Opening the Chamberlain Smart Garage Hub
Disassembly is simple, just remove the 2 Phillip screws on the back of the device as seen in the photo.
Remove the PCB
First dislodge the yellow antennas on the perimeter of the housing. Then there are 3 tabs holding the PCB in place, bend them back and pull the PCB out. I found the easiest approach was to pull the button/DC jack side out first.
Remove the Buzzer
Flip the board over and find the 2 pins holding the buzzer (BUZ1) in. De-solder the buzzer and pull it off the board.
Reassembe and enjoy some peace and quiet!
Don't forget to put the antennas back in place.