So earlier this week I replaced a bunch of old caps in my Marantz 2015 receiver to fix a buzzing in the right channel. The issue is gone and the unit sounds great. However I've had a Bluetooth connected to the Tape 2 input and never had any issues but now whenever it's connected, it plays through regardless of which input the selector is set to (except tape monitor 1 which of course, has it's own button) whenever it's connected all the other inputs are very tinny and muted. I'm assuming the issue lies in the input selector knob since the tape monitor 1 button is excluded. Should I start there? What should I be looking for? I didn't go near this area during my initial repairs.