I own a Samsung NP300E5X, it was working like a charm till y'day night. Battery was low when i last worked on it. Morning, I try to power on the laptop and it does not power up. I put AC mains to charge, still does not power up. I remove battery and put AC mains, still no joy. Can anyone help me out as to how to get it working again. On putting battery and/or ac mains, a green LED (which has (+-) on it glows green.