There are 3 likely causes of a vertical deletion print quality issue (PQI) on these models- Toner, PHD Unit and Fuser. To resolve this issue the first thing we must do is rule out these consumable components.
^DELL PREFERRED ACCOUNT (DPA): Offered to U.S. residents by WebBank, who determines qualifications for and terms of credit. Promotion eligibility varies and is determined by WebBank. Taxes, shipping, and other charges are extra and vary.