Question about HP LaserJet 2840 All-In-One Printer

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Black steak on copied paper

The printer makes a black streak on the paper that is copied. It only happens when making a photo copy of a page. Documents from the computer come out beautifully.

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Clean the scanner glasses, check the little glass, if it have scratches. There is a white strip across between the 2 glasses, be shure to clean it up.

Posted on Nov 03, 2008

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1 Answer

After a few copies are made, black streaks start showing up on the copies and gets worse with each successive copy


for most copier those black streaks are caused by poor cleaning of the Photo Conductor Drum these can be fix by replacing the cleaning blade. after replacing them clean the Photo Conductor Unit and make some test copies.

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Adjust the printer's lightness/darkness setting to 2-3 different variables and see if problem disappears. Look at the fusing assembly - is the roller torn or does it have any black buildup? Use caution!!! It gets HOT!

Try another toner also.

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Copier, Printer black streaks on copy or all black page


Hello sir; Either drum cleaning blade or drum cartridge needto replace.

Aug 20, 2009 | Brother Office Equipment & Supplies

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I have a BROTHER MFC- 8860DN that makes black streaks on copies


If this is only happening with copies and not straight prints, it is possible that the problem is with the scanning unit. Use the soft cloth to clean the scanner area to the left side of the machine where pages are scanned when run through the page feeder. A spec of dust or other debris in this area will appear as a streak along the length of the page.

If it occurs on all prints, You may need to replace the drum or clean the fuser unit.

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Hello sir; I believe you need to replace drum cleaning blade.

Mar 12, 2009 | HP Office Equipment & Supplies

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Print quality


The problem is that the printer is set to print on default paper.
When you use photo or other specialty paper, especially when the thickness is greater than inexpensive copy paper, the print heads need to match the paper.
Go to the control panel on the printer, and enter the type of paper you're using. Your problem of streaking will disappear.

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HP Officejet 6300 All-in-one machine makes black streaks


The problem is that that there a small piece of glass that the doc feeder use's to scan the orginal. You will have to clean the small glass it's about a half of a inch piece and is normally under the doc feeder unit. It will either be to the right side of the main copy board glass or it is under the doc feed unit where the paper goes down through the feeder. It is mostly some white out on the glass, just clean with a dam cloth with water or windex..... Good Luck

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1 Answer

Black streaks are appearing on printed page when scanning


Do the lines only show up if you use the document feeder? If so, there is something on the strip of glass where the page is scanned. Open the top to reveal the large glass area. Then open the part where the paper feeds in when using the document feeder. It will flip open from right to left. There are two pieces to this, so make sure you grasp it as low as possible. You should see a small strip of glass. Clean all the glass with a SOFT cloth. Don't spray any cleaner onto the glass, rather, spray it onto the cloth if you need any.

Good luck!

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1 Answer

HP 7410 streaks on scanning and copying


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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