HP Laser printers have a “Cartridge Policy” and “Cartridge
Protection” built into their software that blocks aftermarket toner cartridges.
Please turn off both functions on your printer before installing a new
replacement toner cartridge.
Often, HP will release a new firmware update to block out
the aftermarket chip solution, it is highly recommended to disable the printer’s
automatic firmware update feature on your printer.
Click here for instructions to disable these functions.