We are using a LaerjetPro 300 M351a and have just changed the toners and replaced them with HP toners. The printer prints all documents correctly.
However the menu screen on the printer is only showing the Cyan toner as full. The Magenta and Yellow toners are showing as nearly empty and the Black toner has a question mark and error message keeps flashing up "Used Black Cartridge In Use".
I have tried turning the printer on and off and taken the cartridges out and in again but still the same problem.