Sounds like there's blockage between rollers and it also jams the sensor so auto function stops working. You will need to clear out as much jammed paper as you can using tweezers. Inspect the centre of the feed opening, there should be sensor which must be clear of blockages and moving freely. So clear any stuck paper with tweezers, in addition you can soak any jammed paper with WD-40 and unit should be good as new. Although if sensor arm is damaged then replacement of such sensor is unavoidable.