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- HP Community
- Printers
- Printing Errors or Lights & Stuck Print Jobs
- HP Officejet Pro 8720 won't recognize it, therefore won't le...

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09-18-2019 09:49 AM
09-20-2019 04:16 PM
Welcome to HP support community.
Remove and reinsert the ink cartridges
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Open the door to access to the ink cartridges.
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Wait until the carriage stops moving before you continue.
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Push the ink cartridge to remove it, and then push it into its slot until it snaps into place.
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Repeat these steps for the other three ink cartridges.
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Close the ink cartridge access door.
Update the printer firmware
Refer this HP support document for more assistance:-Click here
Let me know how it goes.
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Cheers.
Sandytechy20
I am an HP Employee