I just put a new toner and drum unit in machine . It now puts a black line on the paper edge that comes out along back of copier and it comes and goes and it is fused . I tried to clean every where I could see and reach .

Question: What will happen if the narrator cleans the machine ?
Answer: The black line will go away .The narrator will need to replace the toner .The drum unit will need to be replaced .The drum unit will become fused .