Is Your HP Printer Prints blacklines? The HP Printer printing Black lines when you have low or dried ink cartridges, dirty scanner glass, failed printer print head, improper ink cartridges installed and more. The issue HP Printer printing black lines can be resolved with simple steps. Printwithus HP experts has shared the simple steps to fix the printer prints blacklines issues. Also you can contact HP Printer experts through Free Live Chat or toll-free at +1-877-614-7215.