Troubleshoot: Used Samsung laser printer producing black horizontal lines across page even when blank copy sent through printer without anything printed onto it. : r/printers
Samsung CLP-310N printing horizontal lines and ink trail smear on laser printer - Super User
Samsung CLP-620ND: How To Fix Color Streak On Printouts? – Laser Tek Services
Black Lines down the page – 4 causes & how to fix them - Toner Giant
HP LaserJet Pro MFP - Vertical Lines or Streaks When Copying or Scanning From the ADF | HP® Customer Support