•  This printer is  intended to work only with  cartridges that have new  or reused HP electronic circuitry, and  it uses dynamic  security measures to block cartridges using modified or non-HP circuitry. Periodic firmware updates will maintain the   effectiveness of these measures and block cartridges that previously  worked.  Reused HP  electronic circuitry enables the use of reused, remanufactured, and refilled cartridges.