Confirmed, D800 LF problem cannot be fixed.

You have just made liars out of all those who have had their D800's focus problems fixed, including me.

Ming Thein was perhaps the first to bring this problem to light and he had his fixed!

http://blog.mingthein.com/2012/07/04/nikon-d800e-focusing-update-problem-solved/

Here are a few others that stated theirs was fixed:

http://forums.dpreview.com/forums/read.asp?forum=1021&message=41956707

http://forums.dpreview.com/forums/read.asp?forum=1021&message=41970238

http://forums.dpreview.com/forums/read.asp?forum=1021&message=42051469

http://forums.dpreview.com/forums/read.asp?forum=1021&message=42051810

Perhaps, your D800 cannot be fixed. Or maybe, the repair technician cannot fix your D800. But, to make a bold statement that no D800 left focus problem ca be fixed is to fly in the face of those who's D800 have been fixed - again, including mine.