acer aspire 9300 boot problems?

hi,

i have the acer aspire 9300, and i dont get a display when the laptop isnt plugged in and when it is plugged in i have to press f2 before i get a display?

can anyone give me a explination to why this may be?

cheers

 

an update,

-so the laptop doesn't show any screen when there is no power cable inserted
-when the laptop is plugged in and f2 is pressed the laptop displays the screen perfectly and runs into windows
-the battery works fine once in windows mode
- if you close the lid of the laptop the screen goes black and you cannot see anything until you turn the computer off by the button
-sometimes the laptop just stops on the "windows is shutting down" screen and stays on that screen

this is really confusing? any ideas what this may be?

any help is much appreciated