Hello, and thank you for choosing JA for your support needs. Happy to assist you with this issue.
Has this issue ever happened before? The age of the Printer? Have you serviced the Drum and used the Corona Wire?
Ok. Each of the Color Cartridges in this printer has a little plastic shuttle that is used to clean the Corona Wire on each of these cartridges. Remove one and look at the narrow front of it and you will see a Tab that is a slightly different color or even the same color as the plastic of the Toner Cart.
Do you see it?
Ok, give me a few minutes to look at the photo. Also, can you send me more Pics of the Carts?