Answer to: Microphone not working ONLY on video recording DX HELP!This is such a common problem, but there are two opposite symptom sets. One is that the mic does not work with the phone, Skype, and memo, and the other is that it does not work with video or speakerphone. I experienced the second after replacing a bad power switch assembly. I went back in to replace a bad home switch and I tried the common youtoob fixes which are clean the small mic hole next to the headphone jack and the extra cardboard to put pressure on the motherboard audio chip, neither of which worked for me. A search yields info that this is a known problem with the audio chip on the motherboard, which ifixit notes in other answers. The chip loses some PCB connections, and the probability goes towards losing phone mic. We went in and fixed our phone problems, just like apple repair would, and disturbed the mo-board enough to disturb the chip. But we don't have replacement motherboards to pop in like they do if the mic does not work, or probably with every fix because of the high probability of the chi...