Water-damaged iPhone 6 screen no display failure—How to fix?

A water damaged iPhone 6 touch screen no display after booting, when insert the SIM card, the iPhone 6 can receive the callings from other cell phone, but there is no ringtone on iPhone 6.

According to our experience, because the iPhone 6 has fell into water before, so there must be a corrosive place that causes display function to be abnormal. We can start the repairs from the water inlet area，so we can easy to fix it.

Disassemble the iPhone 6, take off the iPhone motherboard, and put it under the 14MP HDMI Camera Stereo Zoom Microscope to check the place where the water is flooded, we found the 2 4 pin of the J2019 display socket have been corroded.

Check iPhone schematic diagram on WUXINJI Dongle, the 2 pin is PP_LCM_BL_ANODE_CONN backlight power supply, 4 pin is PP_LCM_BL_CAT1_CONN backlight circuit.

Clean up these 2 pins, and then use QUICK 861DW hot air rework station to solder it well, now the iPhone has display after boot, but no touch.

Continue to repairing, after observation, we found that iPhone touch IC U2401 and U0900 audio IC all have water corrosion marks. Disassemble it to check, the solder pad have been corroded. Clean up the corrosive solder pad, and then replace the chips.

Assemble the iPhone to test, the touch function back to normal, there is the ringtone when receiving calls. The repairs end!