Deskjet 6840

Deskjet 6840

Cartridge prices starting at $9.95

Print photos without a PC with the HP Deskjet 6840. With the printer's front USB port and PictBridge-enabled cameras, direct photo printing is made easier and more convenient. It also offers built-in networking and 802.11g wireless printing, so this can be shared with up to five PCs. Plus, it helps improve productivity with its fast printing speeds of up to 30 ppm laser-quality black and up to 20 ppm color. With all these benefits, would you let this printer run low on ink at any time? No, right? So, stock up on replacement ink cartridges—get affordable but high-quality remanufactured ink cartridges here at We've got single ink cartridges, including the remanufactured HP 94 Black, and combo packs for your multiple cartridge replacement needs. Shop here now!

Shop Cartridges for Deskjet 6840, Deskjet 6840dt, Deskjet 6840xi


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Deskjet 6840

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How to Replace Cartridge(s)

Change the ink cartridge on the HP Deskjet 6840 with these steps:


  1. Make sure the printer is turned on.
  2. Open the printer cover, and then wait until the print cartridge cradle is idle and silent.
  3. Press down lightly on top of the cartridge latch.
  4. Pull out the bottom of the latch to unhook it, and then slide the cartridge out.
  5. Remove the protective tape from the new toner cartridge.
  6. Hold the print cartridge so the nozzles are down and the contacts face toward the printer. Then, slide the cartridge into the carriage.
  7. Push down on the print cartridge latch until it snaps closed.
  8. Close the printer cover.


Frequently Asked Questions


What is the difference between the tri-color cartridge and the single color cartridge?

A tri-color cartridge contains cyan, magenta, and yellow inks, while a single color cartridge contains only, as its name implies, a single color like yellow. The main advantage of the tri-color over the single color cartridge is that it is smaller than three separate color cartridges, so the Deskjet 6840 has a compact size too.


Is it ideal to get the Remanufactured HP 96 Black High-Yield for my HP Deskjet 6840?

Well, it depends on your printer use. If you are a heavy printer user, the Remanufactured High-Yield HP 96 Black makes a better option.


If I placed my order before 3:00PM PST, will it ship the same day?

Yes, if the order is placed on weekdays and Saturdays. But if you placed it on a Sunday, holiday, or after 3:00PM, it will be shipped the next business day.