mic problem after power button soldering

A ccliet came in to fix a power button and after I soldered in place the mic stopped working. I changed the mic and still not working. I covered everithing with some kapton tape and took all the precautions.

I made the work on top of a metal plate. I just think that the metal piece got too hot that might heated up other components and might loosen something.

Please Help!!!

TY