Hi, my name is ***** ***** it would be my pleasure to help with your issue today.
The only option that I'm aware of with the D800 and image review is in the playback menu. Here's how to get there.
Press MENU, click to the left and then up to select the top "[ > ] " (play) icon. You'll then see PLAYBACK MENU on the top of the color LCD
Scroll down through the selections until you see an option for image review. The default for this setting from Nikon is off. Turn it on and you should see your images when you take them. This is an effort by Nikon to save battery life by defaulting this option to off and it's really a mistake. A lot of people buy a DSLR camera having never used one and think something is wrong with it right out of the box because they're so used to using the viewing screen to take pictures with point and shoot cameras. That's usually not a problem with pro camera's like yours, but it is definitely for some models.
Hope this helps. Let me know if this option was already on in your camera or if there's anything else that I can do to assist you.
Please don't forget to rate my response and have a wonderful day.!!!
Brian, that's the only setting that I can think of that could affect this. I'm going to opt out of the question and give another expert a chance to weigh in and see if they have any other ideas. It doesn't make sense that dropping the camera could cause this after it's worked for so long, but anything's possible.