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Common problems HP Solution Center not working : Adobe Flash Player Error and Unable to scan
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Cleaning internal side of HP Officejet Pro 7720 scanner glass

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HP Officejet Pro 7720

Internal side of glass is dirty 

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@plr99, Welcome to the HP Support Community!


The internal side of the scanner glass is not accessible. The glass can only be cleaned from the top.


You may refer to the steps mentioned in this document to clean the glass - Resolving Copy Problems


Hope this helps! Keep me posted. 


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 bottom right to say “Thanks” for helping!

Have a great day! 

I am an HP Employee

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