I have around 10 of these laserjets around the office. For almost half of them they will show the toner level one day then the next day when i check the toner status it will say unknown. The printer still works fine and does not give any errors.
this is just a headache when im trying to keep track of toner usage and which printers need new toner.
i tried upgrading the firmware on one of the printers but it still has the same problem.
any ideas on how to fix this?