Chosen Solution
Hi, I have a Nokia Lumia 930 (same as the Icon), and 2 of my 4mics are dead. Can’t use speakerphone, and can’t record voice, recorded videos have mono sound, on skype video calls people can’t hear me (same as speakerphone). The diagnostics showed the 3rd and 4th mic are faulty. They were working fine when I bought it. One day they just stopped working. Still has warranty, though, but Nokia Care told me it could take several days to replace. Can you help me to replace it myself? Thank you.
I’m not sure in what order they’re counted, but if speakerphone doesn’t work, then it’s top-back mic, so if you have at least one channel working in videos and can use phone as regular, then both bottom mic’s are fine, so I’m guessing both top mics are faulty. Too bad, they’re soldered on the motherboard, while bottom mics are easy to replace. Replacing soldered mics would require qualified specialists to do it with the right tools. Especially considering that they’re soldered on both sides of the mainboard against each other, so it’s quite tricky.
The standard answer you will find is that you will have to replace the motherboard. Let the Nokia people do it, they know what they are doing :)