My hp laptop screen won't turn on?

I just tried turning on my laptop and I can hear it turning on, but the screen won't start up. I don't think the actual screen is broken, because if it was just the screen, my wireless internet button would change from orange to white after it has been on for a little bit. Also, the caps lock button keeps on blinking. Does anyone know whats wrong? It is an hp (not sure exactly what kind) and I got it last august so it's not even a year old.