hi i bought a sony camera which now doesnt register on my computer when i connect it. i dont think the usb cable is dodgy because the camera behaves as though it has been plugged in. i have a mac, and previously i photo would open up and i could then upload the photos from the camera to the computer. now nothing happens. its not the usb port as it doesnt work on any of them, and its not image capture because that is set to i photo, it just says no device connected, can anyone help please- leave me a message that would be amazing!