Is there a wall outlet power cord that came with the camera? If you plug it in, does it work?
I've had this happen but each time it was because I was using AA batteries for power and one or more were turned the wrong way - but this sounds like it may be a different problem. Still, the test above will tell us if its the battery or the camera that is failing.
Steve Crow
Crow Digital Media
http://www.CrowDigitalMedia.com