Please check the following points:

• Is the paper damp?
  Check the paper and replace it if necessary.

• Are you using warped paper?
  Replace the media with a recommended size and type, and confirm that your printer driver setting are correct.

• Is the paper tray properly inserted into the printer? Push the paper tray completely back into the printer.

• Is there paper or a foreign object jammed in the printer? Turn the power off and remove the jammed paper or foreign object.
  To see how to clear the paper jam, click here.

• Is the fuser unit or transfer roll cartridge properly installed in the printer? Make sure they are properly installed. To see how to replace the Fuser Unit & Transfer Roll Cartridge, click here.