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Note for common printer problems
Customers receiving the"will damage your computer" message along with others like "unable to access cups/tmp" or "'@%' cannot be opened" need to update their version of the macOS. Please check this article for more information: "HPxxxxx.framework" will damage your computer" message in macOS Catalina or Mojave .
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Solved!

My OfficeJet Pro 8020 will not go into sleep mode

HP Recommended
HP OfficeJet Pro 8020 series
Microsoft Windows 10 (32-bit)

When I put my phone line the back for the fax the printer will no longer go into sleep mode. If I unhook the line then it will.

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@SunshineSkier, Welcome to the HP Support Community!

 

On the printer screen, go to Setup > Preferences > Sleep mode > Set it to after 15mins.

If the issue persists, this could be an issue with the phone line as this issue occurs only when the phone line is connected.

 

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! 

KUMAR0307
I am an HP Employee

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The "after 15 minutes" worked! Thank you!

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