This is the thermal printer not showing up under /dev/ on the Omega. I've just tried a factory reset which hasn't helped. I haven't got any other devices to try. Thanks for the suggestions.

The USB stopped working. It may have been the osupgrade. What can i do to debug this? USB no longer appears under /dev/

Ive noticed the onion makes very high pitched sounds. I assumed this was one of the components and was normal. Having seen your post im now worried.