If you see a blank screen or a blue screen with the message No Signal after turning on your computer or video source, try the following:
■Make sure the cables are connected correctly, as described in Chapter 1 (for laptops and video sources) or in Appendix A (for desktop computers and other sources).
■Make sure the power light is green and not flashing and the lens cover is off.
■Try restarting your computer.
■Press the Source button on top of the projector to select the correct source. (Allow a few seconds for the projector to sync up after pressing the button.)
If you’re using a PC laptop:
■Hold down the Fn key and press the function key that lets you
display on an external monitor. It may have an icon such as 
or it may be labelled CRT/LCD. Allow a few seconds for the
projector to sync up after pressing it. Check your laptop’s manual or online help for details.
On most systems, the 
or CRT/LCD key lets you toggle between the LCD screen and the projector, or display on both at
the same time.
■Depending on your computer’s video card, you might need to use the Display utility in the Control Panel to make sure that both the LCD screen and external monitor port are enabled. See your computer’s documentation or online help for details.
22Using the Projector