If it is making sounds and showing lights, it may be the display and not that laptop that isn't turning on. In that case try option 1. However, if nothing at all is happening/turning on (lights, sounds, etc.,) then try option 2.
Option 1 ...
Try this...
1. Turn the laptop off (not sleep or hibernate but off).
2. Connect an external monitor to the laptop.
3. Turn on the external monitor.
4. 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...