Historical V11 reference. Use the current guide and exact unit; stop if different.
[Silent video; no spoken words or sound.]
[On-screen message: "No ink cartridge is detected."]
[Silent demonstration: the cartridge is removed, inspected and reinstalled.]
[On-screen annotations indicate the cartridge-slot top buckle and compare its position.]
[Silent close-up of the cartridge contacts and contact area.]
[On-screen text: "Clean the contactor."]
[Silent cartridge-care warning graphics.]