Inherited sonos speakers, can i use them?

It is:
 

Have you tried WD-40?

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You are correct! I have now reset the speaker in the upstairs bathroom. It is still sjowing in the Sonos app, it just says 'not connected' ??? . Now i have to figure out how to cut the power to the downstairs bathroom speaker so i can reset it. We don't know where it is plugged into, i cannot remove the connector from the speaker end - not even with pliers, so it leaves one option, to trip the power to the whole house, and my wife is telling me to forget about that idea!

However though, something tells me even once i reset the downstairs bathroom speaker, the Sonos app is still going to ask me to sign in as the system owner!!!

I might end up going to an audio store and paying for a call out. Sounds pathetic, but this is really doing my head in.

Reset the speakers and the app. To reset the app, you can uninstall and install it again or clear the app data/storage.

Then, when you start the app, it'll show the “Get started with setup” screen. Choose “Speaker or component” instead of “Join existing system” and follow the prompts.

You only need to trip the circuit breaker for the speaker. If this was my house I’d want to know which breakers serve each outlet. Now might be the time to log this info if it is not yet known.

Once you’ve reset all of the speakers and the controller, you won’t be bothered about the previous owner.

On turning the screw. Some folks (including me) like to use thread locking compound on screws like that. If they picked up the wrong compound, brittle, not sticky you could need an impact driver to hit it with enough force to get it free, might destroy the socket too, depending on the strength of the locking compound. Extra bad choices could also require heating the screw which would ruin the socket.

I like LockTite Blue for things like this, strong enough to keep the screws tight but only a bit more force needed to remove them.

Worst case try combining locking pliers on the head and your driver inside, then apply pressure to both, then tap the locking pliers with a brass mallet to see if you can fracture the bond.

ALI_101,

Likely you can press the Join button using the eraser end of a pencil — without dismounting the speaker. But, you’ll need to use my circuit breaker trick or trace the power cord to its outlet.

Thanks everyone for your support. 

As i first port of call i will try to cut the power to the downstairs speaker via the curcuit breaker. There must be 30 switches on our curcuit board, once i can figure out which is for this speaker i'll get onto it.

You’ll need an assistant to throw the breaker because there will be a timeout if you attempt to run back to the speaker and press the button.