Officejet pro 7740 only print in grey scale. Also the test page, the color levels are in grey scale

[Kris96]

HP Officejet pro 7740 is not printing in color anymore. On the test page, the color levels are printed but in grey scale. When I make a color copy, everything is printed but in grey scale. The ink cartridges are the original from HP and are full. What can I do to fix this problem?

[sandytechy20]

@Kris96

Welcome to the HP support community.

I understand that your printer is not printing in color, I am glad to assist you.

Clean the printhead

1. On the printer control panel, swipe down to open the Dashboard, and then touch the Setup icon .

2. Swipe up on the display, and then touch Printer Maintenance.

3. Touch Clean Printhead, and then touch Continue.

4. Examine the test page.

   • If the print quality is unacceptable, touch Clean Again to continue the next level of cleaning. Repeat these steps for the third cleaning stage, if necessary.

     NOTE: 

     If the printhead is badly clogged, it might require another cleaning cycle. If so, wait 30 minutes before you perform all three levels of cleaning again.

   • If the print quality is acceptable, touch Done.

Refer to this HP document for further assistance:- Click here

Keep me posted.

To thank me for my efforts to help you, please mark my post as an accepted solution so that it benefits several others.

Cheers.

[Kris96]

Maintenance of the printer doesn't help. I did it several times. The printer is printing good and clean but everything in Grey scale. All the color levels on the test page are printed in Grey scale. I think it is some fault in the software??

[sandytechy20]

@Kris96

If it copies and prints test pages in grayscale, this must be an issue with the cartridge.

I am sending you a private message with the steps to talk to HP support.

Please check the mailbox icon at the top-right corner of this screen.

I hope this helps resolve this issue completely.

 If this helps, please mark the public post as an accepted solution so that it benefits several others.

Cheers.