Hi, and sorry for my English.
i've same problem.
Last time i've started my laptop, everything was fine.
I had skype with my girlfriend for an hour, and had a firefox session.
After that, nothing happen, my computer shutdown normaly.
But yesterday, when i've tried to start my laptop, i had the same problem.
All the light are ok, dvd drive and fans spining, but the screen remain black.
I've tried to start it many times, on the battery, without battery, etc...... but nothing happen.
i've plugged it on the AC adapter, and forgot it for an hour.
When i'm back and tried again, it's started. All was ok, i can surf on internet, watch video, music, etc.....
This morning, i've tried to start it another time pschit !!!!!! black screen again.
I suppose this problem can come from the CMOS battery. what do you think about it?
And sorry for my English