Acer notebook doesn't go past the Acer scr...

Hi!
I'm about to die here...My acer aspire 5100 doesn't go past the acer screen, when I turn it on...it only says press F2 to enter setup in the lower left corner. When I do that, there comes a black screen with a lot of information about the pc , then it turns off.
When I don't press f2 it just turns off after a couple of seconds...
HELP
I tried pressing F10 after turn on, doesn't help (read that somewhere else:-(