If it appears to start printing sucks up a sheet a little way and then stops red light on etc try the waste toner trick. I was plagued by this problem for ages then took out the waste toner container sucked out the dust with a vacuum cleaner stuck it back no more jams. It is less a jam than the thing just getting an error from the waste toner. The other thing could be the paper feed roller. There is a rubber on this that grips the paper and feeds it if it is worn then the paper wont feed. I flipped it over kind of turning it inside out to get a fresh smooth side that will grip and feed the paper. If you are a little dextrous then it isnt a difficult job. Had two of these and problems on paper feed with both. The toner is expensive the waste container at a tenner is a ridiculous price. Still the second one was bought as it was cheaper to get the whole printer with toner than a 4 colour toner pack, I use it for spares! email if you want to try the feed roller trick.