I replaced a screen on an iPhone 6plus and the front facing camera sound died. So I replaced the flex cable for the front camera. The first one I used caused the red screen rebooting. I replaced it with another flex cable for the front camera assembly and it’s working just fine!
I am having this problem now, jliscum31, did you find an answer or solution? I have replaced the charge port twice. I made sure to not cover the microphone hole with adhesive. I tried to ensure the microphone was lined up in placement. The callers complain he sounds muffled and his voice cuts in and out. Any thoughts!? Thank you!
For others who run into this problem. I replaced the screen and it seemed to go well, however the home button was non functioning afterwards. I found this thread and kept looking at the original home button flex which seemed normal, I could see a little black dot. So just in case I ordered a new home button flex cable. Then after I had them side by side I could see that what I had originally seen was the remnants of the black dot, and it was wearing off! I found a YouTube video about how to replace the black dot. Whew!!! I hope this helps someone else who needs to see exactly what it is!