Never seen something like this before. My 2016 Black Friday edition N3DS began experiencing diagonal circle pad drift, so naturally I replaced the circle pad. After doing this, it seems like only the C-Stick and ZL/ZR buttons are recognized by the OS. No sound, 3D does nothing. However, this...
I remember seeing a tiny circular speaker looking thing underneath the serial number sticker on the original 3DS. There may have been two. Was this a speaker? If not, what was it?