1. Ensure that the printer is correctly connected and turned on.
2. Make sure that the paper has been properly loaded into the printer.
3. Clean and realign the print heads.
4. Replace the toner cartridge according to the directions in the printer's instruction manual.
5. Adjust the print quality settings in the printer preferences or software.
6. Check for any clogs or loose connections in the printer.
7. Run a test page from the software or printer’s control panel.
8. Check that the ink alignment and other settings are correct.