Printer printing blank pages or faded pages

[fi2363]

I have just put new ink cartridges in my printer and since then I have tried to print documents and they either print out blank or extremely faded. 

I have tried the following 

- turned printer on and off 
- taken ink out, shake it, put it back in 
- printed test pages and they are ALL ok 
- uninstalled printer software on Macbook and reinstalled 


Any ideas? Thanks so much! 

[Valsimot]

Can you take a better look on a test page that is printed OK as you stated? Is black on test page really black or more brown/grey?

The printer mix colour ink to produce something close to black, but it's not black.

[fi2363]

Hi there. Thanks for reply. 

I have printed off a few test pages / printer quality pages. 

- one of them has 6 boxes at the top (orange, green, purple, yellow, pink, blue) and the rest of the page is blank. 
- one of them has a few coloured thin vertical lines, then across the middle of the page lines of thick block colours (blue, pink, yellow x2)
- another page i printed has lots of tiny little faded blue boxes and at the bottom of the page in red it has a warning sign with IMPORTANT!! and an arrow

[Valsimot]

No black, your printhead failed, if cleaning isn't helpful it's probably time for a new printer.