DIRECT SUPPLIES INKS & TONER
There is a computer chip in each inkjet cartridge which informs the printer of the levels of toner within. Since manufacturers stand to win when cartridges are empty, there is the inclination to prematurely signal the depletion of a cartridge. There are a few especially annoying printers which will not print black and white when only a single color has been depleted. DON'T panic the empty cartridge will flash or show on the printer screen which one is empty and needing replaced.