If your How to Put Ink Into a HP Printer does not recognize the new ink cartridge, then make sure that you have taken off the protective tape and used the right cartridge for your printer. Take out the cartridge and install it again, clean the cartridge contacts, restart the printer and update the printer firmware. If it still persists, there might be something wrong with the cartridge or the printer. Properinstallation and regular maintenance with devicefixes.