Cannot connect Sonos Play 1

I am trying to set up my PLAY:1 and can't complete the process. It can find my player and asks me to hold down the two buttons until I hear a chime, which I do, and then nothing happens. It doesn't move beyond that screen, and the flashing amber light eventually becomes a solid red. My computer app tells me it couldn't find it, even though it found it seconds before to identify which player I wanted to add.

This is a new PLAY:1 that I was sent about 6 months ago when my other one did the same thing. I did do a factory reset once because it was my only remaining recourse. Any ideas? MY PLAY:3 is connected and works fine.