There are arrows on the wheels that turn to choose the letter to print. It looks like one wheel, but it’s actually 2, a top and a bottom. Two arrows are on the side of the wheel by the scissor icon (top wheel). If you spin the bottom wheel separately, you’ll see another two arrows on it. Line the two sets of arrows up, and it will work again. You might have to work at getting the “ribbon” to feed, but once you get it to, you’re back in business.