Solved: iPhone 6 Plus always restarting and got error 9

Today, we are going to talk about iPhone 6 Plus restart problem. After pressing the iPhone power button, the iPhone screen displays properly, but it won't turn on smoothly, becuse it always restarting, and it got a iTunes error 9. How to solve this problem?

Step 1:  Force restart iPhone 6 Plus
In order to force restart iPhone 6 Plus, please press the iPhone home button and the iPhone power button at the same time, after about 10 seconds, the Apple logo will appears on the iPhone display screen, and then you can release both button.

However, after the Apple logo appears, the iPhone 6 Plus was back to restart automatically.

Step 2: Update IOS

In order to update IOS, please connect the iPhone 6 Plus to the computer via iPhone lightning cable, open iTunes on the computer, and then use iTunes to update the IOS.

After updating, press the iPhone power button, the Apple logo appears normally, the problem still the same.

Step 3: Restore iPhone 6 Plus

In order to restart iPhone 6 Plus, please connect the iPhone 6 Plus to the computer via iPhone lightning cable, open iTunes on the computer, make sure the iTunes is latest version, and then use iTunes to restore iPhone.

However, it failed to restore and the iTunes reports unknown error 9.

According to our experience, the iPhone restarts automatically when white Apple logo appears, and there is a iTunes error 9, these problems are related with iPhone CPU, iPhone EEPROM IC and iPhone Nand flash.

Step 4: Solve it in hardware aspect

Use phone opening tools to disassemble the iPhone 6 Plus, remove the iPhone motherboard, there is no obvious faulty point.

Remove the iPhone CPU cover shield, apply some heat-resistance tape to the components next to the iPhone CPU, and then use QUICK 861DW hot air rework station and tweezers to check remove the iPhone CPU.

After removing the iPhone CPU, it's found that there is a circuit leading to the eeprom was disconnected, and the solder pad of the another circuit also is unstable, so we are going to solder a jumper wire to the corresponding pins of the eeprom IC.

Attach the iPhone motherboard to the PCB holder fixture, and then put it under the microscope. Use hot air gun to solder the jumper wire on the iPhone CPU solder pad. When it's done, soldering this jumper wire to the pins of the eeprom.

Now we need to weld the iPhone CPU back the motherboard, and then assemble the iPhone 6 Plus.

Finally, press the iPhone power button, the iPhone 6 Plus is turned on properly. Testing the functions, all functions works properly.

ZXW software won't open? – Download upgraded V3.0 ZXW software

ZXWTEAM upgraded the ZXW V3.0 software, and then some users complained that their ZXW online account can't be used, because the ZXW V3.0 software doesn't work, because you need the upgraded V3.0 ZXW software.  Generally, the V3.0 ZXW software can be updated automatically, but some regions failed to update automatically, here you can download the upgraded V3.0 ZXW software.

After opening the ZXW V3.0 software on the computer, it needs to be updated, you can follow the tips to update it. If it reports update error or update failed, you can use this link.

Upgraded V3.0 ZXW software download link:

https://mega.nz/#!JZ0zSYyD!GJ7qLWYoucfLppILEL3l4vhrMNphnAawKhik0IidDB0


Now, you can open the software, login your ZXW account, now you can use the ZXW online account smoothly.

Drop-damaged iPhone X speaker doesn't work- how to fix?

The iPhone X speaker doesn't work after dropping, how to fix it? After checking, we confirmed the iPhone X speaker is damaged by dropping, now we need to fix it.

Test the iPhone X, when we click a ringtone, there is no voice from the bottom speaker. We insert the earpiece, we can hear the voice in earpiece mode.

Based on our experience, the iPhone audio circuit is normal, but the bottom speaker is not working, we need to disassemble the iPhone X again.

Use phone opening tools to disassemble the iPhone X, carefully remove the iPhone X display screen, disconnect the iPhone battery, and then disconnect the iPhone X tail plug flex cable.

Use digital multimeter to measure the socket of the iPhone tail plug flex cable, the data tested is normal, which means the bottom speaker is working properly. Measure the iPhone motherboard connector, after measuring, we found there is circuit line of the one pin is open circuit.

Login to ZXW online account to check iPhone X schematic diagram, we know that this pin is connected to the second pin of the iPhone ringtone amplifier IC through by the middle layer pin S162 of the iPhone X motherboard. So, we need to check this circuit carefully.

Carefully take out the iPhone motherboard, apply it to the iPhone X fixture holder, and then use QUICK 861DW hot air rework station to remove the upper layer.

Observe the upper layer under the Stereo Zoom Microscope, we find that there are many pins are missing on the upper layer, which including S156 pin of the NFC circuit.

According to our repair experience, we think it's because the iPhone was dropped and then it caused virtual welding and pins missing on the iPhone motherboard.

Remove tins on the solder pad and upper layer, clean the iPhone motherboard. Use digital multimeter to measure the diode data of the S162 pin and S163 pin, the data tested are normal.

Now, we know that the open circuited is caused by the virtual welding of the middle layer.

Soldering a jumper wire on the S166 pin, apply some green UV oil to it, and then use UV light lamp to solidify it. Next reball the tin on the lower layer.


At last, assemble the iPhone X, and turn on the iPhone X to test it, the speaker function works properly. The problem has been fixed!

Troubleshoot: iPhone X failed to boot

Today, we are going to talk about iPhone X problem. This iPhone X is failed to boot,  we confirmed the iPhone display screen and iPhone battery are good, so now we need to check iPhone X motherboard. As we know, the iPhone X logic board is double layer designed, so we have to be patient and be carefully during the repair process.

Firstly, we need to tear down the iPhone X.  Use phone opening tools to disassemble the iPhone X, and then remove the iPhone dispaly screen, disconnect the battery, and then remove the iPhone X motherboard.

Now, we need to separate the folded motherboard, we can put iPhone X motherboard on the SS-T12A heating station, so we can separate the motherboard.

After separating the motherboard, we  need to measure the iPhone X upper layer logic board with DC power supply, the current is abnormal, now we confirm that the faulty is on the iPhone X upper layer.

Use digital multimeter to measure the iPhone power supply voltage of the upper layer, we found that there is no voltage value on C2771 and C2770.

Continue to measure the C2771 , it is normal. Then measure the C2770, the problem was found, the inductor L2770 is damaged.

We need to replace the damaged L2770. Attach the upper layer to the iPhone X PCB Holder, in order to protect the surrounding components for L2770, we need to stick High-Temperature Adhesive Tape in there. Use QUICK 861DW hot air rework station to remove it.

After removement, re-weld the new inductor L2770 to the motherboard, and then measure it again, now the data is normal.

Finally, install the iPhone X, and test it, the iPhone X is turned on successfully after pressing the power button, the trouble has been solved!

Here to get iPhone 7 A10 CPU replacement manual

 Today we are going to replace the A10 CPU, the iPhone 7 A10 CPU is damaged, and it causes iPhone 7 deosn't works properly, we are going to replaceit directly, here is the replacement manual.

Use screwdriver to remove the screws next to the iPhone lightning port, put iPhone 7 on the CPB screen separator for a while, so we can open the iPhone display assembly easily.

After remove the iPhone display assembly, carefully take out the iPhone motherboard.

Put iPhone motherboard under the Trinocular Integrated Microscope, and then apply high temperature resistant tape to the components next to the iPhone CPU.

Use QUICK 861DW hot air rework station to heat the edges of the iPhone CPU, and use graver to remove the glue from the CPU edge.

During this process, please be careful and be patient, because the circuit line on the bottom is easy to damage when you remove the surrounding glue by using blade from bottom to top. The other hand, please don't put the hot air gun at the same place for a long time, we need to move it evenly and constantly, and avoid to heat the iPhone baseband directly. With this way, we can avoid damaging parts because of overheating.

Use thin blade pry in the iPhone CPU, then gently move the blade from right to left, and when moving to the top end, stab the knife in a little bit, then move the direction from left to right to pry the CPU.

After removing the iPhone CPU, we need to clean up the solder pad. Apply the solder paste on the solder pad, heat it by QUICK 861DW hot air rework station, and then clean it with cotton. 

Next is to remove the residual glue using a scraper, and then clean up the remaining glue on the side of the pads and pads

We need to clean up the iPhone CPU. Apply solder paste on the iPhone CPU, and use hot air gun to clean it. Use blade to remove the glue from the CPU and the glue on the side of the CPU, and then clean it again.

Now we need to re-solder the iPhone CPU. Align the QianLi Black BGA Reballing Stencil to the A10 CPU, apply solder paste on it, and then use hot air rework station to heat it for a while to make it dry.

Take out the iPhone CPU, and then clean it up. Apply some solder paste on the iPhone CPU, and then install it back to the iPhone motherboard, and then assemble the iPhone 7.




Press the iPhone power button, the iPhone 7 is turned on properly. After entering the IOS, test the functions on iPhone, the touch functions, the WIFI function, the BT functions and all other function are working properly!

Troubleshooting tips for iPhone 6 Plus WIFI button failure

 In this page, we will talk about the iPhone WIFI button problem. Here is an iPhone 6 Plus with WIFI button failure.  The iPhone 6 Plus WIFI button can't be turned on after dropping, here are some troubleshooting tips for it.

Firstly, rest all functions on iPhone, the 3D touch, camera and Bluetooth functions all are normal, except the iPhone WIFI function, the iPhone WIFI switch can't be turned on, and it’s grayed out. Firstly we try to fix by some simple software solutions, but not working, until we dissemble the iPhone and fix it in hardware aspect. The repair process is as follows.


Tips 1: Restart iPhone 6 Plus.

As we know the iPhone WIFI problem could be caused by the iPhone has software problems or crashed App, restart iPhone can fix many simple software problems.

In order to restart the iPhone 6 Plus, please press and hold the iPhone power button until the slider appears, drag the slider to turn your iPhone 6 Plus completely off, after the iPhone 6 Plus turns off, press and hold the iPhone power button again until you see the Apple logo.

Now test the iPhone WIFI switch, but it's still won't turn on.

Tips 2: Reset network settings

The iPhone network setting problem also can cause iPhone WIFI failure, so we need to reset the network settings.

In order to reset network settings, tap settings-> General-> Reset, and then tap reset network setting.

After resetting, back to WIFI to check, the iPhone WIFI switch still is grayed and won't turn on.

Tips 3: Update IOS

Is it the IOS problem? So we try to fix it by updating IOS. Go to Settings-> General, and tap Software Update on iPhone 6 Plus, the IOS update is available. Because the iPhone 6 Plus can't connect to WIFI, so we going to update it via iTunes.

Connect iPhone 6 Plus to the computer via iPhone lighting cable, and then use iTunes to update the IOS. Unfortunately, the iPhone WIFI switch is still not turn on.

Now we need to disassemble the iPhone 6 Plus to check inside of it.

Tips 4: Disassemble the iPhone 6 Plus

Use screwdriver to remove the screws next to the iPhone lightning port, and then put iPhone on the CPB screen separator, after a while, we can disassemble the iPhone smoothly.

Tips 5: Repair  iPhone 6 Plus

Remove the iPhone motherboard, and then use QUICK 861DW hot air rework station to remove the iPhone WIFI IC, we found that there are many pins of the iPhone WIFI solder pad are dropped, this is the real problem, we need to re-fill the pins.

Clear up the solder pad, re-fill the dropped pins, and then apply the green UV oil to fix them. Install the iPhone WIFI IC back to motherboard, and then install the iPhone 6 Plus.

Finally, power on iPhone and test it, now the iPhone WIFI switch can be turned on smoothly, and the iPhone WIFI function is working properly. Continue to test the other functions, all works well. The repairs end!

Troubleshoot: iPhone 7 has black screen issue after dropping

The iPhone 7 screen doesn't display, it has black screen issues, how to troubleshoot it? The screen issue is one the most common problems for the iPhone,  there are many solutions for fixing this black screen issue.  Let's troubleshoot this iPhone 7 black screen issue.

The iPhone accidentally drop into the ground, after pick it up, the iPhone screen is good, but it doesn't display after booting.

Let's try some software solutions first, if the software solution doesn't work, then we should try hardware solution.  After trying the software solutions ( Force restart/ Update IOS/ DFU restore),  the iPhone screen still is black, now we need check iPhone motherboard.

Disassemble the iPhone 7 , remove the iPhone display screen, and then take out the iPhone motherboard, connect it with the DC power supply to test the iPhone boot current, the boot current jumps to around 350mA, and then turns downs and restart.

Because the iPhone 7 screen is damaged by dropping, so we suspected it's caused by virtual-welded iPhone Nand flash or damaged system.

Connect iPhone to the computer, and then brush it with iTunes, the iTunes reports unknown error 4013. The error 4013 is related to iPhone Nand flash problem.

Use QUICK 861DW hot air rework station to remove the iPhone Nand flash, and then measure the diode data of the iPhone data cable that communicates between the iPhone Nand flash and the CPU, the data tested is normal.

Install the iPhone Nand flash to the JC P7 Nand programmer; the data of iPhone Nand flash can be read normally, which means the iPhone nand flash has no problem.

As we know, the iPhone baseband CPU problem also will cause this problem. Put iPhone motherboard under the microscope to observe, no components are missing. Directly remove the iPhone baseband CPU, clean up the solder pad, and then re-weld the iPhone baseband CPU to the iPhone motherboard.

Assemble the iPhone 7, press the power button, after few seconds, the Apple logo appears normally, and then the iPhone enters IOS system.

Testing the functions on iPhone, the touch function, WIFI function, camera function and other functions all is working. The repairs end!