Printer Schemes

[MetalHead]

Yeah... HP LaserJet user here... Same thing with their color laser printers. Funny enough, their design is setup in such a way that once the cartridge sends an empty signal, even refilling it (drill a small hole in the plastic cartridge and refill with toner) still signal as empty. That's designed to screw you.

And the initial cartridges are the same size and indicate the same model number as their replacements but are only half-filled (as indicated in their user manual). That's also designed to screw you.