How to Replace an Empty Ink Cartridge in the HP Deskjet 3521 e-All-in-One series – an Illustrated Tutorial in 10 Steps


Make sure you purchase the right ink cartridges for your specific printer and printer region or have your old ones refilled. Cartridges are not compatible between different brands, and often not within the same brand. Unlike other inkjet manufacturers, HP often designs its inkjet hardware to use country-specific consumables. When you unbox a new HP inkjet printer and set it up, you install a set of ink tanks that ship with the printer. As you turn on the device and get ready to use it, an initialization sequence localizes it to the country associated with the ink cartridges you installed.

HP recommends that you use original HP ink cartridges. XL (Extra Large) cartridges cost more but do provide better value in the long run. They will be able to print at least double the pages of a regular cartridge. Our advice is that if you print often, go with XL. However, ink can dry up. So if you are not a frequent printer, go with the regular cartridges.

You can easily check the ink supply level to determine how soon you might need to replace a cartridge. The ink supply level shows an estimate of the amount of ink remaining in the cartridges. You can check the estimated ink levels from the printer software or from the printer control panel.

To check the ink levels from the control panel
From the Control Panel home screen, which displays Copy, Scan, and Quick Forms, select Ink Levels.
Then the printer displays the current ink levels.

To check the ink levels from the Printer Software
1. Double-click the HP Deskjet 3521 series desktop icon to open the Printer Software. You can also access the Printer Software by clicking Start > All Programs > HP > HP Deskjet 3520 series > HP Deskjet 3521 series
2. In the Printer Software, click Estimated Ink Levels.

Ink level warnings and indicators provide estimates for planning purposes only. When you receive a low-ink warning message, consider having a replacement cartridge available to avoid possible printing delays. You do not have to replace the cartridges until the print quality is unacceptable.

Which ink cartridges do I need for my HP Deskjet 3521 e-All-in-One series printer?

For your US HP Deskjet 3521 e-All-in-One series printer you need HP 564 Black and HP 564 Cyan/Magenta/Yellow cartridges.
There are also Combo Packs (4 cartridges in one pack) available, like the HP 564XL Black 564 Color Ink Cartridges Combo Pack.
For your European or UK HP Deskjet 3521 e-All-in-One series printer you need HP 364 cartridges.
There are also Combo Packs (4 cartridges in one pack) available, like the HP 364 Black, Cyan, Magenta, Yellow – Original Ink Cartridge Combo Content Pack – Standard Capacity.

Replace the cartridges.

1. Check that power is on. If the product is off, press the Power button to turn on the product. Wait until the product is idle and silent before continuing.

2. Before you install the ink cartridges, load unused, plain white letter or A4-sized paper in the tray, if you have not already done so.

Remove the old cartridge
3. Open the cartridge access door. Grasp the handles on either side of the cartridge access door, and then raise the door until it locks into place. The carriage moves to the access area. Wait for print carriage to move to right side of product.

4. Press the tab on the front of the cartridge inward to release it, and then pull up on the cartridge to remove it from the slot.

Insert the new cartridge
5. Pull the orange tab to remove the plastic wrap from the new cartridge.

! Do not touch the copper-colored electrical contacts and ink port !
Make sure you remove the plastic wrap from the ink cartridge before installing it in the product, or printing will fail. When you remove the plastic wrap, the paper label on the top of the cartridge tears slightly, which is necessary to vent the cartridge.

6. Remove the orange cap from the cartridge. Twist the cap counter-clockwise until it snaps off. A forceful twist may be required to remove the cap.

hp cartridge01

7. With the nozzle and the contacts facing down, push the cartridge into its slot until it clicks into place. Make sure that the color icon on the cartridge label matches the color icon on the slot.

8. Repeat step 4 to 7 for each ink cartridge you are replacing.

9. Close the cartridge access door.

Align the cartridges when prompted to do so
10. After you load new cartridges and close the cartridge access door, the printer automatically prompts you to print an alignment page.

a. On the product control panel, press OK. The product prints an alignment page.
b. Open the lid.

c. Place the alignment page on the scanner glass with the printed side down, and then position it on the front right corner of the glass.

d. Close the lid.
e. Press OK. The product scans the alignment page.
f. Follow the control panel instructions to complete the alignment.
g. Recycle or discard the alignment page.

The alignment page did not print?
If the alignment page did not print automatically, you can align the cartridges manually from the printer software and from the printer display on the product.

To align the cartridges from the Printer Software
– In the Printer Software, click Print and Scan and then click Maintain Your Printer to access the Printer Toolbox.
– The Printer Toolbox appears.
– Click Align Printheads on the Device Services tab. The product prints an alignment sheet.
– Go to step b.

How to Replace an Empty Ink Cartridge in the HP OfficeJet Pro 7720 Wide Format All-in-One series Printer – an Illustrated Tutorial in 8 Steps


Make sure you purchase the right ink cartridges for your specific printer and printer region or have your old ones refilled. Cartridges are not compatible between different brands, and often not within the same brand. Unlike other inkjet manufacturers, HP often designs its inkjet hardware to use country-specific consumables. When you unbox a new HP inkjet printer and set it up, you install a set of ink tanks that ship with the printer. As you turn on the device and get ready to use it, an initialization sequence localizes it to the country associated with the ink cartridges you installed.

HP recommends that you use Original HP ink cartridges. XL (Extra Large) cartridges cost more but do provide better value in the long run. The XL versions of the cartridges for your HP OfficeJet Pro 7720 will be able to print at least double the pages of a regular cartridge. Our advice is that if you print often, go with XL. However, ink can dry up. So if you are not a frequent printer, go with the regular cartridges. You can check the estimated ink levels from the printer software or from the printer control panel.

To check the estimated ink levels from the printer control panel
– Touch or swipe down the tab at the top of the screen to open the Dashboard, and then touch the Ink Icon (see below) to check the estimated ink levels.

The control panel displays estimated ink levels. The amount of color shown within a column represents how much ink remains in the ink cartridge of that color.

Ink level alerts and indicators provide estimates for planning purposes only. When you receive a low-ink alert, consider having a replacement cartridge available to avoid possible printing delays. You do not have to replace the cartridges until you are prompted to do so. HP recommends that you replace any missing cartridges as soon as possible to avoid print quality issues and possible extra ink usage or damage to the ink system. Never turn off the printer when ink cartridges are missing.

Which ink cartridges do I need for my HP OfficeJet Pro 7720 Wide Format All-in-One series Printer?

For your US HP OfficeJet Pro 7720 Wide Format All-in-One series Printer you need a
HP 952 Black Ink Cartridge and 3 color cartridges: HP 952 Cyan, HP 952 Magenta and HP 952 Yellow.
There are also Combo Packs (4 cartridges in one pack) available, like the HP 952XL Black and 952 Tri-color (Cyan, Magenta, Yellow) Combo Pack.

For your European or UK HP OfficeJet Pro 7720 Wide Format All-in-One series Printer you need a HP 953 Black Ink Cartridge and 3 color cartridges: HP 953 Cyan, HP 953 Magenta and HP 953 Yellow.

Replace the cartridges

1. Turn the printer on by pressing the power button, if it is not already turned on. Wait until the product is idle and silent before continuing.

2. Load Letter, A4, or Legal unused plain white paper into the paper tray.

Remove the empty cartridge
3. Slip your fingers behind the groove on the right-hand side of the printer, and then pull forward to open the cartridge access door. Wait until the carriage is idle and silent before you continue.

4. Find the cartridge you want to replace. Push in on the front of the cartridge to release it, and then pull it toward you to remove it from its slot.

Detailed image: Removing the empty cartridge from its slot.

Insert new cartridge
5. Remove the new ink cartridge from its packaging. Be careful to touch only the black plastic on the cartridge. Do NOT touch the electrical contacts and ink port.

6. Hold the new cartridge so that the cartridge contacts face the printer. Using the color-coded letters for help, slide the ink cartridge into the empty slot until until it clicks into place and it is securely installed in the slot.

Detailed image: Inserting the new cartridge into its slot. Make sure that you insert the ink cartridge into the slot that has the same colored letter as the color you are installing.

7. Repeat steps 4 through 6 for each ink cartridge you are replacing. Make sure no ink cartridge is sticking out farther than the others. If an ink cartridge is sticking out, push it until it snaps into place.

8. Close the print-carriage access door and wait until the warm-up sequence finishes and your printer is quiet before you proceed.

Align the printhead only if necessary.
The printer automatically aligns the printhead during the initial setup. You might want to use this feature when the printer status page shows streaking or white lines through any of the blocks of color or if you are having print quality issues with your printouts. You can align the printhead from the printer’s control panel and from printer’s software.

From the printer control panel:
– Swipe down to open the Dashboard, and then touch the Setup icon.
– Swipe up on the display, and then touch Printer Maintenance.
– Touch Align Printhead, and then touch Continue.
An alignment page prints.

From the HP printer software:
Open the HP printer software.
– Click Print, Scan, & Fax, and then click Maintain Your Printer to access the Printer Toolbox.
– In Printer Toolbox, click Align Printheads on the Device Services tab.
The printer prints an alignment sheet.