Right now, when I press the power button, the camera isn't turning on. Is it the battery? I just borrowed this from a friend, I don't have any instructions, and the friend's out of town------ is the battery beside the memory stick at the base of the camera? It looks like there are screws there, do you need to unscrew them to charge the battery, or is there another way of releasing it if this even is the battery? I was wondering if there is a way of locking the camera, is that why it won't turn on?