I took pictures from my nikon d40x but all photos are displayed black in lcd. Would you know how to fix this error?

The D40x operates as SLRs have operated for half a century, offering you an optical viewfinder with which to frame and compose your picture. The LCD is for menus, shooting information, and reviewing.

Nikon introduced the live view feature, which allows you to hold your camera so it wobbles at arms' length, with the D3 and D300, released half a year after the D40x.

While almost all current DSLRs have this capability, it was not so common five years ago when the D40x was introduced.

The D40 works the same way SLRs have worked for the past half century. Only recently have dSLRs acquired a "Live-View" capability, where you see the image on the LCD monitor instead of through the viewfinder.

I realize this probably wasn't the answer you wanted to see, but that's the way it is.

Try removing the lens and re-fix it.. Some times the lens is not sensed properly if it is not fixed right.

The D40x is not capable of Liveview - i.e. looking at the LCD to take a picture. You are mistaken.
If you want Liveview, you need to buy the D3 or D300 cameras. The D40x is an entry-level camera.

Push ring circling OK button to up or down positions and LCR display will change showing info or image. 

i might predict an early sensor failure..

I think it's one or the other because the camera doesn't know what you want to color and what you don't want to color. Thats something more for Photoshop to do.

White balance settings may be changed. Go to the menu select WHITE BALANCE then select AUTO in it , then OK then return, now try.

conorp, not on a D40. This camera does not have the "Live View" capability.

I had the same error message, the camera is less then a year old, however, I was taking up to 800 pictires every weekend of my kids soccer games, then a 6 month trip to the Pursian Gulf, that is when it started, I got back home, took it right in, and one year later after a few visits and calls trying to find out where my camera was, I finally got an answer back, they said I needed a new shutter which will cost $300, They said I should just by a new body for $400. What Nikon does is set that error message to pop up at about 35000 shutter releases, and you can't do a thing about it, once they hooked my camera up to thier system the said I had over 36000 shutter releases, where the average person takes 10000 a year and they want you to replace the body every 3 years....so before buying any camera, always check out how many shutter releases you can get when you buy a camera

Rob Smith
Victoria, BC