Thanks for taking an interest in the HP Support Forums! After reading your post I see that you are getting cartridge failed please replace the cartridge error message on HP Photosmart a516 printer. I would like to help you out with this issue today.
Remove, inspect, and reseat the print cartridge.
Clean the print cartridge and carriage contacts.
Repeat reseating and cleaning steps.
Click here and follow the document to perform the above steps.
Let me know how it goes.
Sandytechy20 I am an HP Employee
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