原帖由： MrJimPhelps ,
Power the machine off by pressing the power button. Then unplug the power cord, as well as the USB cable. Leave all cables unplugged for 10 minutes or more, to give time for all power to dissipate from the printer. https://www.manualslib.com/manual/922555/Canon-Mx470.html?page=67&term=reset&selected=1 Hopefully resetting the printer in this way will clear up the problem.