Check the following points to resolve the issue:
 

• Try to print 10-15 blank pages or make 10-15 copies of a blank, white sheet of paper. If the issue is not resolved after printing the blank pages, the drum unit may have foreign material, such as glue from a label, stuck on the drum. 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.