LCD black in shooting mode only

My Canon A610 just had the same thing happen too! I e-mailed Canon support and they "offered" a refurbished different model for $100. Otherwise they told me to send it to them, they'll give me an estimate of what the repairs will cost. Cost??? This is Canon's issue, Their problem! MY cost should be $0.00!! I've been a Canon customer for years! I'm buying a Nikon!

I know this is very old post, but this may help others with a similar 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, 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 the following for further info and a simple fix that may help:
http://camerarepair.blogspot.com/2009/05/simple-fix-for-stuck-shutter.html

Defective CCD. Just happened with our A610 as well. Oddly enough just had our Canon ZR85 camcorder repaired about 1 month ago (for free) due to this same problem. Sounds like Canon isn't as forthcoming with the A610 tho. We called today and they said $100+ to repair or replace, but the following link seem to indicate that if you're persistent you can get them to fix for free. Now the battle begins ...

http://forums.cnet.com/5208-7593_102-0.html?forumID=58&threadID=243034&start=0