It worked fine for awhile, then it started only uploading 1/2 the pictures, some I would get error messages on and they would be lost, and now it wont do anything. It connects via USB.When I plug it in to any of the USB ports on my computer, the camera turns on, so I know it's detecting SOMETHING, but nothing appears, not even the error dialog box that used to come up and say it is not detected or something along those lines....NOTHING!Sony Cybershot DSC-S90