Follow the steps below to clear the message:

• The corona wires have become dirty. Clean the corona wires in the drum unit.

  Click here to see how to clean the corona wires.

  
  

• The drum unit or the toner cartridge and drum unit assembly is not installed correctly. Reinstall the toner cartridge and drum unit assembly.

  • Click here to see how to reinstall the toner cartridge.

  • Click here to see how to reinstall the drum unit.

  
  

• If the issue still continues, the drum unit is at the end of its life. Replace the drum unit with a new one.

  Click here to see how to replace the drum unit.