Answer to: Colour cartridges full but not printing100% EASY FIX!!! 1. Take out all your print cartridges from the print head. 2. Take Canned Air (with the straw attached) and shoot air into the small hole in the printhead where the ink is sucked out of the cartridge. Your problem is a clogged line. The air will clear the line for you. Caution--Small ink splatters may occur. Wear gloves and an apron. 3. Run through the cleaning cycle one time. 4. Print test page. Your problem should be solved.