Check the following points to resolve the issue.
 

• Select the appropriate media type in the printer driver.
• (Not available for some models)
  Select the appropriate media type in the menu setting.
• The issue may disappear by itself. Print multiple blank pages to clear this issue, especially if the machine has not been used for a long time.
• Clean the drum unit.
  > Click here to see how to clean the drum unit.
• The drum unit may be damaged. Replace the drum unit with a new drum unit.
  > Click here to see how to replace the drum unit.