Found this thread: Firmware update problem - #3 by Tarkus_9
It had a ring of plausibility for me anyway. The bad news…it didn’t work. I was hopeful when I plugged on my old 1600mW laser and it told me the firmware was out of date. And it did so again when I put my CNC head on (I haven’t used that one yet). Sadly, I went through them all and, as a bonus measure, did it with the new tool head on……and then with no bed, no head, and no enclosure. There’s no change. Each time it says that the newest firmware was already there. And at no point did it successfully reboot.
However, I feel like we’re on the right track. I could very well be wrong. But what I think ISN’T happening is the touchscreen. I think the tool heads are getting update and the controllers are getting updated, but the screen is not. I have a vague recollection of it going through three times to 100% and none of my attempts did three times around. I’m wondering if that third one would happen after the reboot that isn’t happening for us.