Colors are shifted or not lined up properly.
Reason:
Color registration is incorrect.
Solution:
Color registration needs to be reset. See “Color Registration.” It is recommended that you reset color registration when you change toner or image drums, when you load paper in the paper tray, or if you move the printer.
Blank sheets printed/one or more colors missing.
Reason:
Empty or missing toner cartridge.
Solution:
Install new toner cartridge.
Reason:
Image drum contacts may have failed.
Solution:
Remove the appropriate image drum(s) and examine the contacts on the left side of the drum and on the left side inside the printer. Clean them if necessary, then reinstall the image drum(s).
Reason:
LED array connection may have failed.
Solution:
Contact your service representative.