HP Printer printing black lines is a common issue. The HP Printer prints black lines, smudges, and missing areas on the paper issue faced by HP users. The HP printer printing black lines issue can occured due to dirty scanner glass, printer printhead failed, improper ink cartridges installed, and more. Fix the HP printer prints black lines and smudges on paper with simple steps. Contact HP printer experts through Free live chat or Toll-free at +1-877-614-7218.