I am having issued with my d600 where it will spontaneously shut off while in use. I dont have the batter in it because they no longer hold a charge. When i have either of my batteries in the batter light just blinks red. And when I remove the batter it goes away. However, recently I have been having a problem where, the thing will just shut off on me. I am concerned because I know this is terrible for any pc and is likely destroying my HD. It is happening far to frequently.