Canon EOS 1n Autofocus issue.............................

[mr.mike]

Hello,
Hoping someone can offer a suggestion on my Canon EOS 1n film camera. Seems everything other than autofocus is working. When I press the shutter button half way, the autofocus does nothing. The words One Shot don't appear on the LCD screen. Pressing the AF function and turning main dial does nothing either. I've tried different lenses and still no luck. The same lenses work fine on other camera bodies. Can't get the words Ones Shot or AI to appear on the LCD screen. Not sure what else I could try? Hoping someone has an idea. Looking forward to your suggestions.
Mike