Printer not printing properly in colour

[Nic_123]

My printer has gradually ceased to print properly in colour. When it first started I would run a printer maintenance programme through the set up and it would come right but require repetition of this exercise a couple of times a week. Now it is not printing any blue colours. All my colour copies are therefore printing in greys, blacks and shades of pink and yellow. Any suggestions please? Thank you.

[Rene2014]

My HP OfficeJetPro 6978 all in one series, model T0F29A has the same problem. I have done all the diagnostics, cleaning levels, and print from flatbed, and still no blue. I have replaced the cyan cartridge, as well. Does anyone have helpful suggestions?

[Nic_123]

It would be really helpful to know if it is a toner or cartridge problem or if the printer has to just be replaced. I resent the idea of disposing of an otherwise functional printer but it has to be able to print in colour! Thanks for any tips offered.

[Rene2014]

Yes, I would like to know that, too, Nic. Still waiting for someone from HP to weigh in on what to do next.  Shipping an out-of-warranty printer for repair probably costs as much as buying a new printer. I miss on-site servicing.