As you may or may not be aware, HP have recently installed timed firmware updates onto several printers, including the Officejet Pro X451dw, X476dw, X551dw and X576dw printers which may have disabled the functionality of compatible cartridges in your printer.
The good news is that HP have now made a fix available in the form of a downloadable firmware update from their support site.
If you encounter problems with your printer when installing our compatible cartridges, particularly when displaying the ‘Missing or Damaged Cartridges’ error message, then we recommend searching for the correct new firmware for your printer (and correct PC operating system) from the following link: HP Support & Drivers
1) Once on the correct page for your printer model, you should see a Blue ‘Download’ button. Click the button and select ‘Save as’.
2) Once the file has downloaded, run the file (Usually found in your Windows 'Downloads' folder) and this should then be uploaded to your printer, re-enabling your compatible cartridges once again.
*Inkredible.co.uk do not take any responsibility for failed Firmware updates and as such, they are only to be undertaken at the customers own risk.
Let us know if this re-enables compatible cartridges for you!