Every time load a new ink cartridge and close the door an error comes on that says that says another color is missing though it isn't. I reload it just in case, and it says yet another color is missing, even the toner box. I have to go through unknown acrobats until all of a sudden it will calibrate and all will be fine. This time though I can't get it to calibrate and is unusable though all I did was install a new cartridge.