Just received my D600 back from Nikon. Great turn around time, new shutter, etc. However, the camera does not take pictures except in A or S mode where the adj. wheels do nothing. Nor can the single point focus be changed, or the flash activated, or a picture taken in Auto mode and auto focus doesn't work at all. It all worked previously. I have two other high end Nikon DSLR's that work perfect and 40 years of other high end Nikons that worked perfect. D600 is Junk, service Junk. Time to switch brands.