I know the X can be picky when it comes to charge ports. If you use aftermarket it will cause it to bootloop they only like genuine ports. I know you said his original one failed, but do you know why? Was the charger not seating properly when plugged in? If you still have the original one, I would try cleaning it out with fine tipped tweezers or a toothpick. I would also test it with the original port to see if the mic is having issues there as well.