Strange, when you connect the PLAY;3 with the Ethernet cable, it should take the data you’ve entered in the Sonos Controller about your network, and update what it had previously stored. Does your new WiFi signal match the Sonos Network Requirements FAQ?
If it does, I’d be tempted to submit a system diagnostic within 10 minutes of experiencing this problem, and call Sonos Support to discuss it. Don’t post the resulting diagnostic number here, they get sensitive about GDPR.
There may be information included in the diagnostic that will help Sonos pinpoint the issue and help you find a solution.
When you speak directly to the Support staff, they have tools at their disposal that will allow them to give you advice specific to your network and Sonos system.
For what it is worth, I’ve done the ‘original’ process I have described several times with the two PLAY:3s I have, and never run into an issue.
My Play 1 and boost able to play though probably. Let me try to contact Sonos support team. Thanks
If you use a Sonos Boost, a change of password has no effect on Sonos devices, I think.
