Hi. I bought a new 350 ml cartriges set for my 9890 in order to replace the old 700 ml. The LK cartrige doesn’t lock. It is quite strange because the “old” 700 ml worked perfectly and it seems the 2 cartriges look the same. I made a short video to explain. https://bit.ly/3QJ5EEz
Is there someone who has experienced a similar issue, please? I’d truly be grateful. Many thanks.