Well it was mentioned, multiple times. The op even stated they performed a reset prior to that suggestion. I guess not all enthusiasts are as clueless as some people appear to believe.
In fact, read the very last sentence of his original post.
The problem is we are not watching over someone shoulders when they "reset everything"
Does that mean they went through all the options individually and reset them?
or they used one of the reset options, or all the reset options? (did they know about the various reset options?)
Anytime you call tech support for anything they step through routines irrelevant if you have done them already.
If it works in Manual and not AUTO then we need to know the EXACT lighting, distance, subjects etc for the AUTO mode to guess WHY it selected a certain setup. We need more information than "it doesn't work" and "I've reset everything".
One could test the lenses on another body.
Of the body on other lenses to see if it could be the lenses or body.
Otherwise the "send it to Nikon" bells start ringing because they will "reset everything" and test it against known functioning equipment.