More and more people reported that their iPhone stuck in a restart loop. This video show you show how to fix iphone keeps restarting. The iphone continuously restarts and became totally unusable, the Apple logo appear and disappear, over and over again.
Does your phone ever meet this common problem which drives you crazy? Watch our video to get it fixed now!
1. Take down the LCD screen assembly
2. Test voltage of the battery with digital multimeter. Battery voltage is 4.21V, battery test signal voltage is 2.02V. The battery is normal, so we install the LCD screen assembly to check other malfunctions.
3. Failure detection: connect the phone to computer, it could not be restored by iTunes, an unknown error occurred (9), so that we can draw a conclusion that NAND flash or CPU is cracked.
4. Detach the motherboard from the phone, and fix it on PCB holder.
5. Remove the NAND flash chip from motherboard carefully.
6. Clean the bonding pad with solder iron, knife, BGA paste flux, rosin, solder wick and PCB cleaner.
7. Connect the NAND flash programmer with computer, transfer the data from the old NAND flash to a new one.
8. New NAND flash chip BGA reballing.
9. Install the new NAND flash chip to the motherboard.
10. Install the motherboard to the phone.
11. Connect the phone to computer, it can be restored by iTunes successfully.
12. Test if it works well.
1.Prepare a new 64GB NAND flash memory chip.
2.Error 21, 9, 2009, 4005, 14, 40 indicate NAND flash or CPU malfunction.
3.You may need to repair the CPU if the phone still keeps restarting after the NAND flash chip is replaced.
64 Bit Nand Flash Memory Chip Programmer: https://goo.gl/H23N4U
Mobile Phone Repair Platform: https://goo.gl/C9JNsq
Digital Multimeter： https://goo.gl/11qAki
Electric Soldering Iron：https://goo.gl/xZPAeL
Hot Air Gun：https://goo.gl/I1dvws
Tag:iphone keeps restarting
How To Fix iPhone 6 camera not working?10239 views
How to Restore Touch ID of iPhone Due to Home Button Flex Broken15543 views
iPhone X OLED Screen Total Teardown Analysis55768 views
iPhone 8 Broken LCD Screen Refurbishing Glass Only Repair17034 views
iPhone 7 Plus Upgrade Storage To 256 GB On iOS 118920 views
iPhone Aftermarket Glass Lens Factory Production6695 views
iPhone Black Screen Repair9446 views
iPhone 7 Frozen Screen - Full Diagnosis And Fix15962 views