My Asus laptop won't turn on

My asus laptop has a built in battery and suddenly while I was using it it turned off and goes back up then it turned off and then it wont go back up. I tried charging it but it wont charge. I press the on button for 30 secs it goes back up and turn off again. i dont know what to do, i had my laptop for only 5 months. HELP I NEED TO EDIT VIDEOS FOR MY FINALS PLEASE!!!