Recently, a camera with lens attached got knocked off a chair and hit the floor (not my gear, fortunately!). Following that, the lens would not focus properly, either with manual focus or auto. The manual focus just couldn't get quite right, and the autofocus wouldn't work at all. The zoom still works.
The camera is the Nikon D40, and the lens is the 18-55mm included with the D40. The lens has the focus mechanism at the front end, and the lens did hit the floor. I'm inclined to think the hard impact may have fouled up the lens focus mechanism.
Is it possible or even likely that the lens is damaged?