Re: Printer prints test pages in color, but all other are in Grey scale

, Welcome to the HP Support Community!

This is a printer driver compatibility issue with Win 10 PC. Let us try these steps to resolve this issue:

Install the printer driver compatible with Win 7 on your Win 10 PC.

Clean reinstallation of Pre-installed HP drivers

1.  In Windows, search for and open Programs and features 
2.  Select your HP Printer 
3.  Select Uninstall 
4.  In Windows, search for and open Devices and printers 
5.  In the Devices and Printers windows look for your HP printer. If you see it listed right-click on it and choose ‘Delete’ or ‘Remove Device’ 
6.  Open up the run command with the “Windows key + R” key combo. 
7.  Type printui.exe /s and click Ok. (Note: there is a space in between “printui.exe” and “/s”) 
8.  Click on the “Drivers” tab 
9.  Look for HP Printer driver. If you see it Click on it and click Remove at the bottom 
10.  Select Ok 
11.  Select Apply and Ok on the Print Server Properties windows 
12.  Close Devices and Printers, restart the computer.

Click here to download the HP Full-featured driver.

Once downloaded, make sure to run the file to start the installation and follow the on-screen instructions.

Try printing.

Let me know how this goes.

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