I am a long time Sonos user. I have numerous Sonos products in two homes. It has worked beautifully until this week (4/27/20). On 4/27-4/28/20, my IOS app could not find the Sonos network and kept showing the message System Not Found. I tried rebooting devices, downloading updated app, even called Verizon to inquire if they had updated any router settings recently. No luck. I called SonosTech Support and the tech was very helpful. We eventually got the app running by connecting a Play1 directly to my router with a data cable. Rooms began appearing and then I lost the phone connection!! However, the Sonos network again became unstable and many devices simply would not appear in Rooms and some that did would not play. Later, after reading about the Legacy S1 products and the impending upgrade, I decided to unplug all of my S1 products which were five Connect-Amps. Miraculously, the Sonos network came right back and Rooms once again appeared. It has been stable for 24 hours and working fine… What is going on with the S1 Connect-amps ??? Any advice how to get them back online without causing the network and app to crash?
DaveQ