Hi @Plpete.

Welcome to the Sonos community and thanks for reaching out to us. I understand your situation about connecting the Sonos to the same system where what we only did was to change the password. Let me help you out with that.

 I would like to recommend by providing some situations and the corresponding steps on what to do accordingly.

• ​If you only have one Sonos device. (considering that the Sonso device is plugged into power and has a solid white light)

  1. Open the Sonos app.

  2. You will be prompted at the top of the Sonos app “can’t connect to Sonos, Fix it” prompt.

  3. Tap on that prompt and then select Update wireless settings.

  4. And then follow the prompts.

• If you have more than one Sonos device.

  1. Unplug all Sonos devices from power and while all the Sonos devices are unplugged from power, temporarily connect one Sonos device to the new router via ethernet cable. (ethernet cable first before connecting to power)

  2. Once the Sonos device (connected to the router via ethernet cable) has a solid white light, plug into power the rest of the Sonos device (not connected to the router).

  3. After all Sonos devices are connected to power and have a solid white light, open the Sonos app go to settings » system » network » wireless set up. And then follow the prompts.

  4. The prompt would also provide you the details on when to unplug the ethernet cable from the Sonos device connected to the router. (a wired connection is just temporary) or it can be permanent depending on your decision.

I hope this helps.

Please let us know if you still have further questions or concerns. We are always here to help.

Thanks,