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Note for common printer problems
Customers receiving the"will damage your computer" message along with others like "unable to access cups/tmp" or "'@%' cannot be opened" need to update their version of the macOS. Please check this article for more information: "HPxxxxx.framework" will damage your computer" message in macOS Catalina or Mojave .
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Cyan Not Printing on 6978

HP Recommended

Having the same issue of blue/cyan no longer printing in any capacity-  copies, from inbox, from files, from anywhere.  Purchased multiple new cartridges trying to fix, waste of $ I can't get back.  When I ran through the 'fixes' with the help line associate I had already tried, all the same ones suggested on this forum, it then become a hardware issue that due to me not purchasing the extended warranty, there was no help available.  Hard to complete presentations without blue ink.  Very frustrating.  I would hope extended warranty or no extended warranty HP's printers would last longer than 2 years.  

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@JennSyd

 

Welcome to the HP support community.

 

Make sure the ink cartridges are properly vented and seated correctly

 

  1. Turn on the printer, if it is not already turned on.

  2. Open the ink cartridge access door.

    The carriage moves to the center of the printer.

    Open the cartridge access door

  3. Wait until the carriage stops moving before you continue.

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

    Pushing the ink cartridge inward and then pulling up to remove it

  5. Examine the vent area above the HP logo on the top of the ink cartridge.

    Image: Examine the vent area on the top of the cartridge

  6. If the ink cartridge still has the orange pull-tab attached, pull to remove it.

    Image: Remove the orange pull-tab

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

    1.  

      Clogged vent
    2. With a straight pin, gently remove excess adhesive from the vent

    3. Unclogged vent

  8. Turn the ink cartridge so that the ink cartridge contacts face downward, and then match the label color with the color dot on the carriage.

  9. Slide the ink cartridge into its slot, and then gently press the ink cartridge down until it snaps into place.

    Reinserting the ink cartridge

  10. Repeat these steps to inspect the vents on each of the ink cartridges.

  11. Make sure each ink cartridge is firmly installed in its slot. Run your finger along the top of the ink cartridges to feel for any that are protruding, and if any are, press down firmly until each ink cartridge snaps into place.

  12. Close the ink cartridge access door.

    Closing the ink cartridge access door

You can refer this HP document for more assistance:- Click here

 

I hope that helps.

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

Cheers.

Sandytechy20
I am an HP Employee

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