I had the same problem, i.e front panel power button stopped working and input selector cycled quickly when touched. Power cycling did not help, but factory reset did.
ABC does not work on my iPhone 4S. During the subwoofer sweep tone, the app drops the BT connection and the phone jumps back to the home screen. The sweep, however, does continue, but no data is collected and the ABC enable button remains grayed out. I tried the app on my wife’s Android phone and ABC worked fine.
I tried to send you a note at the address you gave above and it bounced back saying the address (firstname.lastname@example.org) did not exist. Is there another address to which I can post the email?
Yes. I am using several of the inputs, but I only have a massive “thump” when selecting Analog 1. This occurs even when the amplifier is muted. BTW, I’m not using a sub and the thump seems isolated to the right side speaker.