I have HP photosmart 6520. My black ink won't print. I don't have "instant ink". Don't even know what it is.
Replaced the black cartridge a few months ago. Still wouldn't work. Cleaned, aligned, etc. Nothing helped, but the black ink was disappearing. Today I bought another black cartridge, and it still doesn't work. I bought the first one on Ebay. Ironically, the colors work. It's supposed to be HP. Today I got one at Kroger and it is an HP. It still won't work. I would appreciate it if an