My laptop wont turn on

Hello,
my laptop is not turning on.at first it was working totally fine and today i installed ubuntu in it and then i enabled grub which was actually not enabled and after enabling the windows 10 loader i restarted my laptop and while shutting down it came of with a flash like old telivisions turned off. and now it is not starting up when i plug in the charger it does not show the light that indicates that whether the laptop is being charged or not. i tried plugging out the battery and battery was fully charged when it went off. i am in big trouble here there are my project in the Hard disk soplease tell me what i need to do i need help :(