Here's a link to the user's guide that will provide you with a detailed explanation and walk-through on how to print and evaluate a print quality report specifically to you printer. The solution is too lengthy to post here.
Black printer ink in HP Photosmart may fail to be recognized by the printer. Most times an error message will be sent indicating that something is wrong with the black print cartridge. Sometimes the printer may accept to print with the black ink, but the printouts may have horizontal lines and very illegible letters. In such a case a manual cleaning of the print head should be carried out. In doing the manual cleaning, one should spray Windex heavily on paper towel and wipe off the surface of the print head.