Hi, You may be out of black ink. I don't know if it's HP thing or Windows thing but black regular documents are forced to be printed with black ink, when it's out, the printer gives back blank paper. Try removing black ink cartridge only, printer will then switch to mix it's colours to make black and then try. Also try changing text colour while printing to see if it's print. You can also download HP software and print test page. If it'll work, it means you're out of black ink