Question about HP LaserJet 2840 Printer
The Drum unit is worn or defective. try another drum unit. this should take care of your problem.If it's new then get your money back and replace it.
Posted on Dec 22, 2009
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Posted on Jan 02, 2017
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First you need to determine if it's doing from both the top and the glass.
1-assuming you are using the feeder to fax,copy or scan (the part that automatically picks up the paper) it comes out with a streak. Make a copy putting the paper on the glass and look at the copy. Does it have the streak?
2-lift the top and look to the left there should be a small 1inch glass, this is where it makes the copies from the feeder, is there a dot or white out or is the glass dirty? that's your streak, the paper is moving to make the copy,so the dot now looks like a line as opposed to making a copy on the glass it just sits there so a dot will stay a dot.
2- Clean with water or alcohol.
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