I’m not exactly sure what you have done. I suggest that you refrain from any additional Factory Reset without further consult.
Is this an S1 or S2 system? Your old PLAY:5 is S1 only. The S1 controller icon is gray in color.
@Chanito,
It appears from your opening post that you ‘may’ have possibly ‘split’ your Sonos system into two separate Sonos Systems/Households when you reset you 4 wireless speakers and set those up again using the Sonos App which, if true, may have caused the App to lose sight of your original wired system with the Amp etc.
I agree with @buzz that you should not reset anything further, until you have sought further advice and it’s established what steps you may have taken so far, as you might end up losing the original Sonos system. In reality when changing to the mesh WiFi network there is usually never the need to factory reset any Sonos device.
It maybe best to next speak over the phone to Sonos Customer Support and explain in detail the steps taken so far and they maybe able to then help you restore your original setup and get all your devices back up and running on your new mesh network as one complete system.
Here is a link to contact the Sonos CS Staff, if you perhaps want to first explore that option (recommended):
https://support.sonos.com/s/contact
Many thanks to those who have read and responded. I will reach out to the SONOS support team before I do anything else. Pura vida!
Good luck with that, I have tried for 3 years now to solve my network issues with Sonos. Still no solution.
Initially I had some issues with my SONOS system that were caused by incorrect network layout. I straightened that out and things have been fine since. That was in 2005.