Why won't my computer turn on at all?

My sister dropped it but it has no scratches at all, and it was still functioning for a few hours. After those few hours the computer did not turn on at all. Nothin functioning hat I could hear, and whenever I plugged it in the colors on the charger went from green to orange to green every once in a while. None of the startups help because it literally doesn't turn on at all. Please help.