Problem for Canon PowerShot S2 IS Digital Camera BLACK SCREEN

okay.. This week i got some serious problem with my friend S3 Powershot camera.. it has a blank LCD and Viewvinder..

so i googling up and find some answer for this problem.. finally.. its work and save me from wasting $100-$200 to repair my friend camera

here the help :

Can you not take pictures, or is it that a completely black image results if you do press the shutter button?

In the case where you get a black image, the following may be of help:

This is a common problem in older Canon S2 IS cameras, especially ones that have not been regularly used. What happens is that the lens iris gets stuck at a small aperture. Most often you can get function back. Here's how:

Turn the camera on in shooting mode.

Turn the mode selector to shutter priority ("Tv").

Use the four-way button on the back to set the shutter speed to 15 seconds. That's right, 15 seconds.

Press the shutter release. Count to seven, then pop open the battery compartment.

Wait several seconds, then close the battery compartment.

You may need to repeat the above sequence several times to unstick the iris. If that does not accomplish it, you will likely have to send the camera in for repair.

Once you have it working again, you should use the camera regularly to keep it from sticking again.

thx to welsberr