What is the best way to repair iPhone 6 headphones without sound & display

Many people complain that they are hard to hear when they make a phone call, and even in some cases the screen doesn't respond. Now, We will tell you a practical way to help your cell phone back to normal.

Step 1: Connect it to DC power supply and boot, we found the current jumps normally, but the iPhone screen not display. After we connect it to computer, it prompts "please click on the device to trust". Picture 10-11-1

Step 2:  Now we can judge that the iPhone 6 can boot, just the iPhone screen no display. Disassemble the iPhone and measure the resistance of the display socket; the diode data of the screen reset and open signal are all abnormal. Observe it under the microscope, we found the trace of the hitting on screws which on both sides of the left and right. Remove the iPhone screws, scrape it, and then solder the jump wire on it with soldering station, now the iPhone can display normally. Because diode data of fingerprint socket which on the right screws are normal, so we didn't scrape it. Picture 10-11-2

Step 3:  After testing, it can record, playing a sound, the earpiece has no sound. Use multimeter to measure the diode data of iPhone front camera socket earpiece pin, the data is normal. The earpiece pin is through the inductor directly to the audio IC. Remove the iPhone audio IC, and then measure the diode data of I2S bus which is through to CPU, we found both the CODEC_TO_AP_XSP_I2S2_DIN and AP_TO_CODEC_ASP_I2SO_DOUT are infinitely large, it is open circuit. Picture 10-11-3

Step 4:  Find an iPhone motherboard to scrape it to check the line layout, scrape and ended up on the third floor of the right screw column. Picture 10-11-4

Step 5:  Mend the wire and put it back into the chip. Assemble iPhone and test it, earpiece back to normal, the repairs end!

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