Printer Only Prints Magenta

[deergirl]

Hello, I have an HP OfficeJet Pro 6978 and it has an array of issues
About a month ago it started not printing black, so I adjusted all my documents to be slightly colored and it worked fine for about a day until it started printing in patches, and in streaks. You could no longer make out the images
I tried aligning the printhead several times, turning it off and on, cleaning the printhead, restoring factory settings, changing all ink cartridges to brand new ones along with cleaning everything I was able to
I turned off the printer for a couple weeks and today when I turned it on it no longer prints in patches or streaks, but it prints everything in only magenta. 
Again, all cartridges are full and not defective, everything is clean and aligned, and the printer is up to date on maintenance
Side note: I can't fully align the printer anymore because since the second step is to scan the sheet that prints, the sheet only prints the couple words in magenta so it doesn't recognize a sheet to scan 

[TEJ1602]

@deergirl, Welcome to HP Support Community!

If you have already performed the steps from the document Black or Color Ink Not Printing, Other Print Quality Issues and the issue persists, it could be a hardware failure.

Please reach out to the HP Support in your region regarding the service options for your printer.

Hope this helps!

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