I just did this last night, it was a pretty difficult repair. One of the hardest parts was getting the little rubber casing off of the old microphone and onto the new one, as noted in Step 34. Fortunately everything worked perfectly when reassembled, except that I STILL have problems with it not charging! The issue is the same no matter what cable or power source I use, even with a brand new lightning connector. What other reasons would this be happening?