Have you been swapping cartridges a few times too many on your HP Officejet Printer and the Incompatible Cartridge Error popped up randomly? In this video I show you a way to verify and then resolve this problem. Note if you dont have any spare cartridges around you will have to try new cartridges to test this out. It works most of the time unless your printhead or firmware is really locking the use of the cartridge.