Originally Posted by Herk7769
Most likely the transformer fell out of the wall socket. Each chair has its own transformer and an entire outlet is taken up by those wall warts.
I unplugged them from the wall and installed them in a power strip; then plugged that into the wall in our 2019 Flagstaff 8529FLSC
You were exactly right. One of the two transformers had fallen out of the wall socket. I was able to pull the seat out from the wall enough to get behind and plug in a power strip and plug the two transformers into it.
As the space was tight and I am approaching symmetry, I thought I was stuck back there. I managed to get out but it would have been much easier if I had emulated a body builder and oiled up.