Hello and thank you for your question. I look forward to assisting you today. Do you see an error number as well?
Hello there and welcome to Just Answer. My name is ***** ***** I will be assisting you today. I am an engineer with over 30 years photographic training, repair and troubleshooting experience. I will try and answer your question accurately and precisely so that we can get you on your way.Just to confirm, this is a Nikon D80. Correct?
Please reply and we can continue.Steve
Ok, do you have another lens? If so, try that and see if the error remains. If you only have one lens, remove it, clean the contacts with a soft cloth and some rubbing alcohol or Windex - on the lens and the camera body, and try again.
Let me know.