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How to Repair iPhone 6 No Display after Booting

We will repair an iPhone 6 No Display Fault today; the main problem is that the iPhone 6 LCD screen has no display after booting. How to solve this problem in details? This article will give you the best professional solution.

Measure the diode data of display socket J2019 with Fluke 15B+ Digital Multimeter, there is no exception found in data. Measure the power supply output of iPhone display touch IC, there is no short circuit. When measuring the bootstrap voltage, we found there is no voltage.
We can check the iPhone circuit schematic diagram on WUXINJI Dongle


When we measure diode data, we found that C1554 had no short circuit, but also no resistance. In normal case, C1554-1 this one end can measure more than 600, the reverse resistance C1554-2 this one end can be measured to more than 600. We initially suspected that the display IC is virtual welding, after replanting the tin with QUICK861DW Hot Air Rework Station, it doesn't work. Now, our suspicions are disconnected. Remove the display touch IC, and then measure the display touch IC C4# pin and E4# pin to the C1554 these two lines, all is disconnected.



C1554 on the back, the distance of the welding jump wire） is far. In view of aesthetic, so we directly weld the jump wire near the display touch IC C4 # pin and the E4 pin.


After that, install the iPhone 6 and test it, the iPhone touch screen is displayed properly now!

More cell phone repair tutorials read on www.vipfixphone.com
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