I have a Cannon PowerShot S2 IS digital camera, about 5 years old. The LCD Monitor and Viewfinder both only show a black screen with some of the Dispay Icons across the top and bottom, and after a few seconds it sometimes changes to just the waving hand icon at the bottom. I will display previously taken photos. I've tried taking a photo but all that displays is a black screen when I try to view that photo. The lens cap is off. I've tried changing some of the settings, and resetting to the default settings. I've also change batteries and changing the Memory Card. The user guide didn't give me any useful info to correct the problem.

A stuck shutter is another common failure mode for digital cameras. The symptoms of a stuck or "sticky" shutter are very similar to CCD image sensor failure. The camera may take black pictures (for shutter stuck closed), or the pictures may be very bright and overexposed, sometimes with lines, especially when taken outdoors (for shutter stuck open). To confirm a stuck shutter, put the camera in any mode other than "Auto", and turn the flash OFF (you don't want to blind yourself for the next step). Next look down the lens and take a picture. You should see a tiny flicker in the center of the lens as the shutter opens and closes. If no movement is seen, then you likely have a stuck shutter. If so, please see this link for further info and a simple fix that may help.