Microphone busted after buzz-fix

[Tomas Riveros Schober]

Hello List,

I have 2 freerunners and both were A5's. I have a friend that is 
experienced soldering and doing reworks and he performed the buzz-fix on 
both freerunners. However, one of those seems to have the microphone not 
  working anymore. The other Neo was fixed correctly (despite having 
different resistors or whatever, the interference was reduced a lot).

Any suggestions on how to diagnose it correctly?
I already loaded the A7 state file (which works wonders on the other 
neo), tried different distros.

Is there any kind of "warranty" (i know there's not an official one) 
from openmoko in case i need to ship it back to taiwan or something?

Since I'm in Chile and no local distributor is available, I had to 
perform the fix "unoficially".

Thanks for the time

Tom