When taking a photo the lcd screen isnt showing pictures but when in review you can see the pictures on the screen

reset settings to factory default

Turn the camera on. Press the display button (second button down right next to the LCD (Labeled LCD/info) to turn on the LCD. Make sure you are not in review mode. Here is a link I am sure you will find helpful (its what I used to solve this problem)
http://www.kodak.com/global/en/service/publications/urg00714toc.jhtml
Let me know if this works
Cheers
Jer

i was taking picturres with my canon A470 digital camera and when i review the pictures that i take, the pics were very bright that you cant view well the pics. what is the problem with it? it just suddenly happened like this.

check eye settting or its a fungus inside lens black screen is due to virus

Try cycling through the Display button until you're able to view photo to be taken.

The more professional models of the Canon Rebel are designed to by used by looking through the viewfinder and not at the screen. The screen is for reviewing pictures and setting information.

1) Try pressing the DISP button
2) If this does not work, this signals the machine is in need of service.

The D70S is a SLR (single lens reflex). You cannot use the LCD for taking pictures like the small compact digital cameras. There is no way for the CCD sensor to have any image prior to taking since it is behind the mirror and the shutter is closed.

Your camera works just like a film camera SLR,. You use the eyepiece to frame and focus your picture. The LCD screen is for reviewing pictures taken or menu operations. You cannot preview a shot on screen before it is taken with the camera.

Have you tried the 'Menu' button? If you've turned off the 'Review' feature in the settings menu, your LCD screen won't show anything unless the 'Menu' button is pressed. If it doesn't come on when you push 'Menu' with a charged battery installed, your camera will need to be serviced.