Home button stopped working after screen replacement

Haven't seen this one in the forums yet so hopefully, someone here will have some answer to my problem. Recently replaced the screen on my friend's iPhone 7. Bought the non-full assembly and had to transfer the button and camera over. Everything worked fine for two days and then the home button stopped working and the phone acts like the internal speaker isnt connected when no headphones or bluetooth are connected. Upon pushing play in apple music or spotify, phone will say "not available" and not play. TouchID still works. and font camera and earpiece still work. Im stumped.

Any help is appriciated!