|Usually one of few reasons. Either some jam like an old piece of paper is stuck in the paper path. May be hard to see and get at. |
May be some roller or bearing or gear is bad or worn or damaged.
Some shift in the way the paper is being held. Like the sides of the paper box have broken or the print module is not in correctly or such.
By looking at it closely you may be able to see. Get a very bright flashlight to see in the small spots or even a mirror on a stick deal.
Be sure you don't open it up with the power cord attached. Don't get your little fingers caught either.
"The era of big government is over," said Clinton 1996