When I start my pc the screen is black

Compaq presario cq57 windows 7

Well I just became familiar with my new laptop computer and I have clickd'autant on the projector or start my projector and now the black start screen and I don't know how to solve this problem, I am running in safe mode now

well what I have now started up, I pressd f8 key and that helpd fix it me

Tags: Notebooks

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