No Visible Image

If you place a graphic (File>Place) and nothing shows up except an empty box, it probably means that the preview was turned off in the original program. You'll have to fix this problem by opening your image in its original editing software. In Photoshop, for example, there's an option that's set in the Preferences (Command-K [PC: Control-K]) under the File Handling category in the top-left pop-up menu in the dialog. In the Image Previews pop-up menu, choose Ask When Saving or Always Save. Then resave the image in Photoshop, and relink your selected image in Illustrator by choosing Relink in the Links palette's flyout menu.