None of the microphones working after repair

A friend smashed his phone up pretty bad. Bent, broken front and back. Ordered OEM complete housing with components, and a screen. Pretty simple repair usually. Everything went well except bot neither microphone work at all (normal phone call or on speakerphone) no one can hear me on the other end. The test of the components seem to work find on each flex that shares the mic which is odd (camera, charger port, etc) which I would think eliminates the whole cable being bad. Help?