HP Officejet Pro 7740

[RMSDesigns]

HP Officejet Pro 7740 prints only in grey scale and I only occasionally get colour from certain programs 

I have updated the printer settings but still happens 

[Garp_senchau]

@RMSDesigns , Welcome to HP Support Community,

Thank you for posting your query; I’m here to help by guiding you through steps to resolve this issue

Clean the printhead

• On the printer control panel, swipe down to open the dashboard, and then touch the Setup icon.
• Swipe up on the display, and then touch Printer Maintenance.
• Touch Clean Printhead, and then touch Continue.
• 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.

I recommend you follow these guides:

HP OfficeJet Pro 7720, 7730, 7740 Wide Format printers - Color or black ink not printing, other prin...

HP OfficeJet Pro 7740 Printers - Color or Black Ink is Not Printing | HP® Support

I hope these steps help resolve the issue

Please feel free to reply here if you have any questions or if you need further clarification on any of the steps. 

Take care and have a good day. 

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Regards,