[Pierson]

If you are using a Dell... use the combo of Fn+F8 to cycle between CRT and LCD outputs. Also, if you have done this to no avail, lower the screen resolution on the laptop. Some projectors can only handle low resolutions. Try dropping it down to 800x600 and then look on your keyboard for little text on your F keys that says either CRT/LCD or has a picture of two monitors side by side separated by a |. Hold down the key that color codes to the CRT/LCD or monitors and press that combo a couple times.