HP printer won't recognize new ink cartridge: Restart the machine and it should now work. If not, you may have to clean the cartridge. Some of HP's newer model laser printers have a setting that only allows original HP toners to be used in the printer. If this is switched on, it will reject all non-original toners.

HP's “dynamic security” prevents you from using third-party ink with HP printers. While HP does this to “protect the quality of our customer experience,” being able to buy cheaper, non-HP ink can save you money.

Cartridges incompatible, incorrect, or not intended for use in the printer. Compatibility errors can occur when the installed cartridges are made for a different printer or country/region or the connection between the cartridges and printer is poor. Identify your cartridge or bottle type to continue troubleshooting.