05-29-2014 09:28 AM
Welcome to the forums Gill_B, I hope you are doing well
I saw your post about your Officejet 8500A not printing in red ink. I am here to offer you my suggestion that may help!
Follow the steps in this guide: Printer Does Not Print Black Ink or Color Ink, or Prints Blank Pages
If the troubleshooting does not help resolve your issue, I would then suggest calling HP's Technical Support to see about further options for you. If you are calling within North America, the number is 1-800-474-6836 and for all other regions: click here.
Thank you for posting in the community!
Have an awesome Thursday