remove and check cartridge on right

printer screen says "remove and check cartridge on right."

I tried that and it didn't work so I bought a new cartridge. It worked for a few days and now it says the same thing. I took the cartridge out and replaced it. It said realignment failed but then printed two pages. I tried to print again an hour later but again it says "remove and check cartridge on right." which is the black cartridge.

Other than buying another new cartridge is there anything youcan recommend before I go buy a new printer?

Thank you