**AUGUST 2018 UPDATE**
As you may or may not be aware, HP have recently installed firmware updates onto several printers, including the Officejet Pro 6230 and Officejet Pro 6810/6820/6830, which may have disabled the functionality of compatible cartridges in your printer.
The good news is that HP have made a fix available in the form of downloadable firmware updates from their support site. The latest updates available are dated July 31st 2018.
If you encounter problems with your printer when installing any compatible cartridges, particularly when receiving the ‘Missing or Damaged Cartridges’ error message, then we recommend installing the latest correct firmware for your printer from the following links:
HP Officejet Pro 6810/6820
HP Officejet Pro 6830
HP Officejet Pro 6230
1) Once on the correct page for your printer model, you should see a Blue ‘Download Now’ button. Click the button and select ‘Save as’ or the file may automatically download.
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.
Let us know if this re-enables compatible cartridges for you!
*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.