Hello, my name is Rusty. With color printers, you need to have all of the cartridges installed in order for it to print in black and white. If that is the case, remove the black cartridge, and clean the circuit board with an alcohol swab. Sometimes the electronics can get messed up, and it causes it not to work. If the alcohol doesn't work, exchange the ink with a new cartridge, and install the new cartridge.