Are you sure it isn't on? If there are any internal sounds or external lights, then it may be on and the display just isn't showing. So I would start there.
Try this...
- Turn the laptop off (not sleep or hibernate but off).
- Connect an external monitor to the laptop.
- Turn on the external monitor.
- Turn on the laptop.
NOTE: You may have to press an "external monitor" button. Could be the f4 button or a button with two monitors on it, for the external monitor to work.
If you can see fine on the external monitor, then your attached display, or the ribbon cable that connects it, are your problem.
If you can't see on the external monitor at all, or the problem occurs on the external monitor as well, then it is probably the graphics card/GPU that is the problem, which may require the motherboard be replaced.
You may also want to try hitting CTRL + SHIFT + WIN + B to try and reset your graphics driver as another possible fix.
IMPORTANT NOTE:
Now if there are no signs of life at all, then it is something more. Could be the battery, the charger, or if the display refuses to work but there are signs of life, then I suggest you contact the manufacturer as it should still be under warranty.