I'm having a problem with my Powershot A590. The camera appears locked with the lens extended. Now I can't open the battery compartment to replace the batteries. Normally, to open the compartment you slide the battery compartment lever on the cap forward and then slightly to the left as the arrow indicates but the battery container will not move left. I'm stuck with a camera with the lens fully extended but no lights or indication of power at all. No images can be seen on the view finder, no illumination at all. How can I get the battery container open to replace the batteries without breaking the camera?