Question about HP LaserJet 2840 Printer

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HP Colour Laserjet 2840

I have a similar problem whereby I have replaced the drum and cartridges, but the image is printing one half OK and the other fading to white. This happens length ways down an A4 sheet.

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The only solution to this problem is to replace the drum. For most low-cost home printers, the drum is part of the toner assembly and is automatically replaced each time you install a new toner cartridge (which explains part of the cartridge’s high cost). More industrial-strength laser printers place the drum on a separate EP (electrophotographic) “engine” that can be replaced in just a few easy steps. Check your printer’s documentation and replace the appropriate assembly (or have someone do it for you), and the repeating marks should go away

Posted on Mar 15, 2008

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This could either be a physical problem where the faded side is crooked, check all the hinges and make sure everything is seated properly?

Was the printer ever taken apart? It could have been reassembled wrong.

If all looks good then suspect the printhead(s).

I will try to have more information for you on Monday as I am leaving work now.

Good Luck!

Posted on Mar 14, 2008

  • Dean Joly
    Dean Joly Mar 15, 2008

    You already changed the drum so it's either that the drum is crooked or their is a power problem or a electrical contact problem. First this would be to try reseating the drum.

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Laser printers work by creating latent images on a rotating, light-sensitive drum and then attracting toner to exposed points on that drum. If any point on the drum’s light-sensitive surface is damaged, you may notice that toner is always attracted to that point, thereby transferring to the final page and appearing as a repeating mark. Because the drum is a cylinder, such marks will appear at equal distances down the page, corresponding to each rotation of the drum (maybe every two inches, for example).

The only solution to this problem is to replace the drum. For most low-cost home printers, the drum is part of the toner assembly and is automatically replaced each time you install a new toner cartridge (which explains part of the cartridge’s high cost). More industrial-strength laser printers place the drum on a separate EP (electrophotographic) “engine” that can be replaced in just a few easy steps. Check your printer’s documentation and replace the appropriate assembly (or have someone do it for you), and the repeating marks should go away.

Posted on Mar 14, 2008

  • pincer
    pincer Mar 15, 2008

    Any more post Stuart, that can perfectly describe the problem?

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1 Answer

Black stripe when printing from hp laserjet 2840


Cartridge faulty...
Two ways you can find out the faulty cartridge.
1. Remove each cartridge, just flip the drum shutter & chk for any toner bands appears on drum surface.. if found replace that cartridge..
2. Go to the paint. create four colored page as shown, print & verify which colored print mixed with bads.. replace that cartrdige.. ">

Mar 01, 2014 | HP LaserJet 2840 All-In-One Printer

1 Answer

How to reset supplies on HP 2840 laserjet?


"Would like report of supplies from 2840 laserjet. How to get it to show report"

Select 'Menu" button, then select "Reports", then select "Supplies Report".

This will print the status of the four toner cartridges and the drum.

It doesn't make sense to reset toner cartridges UNLESS you refill them
first. On the HP 2840 each cartridge/drum contains a chip that measures
the life of the unit.

You can purchase toner/chip combinations online cheaper than new
cartridges. I also purchase drum chips to extend the use of my drum
until print quality actually starts to deteriorate.

I use both of these methods to save money on supplies - buy toner and
toner chips, buy drum chip to get full use of drum unit.

Hope this helps.

Mar 19, 2012 | HP LaserJet 2840 Printer

1 Answer

My hp 1010 prints only the first page. but from the second page it gives blank print. please help


shake the cartridge well and put it back & check, replace with another cartridge, check half test page if no print on paper check on image on cartridge drum( while printings approx half page open the door remove cartridge & paper check print on paper,on cartridge drum) check transfer roller & replace
If no image any ware replace "Power supply PCA"..

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MY HP LaserJet 2840 has a brand new Toner cartridge. Now it won't print at all and we are getting a "OPC at end of life" prompt. What does this mean?


Imaging drum reach 20,000 (black only) or 5,000 (color), replace the image drum.

Supplies life
The life of the imaging drum depends on the number of black-only or color pages that print jobs
require. Imaging-drum life is also affected each time the device calibrates because calibrating causes the imaging drum to rotate. Imaging-drum life is measured in terms of number of rotations rather than number of pages printed.
The type and length of print jobs also affects drum life. A series of short print jobs uses more drum
life than an equivalent number of pages printed in a single large job. To extend drum life, print
multiple copies of a print job at one time rather than sending the same job to the device multiple times.
The life of a print cartridge depends on the amount of toner that print jobs require. When printing text at 5% coverage, black print cartridges last an average of 5,000 pages and cyan, magenta, and
yellow print cartridges last an average of 2,000 pages. High-capacity cyan, magenta, and yellow print cartridges last an average of 4,000 pages. (A typical business letter has 5% coverage.)

Aug 18, 2011 | HP LaserJet 2840 Printer

1 Answer

I have hp laserjet 2840 i replaced imaging drum and black cartrige now my printer says incorrect yellow and i cant get it go rotate or print?


If you used a compatible cartridge (as I assume) the problem is with the cartridge "CHIP", very common on compatible cartridges, return the cartridge or replace the chip. The chip is on the top of the cartridge and can be remove.

Dec 01, 2010 | HP LaserJet 2840 All-In-One Printer

2 Answers

I have an HP color laserjet 2840 and just replace the drum not long ago, maybe back in the spring, and changed all the colour cartridges in the summer, now it's saying to replace the drum again, the...


The HP Color Laserjet 2840 Is a Very Good Reliable Printer. I'm curious if you are buying American made components or cheap components from some thrid world country sold at ahuge retailer. They really should stand behind their laser drums, but if they don't then shop over at www.officeinks.com or www.wowsuperdeal.com and Purchase American Made Toner Cartridges and Laser Drums. Office Inks has a 1 year satisfaction and quality guarantee and free return shipping if their ink, toner, drums, ribbons etc, don't make you happy. Only Ships USA Though.

Oct 15, 2009 | HP LaserJet 2840 All-In-One Printer

2 Answers

HP 2840 Prints Blank Pages


Black is used on all prints. Did you pull the tape on the new cartridge?

Jan 13, 2009 | HP LaserJet 2840 All-In-One Printer

1 Answer

HP LaserJet 2840 replace drum


Have you checked status for the drum using toolbox or solution center? Try clean the contacts on drum and opposite HV pins in printer.

Oct 20, 2008 | HP LaserJet 2840 All-In-One Printer

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For Flexer and Guest - The Imaging Drum Assy is the 5-th consumable for your printer. U can buy it as well as any toner cartridge. U can find it in the front of the 4 toner carousel with a green plastic cover. Push it to the back of the printer and pull it out straight up. The new one has orange stripes and plastics that you should remove. The Imaging Drum's life is about 20k pages (black with 5% coverage) and 5k page (colour 15% coverage)

Dec 20, 2007 | HP LaserJet 2840 Printer

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