Garmin 720C User Manual

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 on 
page 12 (for laptops) or in Appendix A (for other systems).

■

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.)

■

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.

720-730.book  Page 22  Thursday, October 30, 2003  11:32 AM