I also had the same issue and i called service. They sent two service personnel and fixed it. You can do the same.
Regards.
Shane.
So i bought this printer today which was sold as working fine. but after getting home have tried printing and the blue ink seems to be hvaing issues, it shows the ink as full on all inks. Theres also an issue when i print with black i have attached pictures and hopefully someone can help me resolve the issues