Question about HP LaserJet 2840 Printer

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Black lines on copies when run thru fax feeder

When we make copies running thru the fax/ copy they come out with 2 black lines on each side of the paper about 3" from the edge. What is this coming from?

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  • iswallace Jul 09, 2008

    When I run a paper through the fax/copy feeder upon completion the copy has 2 black vertical black lines running from top to bottom. I replaced the imaging drum and a black cartridge. The lines are still there.



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There is a thin strip of glass that you will see when you lift the top feeder. There is most likely white-out on it.

When you use the top feeder, it doesn't use the large glass, it only 'rolls' the original document over this small strip of glass.

Posted on Jan 18, 2008


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1 Answer

I have a Epson cx11 and get a black vertical line down the middle of scans and copies

Check your flat bed and Document feeder scanning glass need to be clean, if any dot or dust in scanning glass of document feeder it will appear a line, check this points first
1- Check printouts from computer or FAX if it is clean problem in scanning section
2- Check using Copying a blank paper using only Flatbed if it prints without any line its problem from document feeder Scanning glass
So solution is clean the Document feeder scanning glass using wet cloth, note careful about wet cloth switch off the machine and clean it

Feb 04, 2013 | Epson AcuLaser CX11NF Printer

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Black line running down the middle of the page when faxing or copying using automatic feed tray. If I lift lid and copy no line. Receiving fax not line?

Generally this problem is due to the the glass under the lid being dirty. Some combo units have 2 scanning areas, the large one you are using to copy ans a small one it runs the faxes through. I suggest you clean any and all glass you can find on the machine and give it another go.

May 04, 2011 | Brother Office Equipment & Supplies

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We have a black line down the center of all copies...

If the problem only happens on copies or sent faxes then no it is not your drum. There is something on your scan glass. My guess is you are getting the line on your copies when you run the original through the document feeder. If you get lines through the document feeder but not on copies made off the glass then it is a dirty scan glass. There is a thin glass strip where the document feeder feeds the original. Usually something like white out that did not dry smears off an original and ends up on this thin strip of glass. Scratch it off with your finger nail and use some glass cleaner to resolve the problem. The scan glass is about 1/2 an inch to an inch wide and will be on the same side of the machine that the copier feeds the originals in on

May 20, 2010 | Office Equipment & Supplies

1 Answer


You have white out or some other white substance blocking your scanner optics. I am assuming this is a thin blank line. What you need to do is make a copy of a document with your machine. You should see the very same blank line on your copy that your customer is seeing on their received fax. Now take this copy and place it in the document feeder the same way you placed the document when you made your copy. Now imagine this document going thru the feeder. The strip that is blank will "match up" with the white out or whatever is causing the blank line. You just need to open up the feeder section where the documents go in to be scanned and look for the thin strip of glass that runs from one side to the other. Using the copy you made with the blank line, use it to see exactly where the glass should have something stuck to it and clean it off with a soft clotch with a little glass cleaner on it. Go ahead and clean the while glass while you are in there. Once clean you can close it back up and run another copy to insure that all the lines are gone.
Good Luck and Thank You for using Fixya.

May 12, 2010 | Canon L220 Plain Paper Laser Fax

1 Answer

Leaving a wide black line in right hand side of transaction

Pop open the fax document feeder, and look for a glass strip about 1cm wide, that runs from left to right across the machine.
You will probably see a few spots of dirt, or more commonly, a blob of white liquid paper stuck on the glass, on the side of the machine that corresponds to the black lines on your fax.
Clean this glass strip gently, using a soft cloth dampened with a mild detergent. I often use diluted windex. You may need to scrape liquid paper gently with your fingernail. Close the cover.

Next, put a blank sheet into the feeder and make a copy of the blank page. If you have cleaned it properly, the copy will be blank as well. If you still have a line, align it with the feeder and use this as a guide to show you where the glass may still have some **** stuck on it.

Good luck!

Dec 04, 2009 | Brother IntelliFAX 4100 Laser Fax

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Brother Intellifax 1" black line on right in send & copy modes

lift up your document feeder and check for something on the **** glass

Nov 16, 2009 | Brother IntelliFAX 4100 Laser Fax

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I have a black streak all on one side when i copy ?

If it is just when you copy and not when you print then it is a cleaning issue. Toner cartridge would cause the line to appear on copies, printouts and faxes. There is a piece of glass inside the auto document feeder that is probably dirty. Open up the document feeder as if you were clearing an original document jam. Look for a piece of glass inside the ADF, it will run the length of the document feeder. There is probably some dirt or another popular problem is white out. Clean off the glass with glass cleaner or alcohol and it should fix the problem.

Oct 04, 2009 | Brother IntelliFAX 4100 Laser Fax

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When sending a fax, black lines runs thru entire fax, what to do?

Clean off the glass where the paper runs through.You have some dirt or other substance that is blocking the light for copying or faxing.

Apr 20, 2009 | Canon PIXMA MX310 All-In-One Printer

2 Answers

Black lines

There is a thin strip of glass that you will see when you lift the top feeder. There is most likely white-out on it.

When you use the top feeder, it doesn't use the large glass, it only 'rolls' the original document over this small strip of glass.

Jan 18, 2008 | HP LaserJet 2840 Printer

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