Hi
Is laptop booting up?
is there any display on broken screen to show the laptop has started windows?
There is a hot key to send screen display to internal screen or external screen or both
ususlly the Fn key + one of the Function keys which has a square on it .
Read the hand book user guide for your Advent laptop
You did not say which model laptop you have so no one can look this up for you
regards
Mike Barnes