|Look along the top of the keyboard at the FN split function buttons. There is one with the icon of a monitor try to use it and see if the laptop screen will come back up.|
The second option would be to enter the BIOS by prssing the opropriate keys during the time you just turned on the computer...you will need to look in your manual for the correct key....usually Del, or the F1 or F2 keys. Some computers use the F10, F11, F12 keys.
Once in the Bios look for the video option of start up and make sure that it is correctly set to the laptop's onboard screen.
In reference to 11/05/2008
"So this is how liberty dies. With thunderous applause."
- George Lucas