CompAndSave is proud to offer wallet-friendly prices on our replacement HP 3940 ink cartridges with genuine-like quality and satisfaction. Why choose CompAndSave in shopping for HP DeskJet 3940 ink cartridges?

  • LOW PRICE GUARANTEE. Our HP DeskJet 3940 cartridges are designed to ensure that you will get the same number of sheets and print quality as the genuine ones at a much lesser price.
  • WORKS LIKE THE ORIGINAL. Not sure on how to install replacement HP 3940 printer cartridges? Worry no more as CompAndSave's cartridges are designed to work and perform just like the original cartridges.
  • MORE DISCOUNTS. Enjoy even bigger discounts if you order HP 3940 ink cartridges in bulk. We have single and combo pack cartridges available like our HP 21 22 combo pack of 2 ink cartridges. Make sure to explore different quantities to find the price break that suits you best.
  • NEXT DAY SHIPPING. HP DeskJet 3940 ink cartridges orders placed before 2:00 p.m. PST Monday through Friday will be processed the same day. Orders placed after 2:00 p.m. PST will be processed the following business day. Check our Shipping Policy for more information.
  • FREE SHIPPING. For U.S. orders, buy products up to $50 or more, and the shipping fee is on us!
  • SATISFACTION GUARANTEE. CompAndSave is so confident in the quality of our replacement HP 3940 cartridges that we offer a FULL refund for orders returned within ten days upon delivery. We even issue refunds or store credit up to 365 days from the purchase date! Make sure to read our Return Policy for more details.
  • WILL NOT VOID PRINTER WARRANTY. Using a replacement HP 3940 ink cartridges will never void your printer warranty. Visit our Ink Knowledge Base page for more details or contact us for any further questions.

Hurry and take advantage of our great prices for HP DeskJet 3940 ink cartridges today. SAVE Now!

HP 3940 Ink Cartridges - DeskJet 3940 Ink

Free shipping on orders $50 or more
All ink & toner come with a one-year 100% satisfaction guarantee.
Our products will never void your printer's warranty.

Replacement HP 3940 Ink Cartridges from $11.99

HP21 HP22 Ink Cartridges 2-Pack: 1 Black and 1 Color
Replacement HP21 HP22 Ink Cartridges 2-Pack - 1 HP 21 Black and 1 HP 22 Color
Retail Price: $51.99

Save $24.11 (46% off retail price)

HP Ink 21 and 22 Cartridges 3-Pack: 2 Black and 1 Color
Replacement HP Ink 21 and 22 Cartridges 3-Pack - 2 x 21 Black, 1 x 22 Color
Retail Price: $74.98

Save $36.10 (48% off retail price)

HP 21 22 Ink Cartridge Combo Pack of 5: 3 Black and 2 Tri-color
Replacement HP 21 22 Ink Cartridge Combo Pack of 5 - 3 x 21 Black, 2 x 22 Color
Retail Price: $126.97

Save $62.22 (49% off retail price)

HP 21 Ink Cartridge Black, Single Pack
CMYi Remanufactured Ink Cartridge for HP 21 Ink Cartridge - C9351AN - Black
Retail Price: $24.99

Save $13.00 (52% off retail price)

HP 22 Ink Cartridge Color, Single Pack
Replacement HP 22 Ink Cartridge - C9352AN - Color
Retail Price: $32.99

Save $16.09 (49% off retail price)


How to Install HP 3940 Ink Cartridges?

  1. Make sure that the printer is turned on and load a stack of plain white paper in the paper tray.
  2. Open the printer's top cover. The ink cartridge's carriage will automatically move, so make sure to wait for it to completely stop moving before you proceed.
  3. Lightly push down the ink cartridge that needs to be replaced to release it. Then pull it out from the printer.
  4. Get your new CompAndSave HP DeskJet 3940 ink cartridge. Open it over a sink or garbage can to avoid any messes in case it leaks as sometimes, factories tend to overfill ink cartridges. Make sure to touch the black plastic part only, then remove the covering tape that is usually bright in color as well as the plastic protective case, if there is, before installing it.
  5. Insert the new HP DeskJet 3940 cartridge to its respective slot at a slight upward angle. Gently push it in until it snaps lock into place.
  6. Close the printer's top cover and do an alignment test page.

HP 3940 Ink Cartridges FAQ

Can you use other ink cartridges in a HP printer?
Yes, you can. Just make sure that the ink cartridge that you are going to use is the right model for your printer. CompAndSave offers replacement, remanufactured, or compatible ink cartridges that are designed to match the OEM specifications. This means that you can get the same quality and number of prints without paying as much compared to original ink cartridges. For more information, click ink knowledge base and you will be redirected to the right page.
How do I know what HP ink cartridge I need?
To know the model number of the cartridge your HP printer is using, you may check the user's manual that came with your printer. You may also check the existing cartridge that is installed in your printer. In front or on the side is a label or sticker with the model number, which is usually consisted of alphanumeric characters. For example, HP DeskJet 3940 printer uses the ink cartridge that has the model code of HP 21 for the black and HP 22 for the tri-color.

Replacement HP 3940 Ink Cartridges Reviews