Welcome to Justanswer.com, my name is Dustin.I'm sorry to hear about the issue you are having, I will do my best to help you resolve it.
Lets try cleaning the color cartridge contacts first, http://h20565.www2.hp.com/hpsc/doc/public/display?docId=emr_na-bpa02060
If that doesnt fix the issue, then lets follow steps 4 and 5 on this page, to use a tool to align, and then use a tool to clean the printer. http://h20564.www2.hp.com/hpsc/doc/public/display?docId=c03275793
Once you have had a chance to try those repairs, let me know if you notice any improvement in printing.
I strive to provide great service, and greatly appreciate a 5 star rating clicked and submitted when you are satisfied.. I always answer follow up questions.Dustin S.Senior Technician and Network Switching Systems Operator / Maintainer.