The printer's firmware reconizes electronic signatures of cartridges, nothing you can do (short of flashing you printers bios, which will render it a door stop) is going to get that cartridge to recognize as full. [Embarassed] :P [Twisted Evil] Printer Cartridges Hp (http://www.ink-refills-ink.com/printers-cartridges/HP-Ink-Cartridges/), Lexmark Printer Ink Cartridges (http://www.ink-refills-ink.com/printers-cartridges/Lexmark-Ink-Cartridges/)