Check the following points to resolve the issue:

• Shake the toner cartridge gently.

  Handle the toner cartridge carefully. If toner scatters on your hands or clothes, immediately wipe or wash it off with cold water.

• If the machine displays Replace Toner status, install a new toner cartridge.
  > Click here to see how to replace the toner cartridge.
• Check the machine's environment. Conditions such as humidity, high temperatures, and so on, may cause this print fault.
• If the whole page is too light, Toner Save Mode may be turned on. Turn off Toner Save Mode in the machine's menu settings or the printer driver.
• Clean the drum unit.
  > Click here to see how to clean the drum unit.
• Clean the corona wire on the drum unit.
  > Click here to see how to clean the corona wire.
• Replace the toner cartridge with a new toner cartridge.
  > Click here to see how to replace the toner cartridge.
• Replace the drum unit with a new drum unit.
  > Click here to see how to replace the drum unit.