I resently bought a flat bed scanner ,the scanner runs off the usb port no other power supply, scanned a few photos put the d600 away for the night and the next morning the d600 would power on for about a minute then a blue screen with a bunch of writing  appears for about 1 second then it shuts down again, so i do not know if the scanner caused my problem or it was time for it to die? any ideas on why it might be shutting down on me ?