Question about HP LaserJet 2840 Printer

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My HP 2840 printer does not print -- it displays the "replace supplies" sign although I have just put in a new black ink cartridge. Then it says rotate to black even though I've done this too! I think the other three colors - yellow, magenta and blue may need replacement as well. But I am not using the color printing feature. I have replaced the black cartridge by itself in the past, and the printer worked then. It appears that when the display says "rotating to black" the black cartridge is not in the correct position. I am told that I may need to replace the entire carousal by one of your service centers. The cost seems prohibitive - over $500! Also, replacing all the color cartridges will cost about $300 @ about $100 each. Should I try to fix this problem - if so how? Or, should I get new printer, which may be only $300? I would prefer to fix the printer rather than junking it, or may be replace the printer if I can get some sort of credit for returning the current printer. My question is somewhat long - I hope you will take the time to advise me. You can reach me o my email at sophieklf@hotmail.com. Many Thanks. Karen

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I know this printer very well. The issue is that when a cartridge reach 0% (it doesn't matter which one) the unit will stop printing. So If you have the yellow at 0 even though you dont use it the unit will not work. I dont think is the carrousel, issues with that will normaly be like noise while moving or printing in one side or faded. If you hardly use color I would recommend a new one, the maintenance of a color laser unit is very high

Posted on Sep 07, 2010

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Posted on Jan 02, 2017

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1 Answer

I have only black toner, colors are out. How can I keep printing? It sends a message: "replace supplies".


You need a supply of ink in both cartridges in order to print. Even if you are only printing black ink and there is a black ink cartridge with ink in it, your printer will not print without the color catridge installed and it has to have a supply of ink in it. I wish I had better news for you, but unfortunately I don't.

Aug 17, 2011 | HP LaserJet 2840 Printer

1 Answer

We have an HP Color Laserjet 2840 printer in our office. We were low on our black ink drum, bought a new drum and installed it. Copies are coming out perfectly but the "replace black...


The 2840 is a slightly different sort of machine when it comes to supplies. There is a main imaging drum unit which works for all four colors, and then there of course are the 4 colors. If the unit was asking for a drum unit then you should have instaled a Q3964A. It is entirely possible that your drum unit and black cartridge both expired at the same time, in which case, you need a black toner cartridge now.

Jul 28, 2011 | HP LaserJet 2840 All-In-One Printer

1 Answer

I have HP laserjet all in one 2840. got massage replace supplies. replace black ink. massage still there. printer does not work. please help tell me what to do thanks, Troy


Did you purchase a new cartridge or refill? These supplies have a non-resetable chip on them that must be replaced when a cartridge is refilled. If it is an new HP original cartridge, contact HP and have them replace it. If it is a refill, contact whoever you bought it from and get them to replace it.

Apr 14, 2011 | HP LaserJet 2840 All-In-One Printer

1 Answer

My printer won't print---I just had the black ink cartridege refilled but it keeps saying replace supplies


Return the cartridge and use only genuine supplies with HP. HP cartridges have chips on them that dictate if they are OEM or not. Typically, if you use a refiller , these chips won't get reset.

Oct 20, 2010 | HP LaserJet 2840 Printer

1 Answer

Hp color laserjet 2840 - prints one page in color, next in black & white. Yellow ink cartridge light blinking. Says "replace supply, using black only". Yellow wasn't showing as low previously.


Follow each of these steps until the problem is resolved:

Print a printer self-test by holding the power button down with a pencil and opening and closing the top cover four times.
Check the nozzle self-test pattern in the self-test print out. If one or more of the solid rectangular areas are missing, an electrical contact problem may be present.
Remove and then reinsert the print cartridge(s) into the printer.
Print the document.
If the problem persists, follow the steps listed above for cleaning the print cartridges and print cartridge cradle.
Try printing again. If the problem continues, replace the print cartridges.

http://www.fixya.com/support/t5717191-hp_deskjet_6540_printer_yellow_light

Jun 18, 2010 | 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, 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

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

2 Answers

Ink cartridge light keeps blinking


you need to print only in black if that is all the ink you have, and also you need to remove the color cartridge as it still registers in the printer as able to be used, although it is empty or near so. Did you remove the tape over the print head fron the new ink cartridge? Do a print head alignment, or use the toolbox icon to tell the printer that you just replaced the cartridge. Some HP models chip the ink cartridges so even a refill wont register as a full tank and the printer wont print. chip needs to be reset (difficult) or just replaced with a new cartridge.

Jul 07, 2008 | HP DeskJet 940c InkJet Printer

1 Answer

Hp 2840 "Replace supplies"


If one of the color cartridges runs out the machine will switch to black only mode. However, I have found no way to force it to continue printing in color mode when any one of the cartridges runs out.

Apr 26, 2008 | HP LaserJet 2840 Printer

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