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HP Deskjet 3630 All in One
macOS 10.12 Sierra

printer has not been used recently and is now printing in black with occasional blanks.    Need to find how to clean printer heads but cannot find information.    HP HelpDesk pages only seem to go up to IOS Yosemite.

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Take a look at this HP support doc.

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HP Recommended

Take a look at this HP support doc.

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Please mark the post that solves your issue as "Accept as Solution".
I am a volunteer and do not work for HP.
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