My sister is out of town and left her laptop here. So I decided to take advantage and use it.But, while I was watching a t.v. show online (on hulu), it randomly shut off.So, I just thought it was out of battery so i put in the charger and the flashing light that indicates it's charging went on. But, when I tried pressing the power button, the laptop won't turn on! Should I wait an hour, until it charges?? Please help!!!! I don't want to get in trouble for breaking her laptop!