black ink not working but all other colors print

[CR-21]

It will not print black ink but all other colors work.  The cartridges are all separate colors on the 6520.

[sandytechy20]

@CR-21

Welcome to the HP support community.

I understand that the black cartridge is not printing, I am glad to assist you.

Did you make a copy and check if the black ink cartridge prints?

Did you check the black ink cartridge level?

Meanwhile:- 

Run a Print Quality Diagnostic report

1. Load plain white paper in the tray.

2. On the printer, touch Settings, touch Tools, and then touch Print Quality Report.

If you find any defect in the black cartridge block, follow these steps:-

Check the ink cartridge vents, Inspect the ink cartridges for clogged vents and for any remaining original packaging.

1. Open the ink cartridge access door.

   

2. Press the tab on the front of the ink cartridge to release it, and then pull it out of the slot.

   

3. Examine the vent area on the top of the ink cartridge.

   

4. If the vent is clogged, use a pin to gently remove excess adhesive from the vent.

5. 1. 

      Clogged vent

   2. Gently remove excess adhesive from the vent

   3. Unclogged vent

6. Make sure the orange pull tab is completely removed.

   

7. Insert the ink cartridge into its slot. Press down until it snaps into place.

8. Repeat these steps for any other ink cartridges with defects on the report.

9. After reinserting all the ink cartridges, run your finger along the top of the ink cartridges. If any are protruding, press down firmly until each ink cartridge snaps into place.

Refer to step 5 in this HP document for more assistance:- Click here

Let me know how it goes.

To thank me for my efforts to help you, please mark my post as an accepted solution so that it benefits several others.

Cheers.

[prbrunjes]

Hi that didn't work. It's a brand new black cartridge from HP and there is NO BLACK INK printing at all ! All other colors print fine.