Most likely
The computer can’t talk to the printer properly
The printer hardware works, because it prints its own page. The link between computer and printer is the problem: a missing or broken driver, a stuck queue, or the wrong printer selected.
What to do
- Open the print queue and cancel any stuck jobs.
- Restart the print spooler (Windows) or reset the queue (Mac).
- Update or reinstall the driver from the maker’s site.
- Print the computer test page to confirm.
Then reprint: Light-ink black and white page