@paulw75
Welcome to the HP support community.
Update the printer firmware
Here are the steps:- Click here
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.
You can refer this HP document for more assistance:- Click here
I hope that helps.
To thank me for my efforts to help you, please mark my post as an accepted solution so that it benefits several others.
Cheers.
Sandytechy20
I am an HP Employee