SOURCE: there are three dots in a row on every printed
Locate and check the printer drum. You should be able to see the mark that is causing the line on your page. It could be a scratch or a ring of toner that the wiper is not picking up because a nick or something under it. Try cleaning the drum with a very soft dry cloth and inspect it again. If the mark is still there the drum will have to be replaced. Do Not Try To Clean The Drum With Any Type Of Solvent!
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