Seeing an “Ink Cartridge Not Recognized” or “Cartridge Problem” message on your HP printer is frustrating, but it’s usually fixable without professional tools. This issue can be caused by dirty contacts, poorly seated cartridges, outdated firmware, counterfeit cartridges, or simple communication errors between the printer and cartridge. Follow these step-by-step solutions below — and if you’d like live assistance, call 1-844-957-6312 for guided help.