This seems to be a long time issue with no solutions posted:
I've had my printer for 3 years, not one issue. I turned it on today and this error pops up for a second, then all the lights on the control panel light up with instructions to restart. I pressed the power button. it goes through a quick reboot but the same issue arrises. I unplugged, waited 5 minutes, plugged it back in, it started on it's own with same error. Now I can't turn it off, only unplug it.