I have a problem with my sony digital camera, it's fully charged and this problem only happenend about 2 times. I plug in the usb cord from the camera into the computer than i turn the camera on. Than it says USb mode, that it loads for like 25 sec than it the camera turns off. I wanna know why does it keep doing this, and the last time it happenend i didn't use it for like 2 months than it started working reguraly again. so can someone help me out.