After trying opening the battery slot [without touching the battery] and closing it, the NDS now turns off occasionaly. I also noticed it that when i tilt the NDS 45-90 degrees, the battery light from green turns to red, when I realign it again, it goes green again. The random turn-off occurs even when it's the power cord is plugged in. I trying fastening the screws even harder, but the random turn-off occurs again. Any ideas?