Officejet Pro 8720 not printing black

[pfnc]

Hi Guys,

I recently replaced all the ink cartridges in our officejet pro 8720.   All cartridges are showing as full but when I try to print the black ink will not work.  I have tried doing all the maintenance steps guided by the printer but nothing has worked so far.

Any ideas on how to fix it - replacing  the ink as rather expensive so I'd like to save the printer if possible

TIA

[atharva_gp]

@pfnc,

Thanks for reaching out to the HP Support community!

• Have you tried cleaning the print head?
• Do you face the same issue while making a copy?

Let's try these steps:

Step 1: Power Reset

• Make sure this printer is plugged into a direct wall, not a surge protector.
• Turn the printer on.
• Wait until the printer is idle and silent before you continue.
• Remove all of your ink cartridges from the printer and close the door.
• With the printer turned on, disconnect the power cord from the rear of the printer.
• Unplug the power cord from the wall outlet.
• Wait at least 60 seconds.
• Plug the power cord back into the wall outlet.
• Reconnect the power cord to the rear of the printer.
• Turn on the printer, if it does not automatically turn on. The printer might go through a warm-up period. The printer lights might flash, and the carriage might move.
• Wait until the warm-up period finishes and your printer is idle and silent before you proceed.
• Reinsert the ink cartridges, and then close the ink cartridge access door.
• If you receive a prompt to print a calibration page, do so.
• Try to print.
• If the issue persists, proceed to the next step

Step 2: Clean the print head(ignore this step if already performed)

• On 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 Clean Printhead, and then touch Continue.

  A test page prints.

• Check the print quality. If the quality is unacceptable, proceed to the 2nd level of cleaning.

  • Perform up to 3 levels of cleaning if the issue persists.

Step 3: Update the printer firmware

• Refer to this link to update the printer firmware.

Let me know if this information helps. 

Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.

Click the “Kudos, Thumbs Up" on the bottom right to say “Thanks” for helping.

[pfnc]

Thanks for the suggestions. I tried them all but black is still not printing.  Is there anything else I can try?

[atharva_gp]

@pfnc,

You can try manually cleaning the printhead.

Refer to this video for instructions.

Also, please check if you have followed all the troubleshooting steps, mentioned under this document.

Let me know if this helps.