@boydhome, Welcome to the HP Support Community!
If the new ink cartridge is not detected but the printer reads the old one, it means the new ink cartridge could be defective. Is this is a HP ink cartridge?
Make sure you have tried the steps mentioned in this document - HP Printer Does not Print and Error Indicates Faulty Ink Cartridge
Ensure the plastic tape if any, is removed from the new ink cartridge before placing it in the printer.
If the issue persists and it is an HP ink cartridge that is under warranty, please reach out to the HP Technical Support team in your region regarding the replacement options.
You may create a case on the website to obtain a case number if required. Kindly watch this video to know how.
Keep me posted for any other assistance.
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Have a great day!
KUMAR0307
I am an HP Employee