Hi there. I work as an IT-Supporter. Mainly fixing laptops. One of the first things i try when i get a laptop that wont respond when the power button is pressed, is to take out the battery and discharge the laptop by holding down the power button for 10 seconds. When i explained to the student what i did to make it work again, she asked why that worked and why it happened in the first place. Couldn't answer that. Does any of you guys know?