SOLVED: "err" message on the display, the answer is not clear - Nikon D80 - iFixit
Nikon D80 Err Message how can i resolve - YouTube
Nikon D80 Err - Железо и софт - Не про работу - Форум об интернет-маркетинге
CW Services Ltd - Nikon D80 that displays 'Err' upon release ..... this is the fix - contacts on the 'phase switch' that tells the camera when it has completed a charge /