Another black screen victim...

Hello,

Ok, were is the problem, today I was in my living room with my laptop and problem but I went to my room and when I turn on my computer apeared a black screen with a white "bar" on the top flashing.

I already try the recovery function on the f11 but when I press the button nothin happen.

Please help me.

My laptop is a dv6780 special edition ( don't mock me please ).