This might be a long shot, but on the lens section of the guide shown below, it notes ,,,,
Non-
G lenses will have an aperture ring on the base of the lens where it's attached to the camera. Set this this ring to the smallest aperture (largest number), usually in orange and 16, 22 or 32. There usually is a lock to keep this ring set there, since if it comes off that setting you'll get an error message (fEE) from most cameras.
Full guide is here:
http://www.kenrockwell.com/nikon/d90/users-guide/index.htm
Hope this helps
×