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- HP Community
- Printers
- Printer Ink Cartridges & Print Quality
- OfficeJet Pro 6978 printing streaks of pink where dark blue ...

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Check some of the most frequent questions about Instant Ink: HP INSTANT INK, HP+ PLANS: INK AND TONER.
Check out our Black or Color Ink Not Printing, Other Print Quality Issues info about: Print quality and Cartridge Issues.
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06-22-2021 09:34 AM
I recommend you to contact the HP Support Team regarding this as this could be a hardware issue.
Link: www.hp.com/contacthp/
Note: Select the country accordingly to get the contact details for support.
Let me know if this helps.
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Have a great day!
I am an HP Employee
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