hi there in reply to your question.
i plug the usb cable in to my laptop and it makes a noise from my pc i presume to acknowledge connection.
if i press print, it brings everything up as normal ie the print page saying how many copies etc and then a message ccomes up from lexmark saying that it is printing but then it only gets to say this time 31% printing and then seems to stop, it has got as far before as saying 99% printing but still nothing comes off.
it is a lexmark x4550 model.
thanks
layler