1.If the hard drive was not encrypted(its not be default) than you can always plug this hard drive into another computer (£5 usb case) and get your files.
If you really see only LEDs flashing and nothing on screen than 90% motherboard/graphic card is broken, fixing it is never recommended as you will spend loads of money and laptop will die anyway soon.
2.Is there really nothing on the screen, even for 1 second?
3. Use a flashlight and flash onto your screen- can you see anything displayed now? is yes it means just the screen is broken.
4. Plug desktop monitor/screen into laptop. in the back of your laptop there is a port to plug monitor(must be somewhere).
if you haven't got the monitor at home take laptop to friend/lover/milkman/dustman home and try to plug the screen.