HP are very hot on updating the firmware to stop the use of aftermarket toner cartridges. They often do this in the background, without the user even realising that it has been done!
As such, we offer downgrades to older versions of firmware below. If you are unsure of how to use these, please give your personal account manager a call!
HP CF259 Printers – Click HERE for Instructions
HP CF540 Printers – Click HERE for Instructions
HP W2030 Printers – Click HERE for Instructions