I was out of town for a few days and when I came home all three of my 3rd gen Echo devices have a spinning cyan ring. No other colors and all are working fine. I have tried unplugging and repowering, asking if they need an update, etc. I can't figure out what the light ring means. It doesn't match any of the colors in the chart explaining the colors.
The spinning clockwise white light on the Echo Dot is indicating that Alexa is Guarding your home. It indicates that Alexa is “listening” for smoke/CO2 detectors and glass breaking. On the Echo Show, it displays a small Alexa Guard “shield” icon. Not sure why it’s not listed on Amazon support, or why their help staff does not know this- but my guess is because it is a new feature that has not rolled out to everyone yet.'
To quote Kristen C Amazon Staff "
I'll pass it on to our team so they can look into getting this information more visible."