Thank you Rick,
I found the clean up package I bought along with the lense and clean them well. Guess what ? After cleaned well, it's working again.
Thanks to all your advice. It save me a lot of headache.

Thank you for the advice. I'll try to do that. Thanks a million.

How do I clean this lense, just for try to get the dirt out, if there is a dirt on it?
Could I use the air spray ( the one I bought to clean my PC desktop). Is this going to work?

This is AF-S lense and I kept the lense very clean and bought originally from Ebay ( warranty for 3 years) and just out of warranty?) and I think it's the lense.... I have no l other lense to try now and will figure it out, but I'm sure it's the lense.. I still can use manual focus but that's i tough, if and want to give to someone to take picture of me?

I had the D800 and this lense for 2 years. It always works great until now, suddenly the auto Focus did not work? Is this the lense or Main D800? I checked the auto Focus menu and it's still intact , the lense ring just don't roll when I push haft way ? but works if I manually focus the ring?
Any ideas where I should check? or where I can bring my camera for checking? Help....please

This tool is for coloring a old "Black & White" picture? Any advice to transfer a color picture to a sharp " Black & White " picture? Advice is much appreciated.

Actually, many site with $699 price tag, this is real, not gray market. The i-cart site is very good one. No doubt the Sony RX100 III is awesome, but I don't want a mistake, in the other hand I had a Nikon D800 as DSLR for any big trip.

My eyes are on Sony RX100 III with 20.1 mega pixels and I search for the best price and got $650 on one site. Is this any better pocket camera (good pictures , please) then this one with that price range? I do need good advice before commit to this one. Thank you