , it is found that several pins are infinitely large, and the related inductors are loose when touch with the pen. It seems that the small components are pseudo welded. 19-1- 1 Remove the motherboard and observe it under the Trinocular Stereo Microscope , we can see that the touch was repaired before. 19-1-2 The back of the sub touch chip U2402 is the front camera seat J1111, an...
Read more