I finally decided to get a decent camera and decided to go with the Canon PowerShot S3 IS. It arrived today. The first thing I noticed after examining it and seeing that it looked great I noticed it sounded as if there was a loose screw in it, or maybe a loose spring moving around. I decided to dismiss it at the time and put in my charged 2500mAh NiMH batteries and 2GB SD card. It powered up fine. I snap a few pictures, previewed them, and deleted them. I went into some rooms with very little lighting and it made an sort of a grinding noise as it tried to auto focus. It continued to make those noises as I moved to other rooms and pointed the camera at other objects. Before I shut it off, or the last time it was trying to focus the image on the screen was very jittery/shaky as it attempted to focus. I turned it off and now it won't turn back on. No noise or anything. I also tried putting in the included alkaline batteries, but it still did nothing...nothing at all, as if I don't have any batteries in it. The battery door is fully latched. Am I missing something or is my camera dead?