Dennis' Canon printer isn't working anymore. He's replaced the cartridges, but it still doesn't print. What can he do? Leo says that if he goes into the printer setup and looks in the maintenance manual, there will be a "clean print head" utility. There's a good chance that ink has dried into the head and the clean print head utility will clear that out. He should run it several times. If he still gets nothing, there's a good chance the print head has died. But some models replace the print head when replacing the cartridges.