On a laptop, the lights, and the color of the lights, are usually indicators of battery and power. It would depend on the brand and model, but if it is anything like mine, it sounds like the battery has no charge and the power adapter isn't working. If she threw it, she likely jarred it pretty good, and it's easy to knock the power jack lose. I assume it was on when she threw it, so it's a toss up if the hard drive is damaged or not. You could look for a used laptop someone is selling online cheap that has symptoms of a bad hard drive and swap the two drives. It might work...