Read page 211 as well, at: http://www.nikonusa.com/pdf/manuals/noprint/D7000_ENnoprint.pdfThere is a reboot function as well, that trick I had to engage with my D3S on the first outing.Last suggestion, are the lens contacts in need of a light cleaning?IF you have done all of the above, then a call to tech support is in order.Good luck,Rob
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