Q: After Capitan MacBook Pro tottaly crashed...

Hi,

I have a Macbook Pro (from 2013) and it's one of my favorite laptops (although it's used only for writing etc, because of the overheating prob if u play games).

Anw, i installed El Capitan and i realized that it became slower. Then, suddenly, the wi-fi crashed ("no hardware installed"), i restarted the laptop (or i tried to) and it never started again. I hear the usual noise (that it is working, not the start-up one), but the screen is black and the Capitan never boot (black screen, no cursor).

I tried shift for safe mode with no result. I tried alt,cmd, p,r after power with also no result. In fact when i press power alone, it works, but with the other buttons it doesn't even work.

Also, i tried cmd+r and cmd+s, again no result.

What else could i do? I am so bored to install everything again (i did it after snow leopard in the past when i have tried everything) and also now i have no back up...

Any ideas?

Thanks in advance for any help or piece of advice.

MacBook Pro, iOS 9.2