Printed page with a vertical black line beside a laser printer showing black lines on paper

Laser Printer Black Lines on Paper? Here’s Why (And How to Fix It)

Laser printer black lines on paper are almost always caused by one of four parts: a dirty corona wire, a scratched or contaminated imaging drum, a worn transfer roller, or toner buildup on the fuser. The two most common causes cost nothing to fix. Before you buy anything, print a test page and look at […]

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