How to Fix iPhone 6 No Sound and Boot Problems Lots of people have enjoyed their iPhone 6 / 6 Plus, but, sadly, many problems have arisen over the years. If you've run into any iPhone 6 problems, there are kinds of methods to fix iPhone 6 no sound problem. In this piece, Vip Fix Shop Team will attempt to discuss the various reasons why this could be occurring to your iPhone 6, and some potential workarounds to get you back into the device.
Received an iPhone 6 from customer, the fault described is just beginning the earpiece no sound, then not boot and iPhone screen shows black.
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 1-1
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 1-2
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
CODEC_TO_AP_XSP_I2S2_DIN
both
the and
AP_TO_CODEC_ASP_I2SO_DOUT are infinitely large, it is open circuit. Picture 1-3
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 1-4
Mend the wire and put it back into the chip. Assemble iPhone and test it, earpiece back to normal, the repairs end!