Hi kj_kayina,
I would like to help you with your Deskjet Ink Advantage 2515 All-in-One Printer, I understand it is not printing black ink.
Since the printer is working, but the printed output has no black, or is missing one or more colors, or is blank, or has very little ink, I suggest using the following document to troubleshoot Print Quality Issues.
If the issue persists, It would be best to call HP to check if your ink supplies can be replaced under warranty. The number to call HP is 1-800-474-6836 for Canada and US, or you can Contact HP Worldwide.
You could also go to hp.com/go/learnaboutsupplies , select your country, and look for ‘ink supplies warranty’.
I hope this helps, thanks for reaching out to the HP Forums.