My screen is black but the lights are working.

Hello



I have a Toshiba Satellite and for 2 months I'm having he same problem I turns my laptop and sometimes it goes completely blank the screen doesn't work although the light are on after some seconds of waiting the van start to like like crazy and do a loud sound.Some times after a week it turns on again and then when I turn it of the next time it doesn't turn again. It never fall down and I never drop anything on it.

I've tried already to unplug it and take battery and then turn it on after pressing the start button , I've press Fn and F5 and nothing... don't know what to do...I think he is dying =/ but it only have two years and half.

Thank you!

Pereira