Canon BJ-200ex manual Push the lock lever down until it locks into place

Avoid touching the yellow mounting base on which you place the cartridge--especially the circuit board on the side of the mounting base and the film cable that extends from the catridge holder.

6.Push the lock lever down until it locks into place.

§Use one hand only to set the cartridge in place and press the lock lever down

§Make sure there is no resistance when you press on the lock lever. The lever should lock easily into place.

§If you hear snapping noises or feel any resistance as you press down on the lever, remove the ink cartridge and try again.

7.Be sure no gap exists between the ink cartridge and cartridge holder.

§When secure, the ink cartridge makes contact with the circuit board inside the cartridge holder.