Something strange has now happened, the printer has been working fine with the updated time, however recently whenever the printer is powered down and back up the time resets to 01/01/1970?    I've went through the process of resetting the time / date and it works until the machine is power cycled: https://www.garron.me/en/linux/set-time-date-timezone-ntp-linux-shell-gnome-command-line.html   Is there a version of a "BIOS" battery in the UM3 that could be flat?