i got my iphone 5s replaced for its housing due to severe dent.the technician removed & replaced all parts to the new housing.everything went fine except for the power button so i got it replaced as well.

but suddenly when i test the touch id, the system said has error.the speaker that works previously even after transferring to the new housing also suddenly doesnt work.but audio jack, charging port & mic works fine.

thinking that it was due to software issue,the technician restore the phone.after restoring, the speaker still doesnt work, & there is no option for touch id input during setup & even in the setting.

software issue? or hardware issue? bottom part cable ribbon for speaker, mic, touch id & charge port spoilt?