Good Morning,
Make sure your door sensors are shut; Make sure your media is covering the sensors. Remove the cartridges, shake them, re-insert. this fixed ours in house. Please let me know how it works for you. I am located in Boca and we manufacture inks for the Roland and other wide format printers as well. I also have techs in house so i would love to work with you as well. I look forward to speaking with you.