• Code: C1-4110
• Display: Prepare new cyan toner cartridge.
• Description: Cyan toner is almost empty.
• Remedy: 1) Order new cyan toner cartridge because toner cartridge with level of “Low” will be exhausted soon.

• Code: C1-4120, C1-4124, C1-4140
• Display: Replace with new magenta toner cartridge.
• Description: The cyan toner cartridge is at the end of its life.
• Remedy: 1) Open the front cover. 2) Remove the cyan toner cartridge. 3) Install the new cyan toner cartridge. 4) Close the front cover.

• Code: C1-4410
• Display: Install cyan toner cartridge.
• Description: The cyan toner cartridge is not installed.
• Remedy: 1) Open the front cover. Check if the cyan toner cartridge is installed. 2) Remove and reinstall the cyan toner cartridge. 3) If the problem persists, check if the toner cartridge modular jack is contaminated or deformed. 4) Replace the cyan toner cartridge with new one.

• Code: C1-4510, C1-4513
• Display: Cyan toner cartridge is not compatible. Check users guide. New cyan toner cartridge is not compatible. Check users guide
• Description: Cyan toner cartridge is not compatible.
• Remedy: 1) Replace the cyan toner cartridge with a new one.

• Code: C1-4711, C1-4712
• Display: Toner Cartridge Failure: #. Call for service
• Description: The data of CRUM is not detected.
• Remedy: 1) Open the front cover. Check if the cyan toner cartridge is installed. 2) Remove and reinstall the cyan toner cartridge. 3) If the problem persists, check if the toner cartridge modular jack is contaminated or deformed. 4) Replace the cyan toner cartridge with new one.

• Code: C1-5110
• Display: Prepare new black toner cartridge.
• Description: Black toner is almost empty.
• Remedy: 1) Order new black toner cartridge because toner cartridge with level of “Low” will be exhausted soon.

• Code: C1-5120, C1-5124, C1-5140
• Display: Replace with new black toner cartridge
• Description: The black toner cartridge is at the end of its life.
• Remedy: 1) Open the front cover. 2) Remove the black toner cartridge. 3) Install the new black toner cartridge. 4) Close the front cover.

• Code: C1-5410
• Display: Install cyan toner cartridge.
• Description: The black toner cartridge is not installed.
• Remedy: 1) Open the front cover. Check if the black toner cartridge is installed. 2) Remove and reinstall the black toner cartridge. 3) If the problem persists, check if the toner cartridge modular jack is contaminated or deformed. 4) Replace the black toner cartridge with new one.