"ERROR: Modem not detected" after python-update

I have three Pi Zeros with Novas, all of which have stopped showing up after running the hologram.io/python-update script. lsusb shows only the root hub. I’ve disabled the pi led and HDMI to try to maximize power, but I’m thinking this has to be something going on with USB. Any thoughts on how to debug?

Or should I just assume I had 3 Novas in 3 different boxes die in an hour coincidentally?

Hey, updating to a new version really shouldn’t make much of a difference there. If you completely power down and unplug the board and then power back on does it start working again?