How to fix iPhone 6 no display failure

What should we do if our iPhone 6 no display ? How to repair it ? The iPhone 6 doesn't display after boot, first connect it to DPS DC power supply to check the current, the iPhone boot current tested is normal, the iPhone 6 turned on but the screen no display. 






Disassemble the iPhone logic board and observe it under the Stereo Zoom Microscope, We found that the iPhone Nand flash had been fixed before, and the other parts did not. However, since the iPhone Nand flash is not related to display, we can ignore this problem.

Using a digital multimeter to measure the resistance of the display socket, we found that all resistance values are normal. Since the resistance is normal, then we need to measure the display power.  Install the iPhone display screen and test it, the display +5.7V and -5.7V all are normal, but when measuring the 1.8V voltage of the display reset, no voltage was found.



After checking the iPhone schematic on WUXINJI Dongle, we know that the display reset signal is directly provided by the CPU, and usually does not cause voltage by the internal problem of the CPU.

In this situation, we need to disconnect the signal between the CPU and the display reset, and then use QUICK 861DW hot air rework station to solder a jump wire from the main reset of the CPU to the reset signal of the display.



After finish the soldering, install the iPhone display screen and test it, the iPhone screen displays normally, enter the iOS system, all functions tested are normal, the repairs end!

If you need any of the above products, please visit www.vipfixphone.com.

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