Dell 3100cn Print Problem

Here's a scan of the problem

http://en.community.dell.com/resized-image.ashx/__size/500x400/__key/CommunityServer.Components.PostAttachments/00.19.61.33.45/Dell-3100cn.jpg

Printer is 4 years old and the problem just started out of the blue. Prints about 600 pages a month. Changed out the toner and ink while I had some. After talking to Dell support on the phone he suggested replacing the fuser. But the problem didn't go away. Any help would be appreciated.