The Cartridge Error message appears if the toner cartridge is not installed correctly.

Remove the toner cartridge and drum unit assembly. Take out the toner cartridge, and put it back in the drum unit again. Reinstall the toner cartridge and drum unit assembly in the machine.

> Click here to see how to reinstall the toner cartridges.

If the issue continues, contact your local Brother dealer or Brother Customer Service from the "Contact Us" section.