Ensure the media type is set for the paper being used, if it's set to a lower quality, quality lines or graphics may be missing.

If any of the cartridges are below the lower ink level, replace them.

Ensure the paper is loaded correctly in the tray and make sure no paper is jammed in the printer.

Ensure the print quality is set to your desired level, higher resolutions will provide greater picture resolution.

Perform routine printer maintenance regularly; use the printer's Contol-Panel menu and run the cleaning cycle.

Examine the printhead for residue buildup, and use water and a cloth to clean any dust or debris from the head.