Chosen Solution

hello everyone. So it is like this: after screen replacement earpiece speaker stopt working, it whose working before 100%. I have changed everything! first new power and sensor cable and nothing, new speaker and nothing, than I tried this motherboard in other 100% working body and still nothing! I have tried new software (IOS 9.3.4) and sucking on earpiece :) also but still nothing. Also tried finding something else on forums and youtube but no luck. iPhone has no water damage or something like that. can someone please help my with this problem? thanks a lot

are the contacts from the motherboard to speaker clean? do you know if they are getting contact at all? did you install it in the right orientation?