Sounds like a call to Dell is in order. Chances are the LCD or its connector have failed.
One category of equipment that has started appearing with depressing regularity in our local dumpsters is all-in-one printers -- they are too complicated and they are built down to a price. And when one function goes they are more expensive to fix than to replace.
Thank you, Fihart !! That's what I thought, too. What copier/printers do you recommend currently?