mine did this, I thought I would be in for a costly repair, I realized it was because i stored it with a battery and then it drained in the camera, even my other fully charged batteries would’t turn it back on. i took out the battery, feeling bad, didnt use it for about two months… then on a whim, I put a fully charged battery in it and it started up. moral of the story, dont let the batt discharge in the camera because it would cause errors, but by letting the residual current in the camera fully discharge over the time I didnt use it maybe reset something and it works like new again. I dont store it with a battery in it, anymore, I always remove batteries from my cam when putting it away.