Question about HP LaserJet 2840 Printer

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Replace Cathridge I have an HP 2840. It would not copy or print. The Ready light would not come up. It says "Replace cathrige". Ihave replace the black toner but to one of the color toner. Do you think replacing the color toner would get it to work?

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  • sameera1234 Jan 09, 2008

    installing catridges

  • Anonymous Jan 16, 2008

    I have the same problem. I replaced black, and although the magenta is half full, it wants me to replace magenta.

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The front panel tells you witch toner cartridge should you replace. If a supply memory error ocures then the cartridge should be replaced or exchanged with a new one. The imaging drum unit is also consumable. for "Joe 50" - there are 4 toner cartridges in the printer.

Posted on Mar 18, 2008

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I installed an original Q3971A toner into the HP 2840 laser printer, However there is still a notice to install cyan catridge. Can you help please


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Dec 18, 2015 | HP LaserJet 2840 All-In-One Printer

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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

2 Answers

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

How can I override the calibrating mode on A HP LaserJet 2840 All-In-One printer. My black toner is out and it would not print any documents, keep saying replace toner can I override this until I purchase...


You Cannot override, as the black cartridge is required for all print functions. Both B/w and Color use the black, obviously in smaller amounts in color, but it still requires it none the less. Sorry, I know you were hoping to trick the printer somehow, but with HP printers it's not an option, especially on the Laser Printer models like yours.

Dec 15, 2010 | HP LaserJet 2840 All-In-One Printer

1 Answer

Hello, despite my HP2840 Q3960A black cartridge is new, he tells me to replace it counts as printed pages at 5% coverage but at 100%. After several attempts to remove the chip and its re-enter again gives...


There may be a defect in the toner cartridge causing the odd behavior. You can try resetting the printer settings to factory default or upgrading the firmware. You can reset the settings through the printer's menu. The link below should allow you to download the latest firmware and it should provide instructions for performing the update.

HP Color LaserJet 2840 All in One Printer

Jul 16, 2010 | HP LaserJet 2840 Printer

2 Answers

HP Laserjet 2840 asked for drum replacment afther only 5300 pages but should make 20000. Prits where still perfect but now it refuses to print. Any solutions how to keep using the drum?


Check online for refill instructions and where to buy the chip to replace on the drum, most of the drums today have little chips to replace that tell the printer when they are used up, even when there's still life in them.

Dec 24, 2009 | HP LaserJet 2840 Printer

1 Answer

Replaced black toner..now printer won't print any


In this case, actually it is not the Black toner that got depleted. Here the message being displayed indicate that one of the color Toner supply need to be replaced as it got depleted and currently the printer is printing in Black and white using the Black toner cartridge.

in this case, to troubleshoot these issues please try performing the following and check for the results.

* 1. Check for the level of the toner cartridges:

a) Check from the HP Toolbox application. Here are the steps to be performed from your PC:

* Access the Toolbox software.
* Select the Status tab.
* Select the Device status option.

Here you can check for the supplies status in terms of the % remaining for each toner cartridges.

b) By checking the supplies status from the printer control panel display.

On the printer display when printer is in Ready mode the supplies status can be checked from the supplies level indicator. Each toner cartridge and the Imaging drum level will be indicated by a bar which varies according to the level of the supplies present.

c) Print the supplies status page from the printer.

* On the printer control panel menu, press Menu .
* Use the (Right Arrow) button to select Reports, and then press Enter .
* Use the (Right Arrow) button to select Supplies Status, and then press Enter .

If any of the color toner cartridges and the Imaging drum have a low supply level replace them with genuine HP print cartridges.

The part numbers of the consumables are as follows:

* Black print cartridge - Q3960A
* Cyan print cartridge - Q3971A
* Magenta print cartridge - Q3973A
* Yellow print cartridge - Q3972A
* Imaging Drum - Q3964A

Sep 23, 2009 | HP LaserJet 2840 Printer

1 Answer

HP 2840 *(Error Message) = replace supply using black only Will only print in black All color and black toner are 75% or more full The drum was low so I replaced it just in case but error message remains.


By repalce supplies, it means that you have to replace the other toner cartridges and that it is only going to print black only

Al
Eliteprintersolutions@gmail.com

Apr 14, 2009 | HP LaserJet 2840 Printer

1 Answer

HP 2840, black ink drum q3964a


Hello, these printers tend to be finicky.

In other words, just replace the black toner. When the printer says its low, or empty, regardless of wether or not it is, just replace it.

Replacing the drum, when it says black toner needs to be replaced will do nothing to rectify the issue.

Buy only HP Toner and Drum cartridges for this printer. Do not try to refill toner cartridges, and do not reset drum. You will only end up destroying your printer in the process.

Feb 26, 2009 | HP LaserJet 2840 All-In-One Printer

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