The short story is that I have the Arc and Sub 2.0. Everything connects, but I can only get sound out of the arc.
I've tried resetting the router, the sub, the arc.
Tried putting older software into the sub, and then updating again.
I've reset both sono speakers a half a dozen times
I've tried having the subwired to the router, and i've tried having the arc wire to the router, setting it up after both of them are reset.
I cannot get a test sound out of the sub before I link it to the arc system.
I'm using an Eero router, without issues to any other non-sonos devices.
It connects and the functionality all looks correct, i can add it to the room. All the lights work properly. I've tried disabling the wifi on both units when they were hardwired, i've tried having it all set up wirelessly and disabling the sub and reenabling it. I've tried setting the sub and arc up from scratch in 2.4g & again in 5g router configurations.
I tried to contact Sonos support and failed. But have put in ticket # [redacted]
I'm at loss.
Moderator edit: Recorded and removed diagnostic number
