(The Following printhead has a problem) Blackyellow K/Y)

I have an HP Officejet Pro L7780 All-in-One. Recently it does not work due to a printhead error (The Following printhead has a problem) Blackyellow K/Y) we did buy new original HP printhead Blackyellow K/Y and replaced but the error message still shows.
Please help. Many thanks.

Hello @VC15,
Welcome to the HP Support Forums!
I understand that you're getting the error "The following Printhead has a problem: K&Y" on the front panel of your HP Officejet Pro L7780 All-in-One Printer. I would like to assist you today with resolving this Printhead error. Because the error remains since installing a new Black and Yellow Printhead, there is the likelihood that the Printhead contacts are dirty, or there is a hardware defective with the Black and Yellow Printhead compartment. Please follow the steps below to resolve this Printhead error.
To start troubleshooting can I please have you click here. Once the support document opens please run through Step one, and Step two. Should the error message persist, than a replacement printer would be needed to correct the hardware failure.
Please respond to this post with the result of your troubleshooting. Good luck!
X-23
I work on behalf of HP
Please click "Accept as Solution" if you feel my post solved your issue, it will help others find the solution.
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Welcome to the HP Support Forums!
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Please click "Accept as Solution" if you feel my post solved your issue, it will help others find the solution.
Click the "Kudos, Thumbs Up" on the right to say "Thanks" for helping!

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(The Following printhead has a problem) Blackyellow K/Y)

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