My HP Laptop won't start!!

Hello, I was in school today using my laptop and it was working perfectly. But when I got home, it didn't turn on at all... I tried hard rebooting for hours and it still wouldn't work... I've tried numerous things but it still doesn't turn on!!! When its on charge, the orange light is on and when I try to turn the laptop on, it goes white for a few seconds then goes back to orange! Please help, I have so much stuff on there to do with school and my youtube channel!!!