Thanks for helping here. The paper feed you're referring to is the long black roller that almost spans the width of the printer, just below the ink tanks? I've wiped that with a microfiber cloth. Shook it. And it's the same. The grinding/clicking is quite loud and seems to be coming from the right side of the printer.
No one else is answering so I would assume they agree with you. Do you think this is worth taking it somewhere to fix?