how to fix connect:amp connection problem

If you’ve already checked the power (from the wall and properly seated in the CONNECT:AMP), I would recommend that you 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, Sonos’ lawyers get sensitive about GDPR, I suspect.

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.

thank you. tried that, they thought internet system, which was a dead end. thought I'd put it out to the experienced folks in case it was something simpler.

What is the LED showing?

Have you tried a temporary Ethernet connection?

Is this a device that used to work and now doesn’t, or a new installation? If new, are you sure you set them up in the same system (using add to existing system during the installation process) rather than creating two systems with a device in each?

Thank you for responding. These 2 amps have been working for 10 years, and suddenly one wouldn’t connect. The white light on the not-connected is bright, the one connected was dimmer. On a whim I changed the Sonos channel from 1 to 6 and quite suddenly the light went dim and the amp connected and is working. Wish I knew why . . . . . 

At some point I suggest that you reboot this unit. I suspect that this unit is brewing up a hardware issue. I’m not suggesting that you Factory Reset this unit at this time, but if you watch units carefully during a Factory Reset, you’ll notice that the status light is initially bright, then dims near the end of the process. For some reason the unit ran off track, brightened the light, then stalled. The big mystery for me is why changing the WiFi channel broke out of the stall.