Yesterday, I couldn't print on #4 due to filament clog or jam in the nozzle. I removed the feed gearbox mechanism and cleared the filament and reassembled it. When I restarted the printer to heat up the nozzle, an error message came up on the screen, saying that Klipper needed to restart and the firmware needed to be updated. I shut it down twice leaving it off for about 15 minutes each time, but the error message remained.
I'm hoping someone may be able to shed some light on this as I have no idea on how to proceed from here.
Nicholas suggested that it might be the USB cable to the print head?
Tim