Canon faces a class action lawsuit with the accusation that its 4-in-1 printers don’t print documents if an ink cartridge is low.

Further, “There is no reason or technical basis for manufacturing the All-in-One Printers with an ink level detection function that causes the scanner to stop functioning when ink is low or empty. Canon designed the All-in-One Printers in such a way to require consumers to maintain ink in their devices regardless of whether they intend to print.”