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- HP Community
- Printers
- Printing Errors or Lights & Stuck Print Jobs
- Re: Printer problem

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06-17-2019 01:42 PM
The printer has stopped printing in black ink Tried cleaning printhead numerous times. Could not do alignment. Changed print cartridge. Also didn't help. The Printer is a HP inkjet Pro 6878.
06-19-2019 02:12 PM
Hi! @jps5,
Are you using an HP genuine ink cartridge?
Have you tried checking with a different ink cartridge?
Replace any empty, low or faulty ink cartridges on the printer. Also, try cleaning the ink cartridge contacts and check if it helps.
Print a Print Quality Diagnostic Page, and then evaluate the results.
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Load plain white paper in the input tray.
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From the printer control panel, open the Setup
menu. -
Open the Reports or Tools menu.
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Touch Print Quality Report.
A Print Quality Diagnostic Page prints.

Refer this article to know more information about colour or black ink not printing issues. Click Here
Let me know if this helps!
Have a beautiful day ahead! 🙂
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A4Apollo
I am an HP Employee
06-20-2019 01:29 PM
Hi! @jps5,
Thanks for the update.
If you have tried all the steps suggested, it certainly sounds like a hardware issue with the printer.
Please contact support for the service options.
Contact HP support using this link. Click Here
Take Care!
A4Apollo
I am an HP Employee