adafruit wrote:odd, but sometimes a chip isnt seated well or something (?) glad to hear its working now :)
True, but I had checked, pulled, and reseated both chips and still no joy. It only worked after I cleaned off the board (after finishing the build).
Have you ever built using organic "water soluble" flux before? Like I said, I have never had a problem before, but since I am not the first person to say "It didn't work until I finished the build" then that 'MAY
' be something to look at. I unfortunately have no idea what the other user was building with.
I wish I had thought to try cleaning off the flux and testing again. That would have been telling.