with my hp 8500a plus i have a problem, she displays that the toner cartridge has expired. then she reboots again and again. i have another officejet pro k5400 and that does not have any problem with cartridges. so there must be a chip in the 940xl series cartridges i teturned the expired cartridges (dated 2017 december) to the dealer, i am waiting for their answer. i cannot change the language from dutch to english for this. even hard reset does not work with power off method.
so my question is: does it really have a date contol chip, and how to reset the printer to factory state?