Hello. Thank you for coming to JustAnswer.
Sorry for the delay and thank you for your patience. My name is Michael. I will be helping you with your question today. I am an Expert in the Camera and Video category. If you feel this is not the best category for your question, let me know and I will forward it to the appropriate group of Experts.
Please let me know if there as any additional information that you think might be pertinent to your question. If I don't hear back from you, I'll provide the best answer I can based on the information you've given so far. You will still be able to reply with additional information or questions at any point during our conversation, and I'll revise the my answer accordingly.
Chances are that it is the battery or batteries that have failed. Even when not in the camera, they will discharge. If they discharge too far, they will not charge again. Once they drop below a certain capacity, they are no longer recognized. The best option is to replace them. On devices that can be charged from USB, you can sometimes connect them to a low current "dumb" source like a USB port which is only 500ma, let it trickle charge for several hours, and then try again. In this case, it would be easier to just replace them.
I should mention also that this camera is notorious for its ability.to chew through batteries. You won't get as much time as you would expect on a set.of batteries. But of course, it should be enough to be usable.