All printheads are brand new (1 month old), HP models bought from Amazon.com
Cartridges too, except 2.
Machine has been totally overhauled by HP maintenance in october. New printing cart, new motherboard, new many other things.
Printing test after overhaul were perfect.
So what gives
I downloaded new raster (oct 2014) which has a deactivation feature for expiration control.
Now this is solved.
I made a printing test from Printer Utility, testing printheads and colours : perfect, not a single error.
What is not solved is the ICC profile matter. I use HP Semi Gloss Contract paper which profile was perfectly recognized 1 month ago.
Now printing job remains indefinitely stuck. So I checked list of profiles from Print Utility. It says this profile for HP Semi Gloss Contract paper is obsolete !!!
It's selected on printer screen command under the "Paper" item.
So I tried to download a "new" ICC profile for it from printer utility. It says access to the HP server is impossible.
Nightmare…