>My D800 quit auto focusing about five days ago using a 50mm >f1.8D and 24-50mm f3.5-4.5D. After checking my focus settings >and mounting a 24-70 "G" series lens it began to >auto focus again. >Today (during a shoot) it failed to auto focus with a 16-35 >"G" lens. >I registered the camera with Nikon on May 7, 2013 so it should >still be under warranty...more later.
Sounds similar except your lasted much longer than mine.
My first lens to fail was an older 70-200 2.8D lens; it failed one week before my others. Then each lens I tried started to fail.
Nikon initially requested I take photos and send them showing the problem,. There response was "You need to take the photos in AF mode". My response was "I did".