I have the same problem. At first, it was probably just the worn out rubber roller band. After loading too much paper it jammed and stuck tight. A hard pull on the paper got it out but still no sheet would get pulled
through. Used the 7 steps posting to remove the motor which exposed the gears and broken teeth on the roller shaft gear. I suppose the hard pull out on the paper did the damage. Now I need to find out how to get that assembly out for a possible repair or replacement.