Question about HP LaserJet 2840 Printer

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HP Laser Jet 2840 Printer

When I copy and print I get a black line running from top to bottom.
What's wrong.

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If it's scan and copy only and not when you send a job from the computer your solution is easy to remedy. Try going into the menu located on the printer to info menu. Scroll down to conguration page and click the check button. When the printer prints, if the line is not on the page you simply have ink or white-out on the scan glass for the ADF (auto doc feeder).

To clean the ADF glass, lift the top lid to expose the glass. There are two peices, 1 large full size and one strip peice. If your getting the line when using the auto feeder (without lifting top) pay close attention to the strip of glass. When a document is auto-fed it moves the original past the strip of glass. A dot (pen mark or white-out) will appear as a line on your final copy.

Clean well with windex or similar glass cleaner. PUT THE CLEANER ON THE RAG THEN THE RAG TO THE GLASS. Don't spray the glass as it's easy to get it into cracks where to don't want it to fall on an electronic part or board below the glass edges. While you at it, clean all the glass.

Test by making a copy of a "BLANK" sheet of paper with one small line to give you postion clues. First by putting it on the glass. Clean everywhere on the large glass that shows a mark on the page (except the one you purposely put there). The mark will help you locate where to clean. (example - 1" below and 2" over from your intentional mark) It also helps you identify top of page from bottom.

Once that is done do the same thing using the original in the ADF. Simply measure in from the edge of the page on the copy and find the corresponding spot on the small strip of glass.

IF YOU SHOULD BE GETTING THE LINE IN ALL FUNCTIONS, PRINT, COPY MANUALLY, AND COPY WITH ADF. Check the toner cartridge, most likely black for damage on the cartidge drum. The cartridge drum can be quickly viewed by flipping the shutter open (the part with the HP logo and part number printed on it). If there is a line, replace the cartridge.

Hope that helps you. If so hit it with a FIXYA!

Thanks,

Posted on Sep 03, 2008

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If this is happening when copies are made only and not on prints from the computer, lift the top doc feeder lid and located the strip of glass. You should be able to locate a spot of ink or white-out or something else on the glass strip. The scanner for the doc feeder moves the original paper over this strip window to scan it. A dot will appear as a line. Put some Windex or similar glass cleaner on a rag and clean the glass well. Shoot, while you have it open clean all the glass and all your copies will look better.

If it's happening in copy and printer mode (sent from computer), check the toner caridge for damage to the drum. To check the drum, simply flip open the shutter that has the HP logo and part number on it. You'll see a black tab hanging out past the left handle. Move the tag downward to momentarily view the drum. Keep the drum out of direct sunlight or bright lights as they are light sensative.

If there is a line on the drum, replace the cartridge.

Hope that helps you. If so, hit me with a FIXYA. If not click on my user name and let me know what you find so I can isolate it further for you.

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