@Necchi-gheri73,
Welcome to HP Forums, this is a great place to get support, find answers and tips.
Thank you for posting your query, I'll be more than glad to help you out.
I understand that you are unable to print in black from your HP DeskJet 3630 All-in-One Printer.
This issue could occur if the nozzles of the cartridge that print in black are damaged or not working.
Don't worry as I have a few steps that should help fix this issue.
And here's the step by step guide for you in the link: Printer Prints a Blank Page or Does Not Print Black or Color Ink
Let me know how that works.
I hope you have a good day ahead.
Rainbow23
I am an HP Employee
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