D2x shutter isn't firing. What are the causes?

This sounds like a failing shutter. Even though the shutter is rated for some 200K actuations, your D2x may have begun to fail even if you haven't come close to that number of pictures yet. Many times, the problem you describe comes with the code "Err" displayed on the bottom in the viewfinder.

Make sure your lens is firmly and securely attached to the body. You'll need to be in focus to make an exposure if in auto focus mode - so switch to manual and see if the shutter releases. Try a different lens to see if it is a problem with just one or all.

it is important to note that Nikon does not warranty the number of actuations - only time since original purchase. You're not entitled to a free repair if you're out of warranty. They may give you a free or reduced repair based on how long you have been out of warranty (assuming you are) - but you should not expect this. Of course, you can haggle with them to get whatever deal you want.

You can arrange for Nikon Factory Service in NY or CA by clicking here.

I hope this helps and good luck! Please rate my reply. Thanks.

Hiit is depend on what causes. Like your problem it relate with several cause. would you give more detail? Like back of menu function, top of lcd display function (every button does it change).