Lens cover My lens cover will not close. I have put in new batteries. the camera will turn on and off with no problem but the lens cover stays open.

I know this is an old post, but for those who want to fix it themselves: try blowing lots of compressed air around the open lens shutter to clean the mechanism. Or use a hair dryer for a few seconds (don't want to heat up the camera). Also with the lens barrel extended and pointed downward, tap the lens barrel with a pencil while you extend and retract the lens by powering the camera on and off. A grain of sand in the mechanism is usually the culprit, and you want to try to dislodge it.

You can open it up, but only as a very last resort. The above procedures usually work if you try them enough. But for those particularly nasty stuck mechanisms, here's an example repair on a Canon Powershot A400 (do this at your own risk):

http://camerarepair.blogspot.com/2007/11/repair-of-stuck-lens-covers.html

I have the Casio EX-750 and basically had the same problem. The lens cover was stuck inside and I had to find a way to get it back out. Even when I turned it on the lens stayed opened. I needed something thin enough to shimmy between the lens cover and the opening, and thought of a post-it and it's sticky end. I played with it a bit and once I got it partly out I was able to grab the cover with a pencil eraser and coax it closed. When it was closed I noticed that there was residue probably from fingers touching it. I took a cotton swab and dipped it into some rubbing alcohol and proceeded to clean the surface of the lens cover, turning it on & off, opening & closing the lens cover. That did the trick and now the lens cover opens & closes like new. Caution: Make sure that the cotton swab is not dripping of alcohol and is only damp.

Send the camera into repairs. There is nothing that you can do yourself that would fix this.