A single sheet of media might be defective. Try reprinting the job.
The moisture content of the media is uneven or the media has moist spots on the surface.
Try printing on different media. See
Device media specifications
for more information.
The media lot is bad. The manufacturing processes can cause some areas to reject toner.
Try a different type of media.
The print cartridge might be defective. See
HP LaserJet print cartridges
For Windows printer drivers, check Type is: on the Paper tab or the Paper/Quality tab,
and make sure that it is set to the appropriate media. See
Optimizing print quality for
For Macintosh printer drivers, check Type is: on the Paper/Quality tab or the Paper tab
(the Paper Type/Quality tab for some Macintosh drivers), and make sure that it is set to
the appropriate media. See
Optimizing print quality for media types
If these steps do not correct the problem, contact an HP-authorized dealer or service
representative. See the support flyer that came with your device for information about