Try doing a hard reset. I've had to do this to my HP laptop a couple of times because my computer screen was blank and no matter how many times I try to turn it on it wouldn't work. I also thought my laptop's battery wasn't charging but that wasn't the case.
What you need to do is:
1) Turn your laptop off. 2) Take out the battery. 3) Unplug the charger from your computer. 4) Hold down the power button for 30 seconds. 5) Put the battery back in. 6) Power on the laptop.