We know HP, Canon, and Epson printers are the main brand of printers. These are used in daily home and business work like scanning, copying, and printing documents. Sometimes many users facing problems with the printer is printing black lines on a document. These errors are in the form of horizontal or vertical, dotted lines, fading lines, etc. So printing quality is a not good show on the document. HP printer printing 2 types of error printing, one is black lines error and other is whites’ lines error. We already discuss the previous blog with Fix White Lining Error in the printer . These problems show as print as white horizontal lines form. Blacklines error printer vertical left or right side of the document or paper. These are printing the document black smudge and missing some print area. Here we mention printing the document issues are a form Black lines printing vertical lines on-page, left, right, and middle Missing part print Smudges print How we can fix