$ cat samsung-xpress-c460fw.txt Incompatible Toner Samsung ships updates over the wire and blocks 3rd party toners (?) No real solution as yet See Toner Mod below Tech Mode Reference Video - https://www.youtube.com/watch?v=0ErCyT0SA9w Access menu * Menu, #, 1, 9, 3, 4, Menu * Pass code in Tech Menu is always 1934 Toner Mod * Remove the toner chip from a legit cart * From the 3rd party cart remove the two screws from the chip retainer * Replace the 3rd party toner chip with the legit chip You seem to lose access to toner levels after that but can still print and a big FU to all printer manufacturers