How to Repair iPhone 6 Plus Backlight Failure

We are going to repair a iPhone 6 Plus today, the main failure is that the display or backlight doesn’t work, it doesn’t show any image now. The iPhone motherboard had been repaired by another technician once. How shall we handle the common failure? Let’s check in this article.

There is obvious damage from the appearance, use toolkit to disassemble the iPhone, take out the iPhone motherboard. Put iPhone motherboard under the Trinocular Stereo Microscope to observe, we found the iPhone display touch IC of the iPhone motherboard, iPhone light control IC U1501 and NUT column all have been removed. Moreover, the bottom of the NUT column on the iPhone motherboard has been hit by a long screw.

Use QUICK 861DW hot air rework station and BGA remove graver to scrape it, there is no disconnection phenomenon.

Measuring the resistance value for the D3# layer of the iPhone display touch power supply IC U1501 by digital multimeter, there is no resistance, which is abnormal.

After checking the schematic diagram on WUXINJI Dongle, we use QUICK 861DW hot air rework station to weld jump wire from resistor R0302 to U1501D3#, and then install a good U1501.

After installation, test the iPhone 6P again, the data is normal now. Install the iPhone, and open it for testing, the iPhone shows normal, other functional tests are normal, the fault has been fixed!

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