Garmin 821P 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 in 
Chapter 1.

■

Make sure the 

Power

 light is green and not flashing and the lens 

cap is off. 

■

Make sure you’ve selected the correct image source; see page 32. 
Allow a few seconds for the projector to sync up after pressing the 
button. 

■

Check the Signal menu to make sure the correct input source is 
selected. See page 55.

■

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 notebook’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. 

■

If you’re projecting from a notebook and you don’t see the same 
image on the projection screen and computer screen, check your 
monitor settings to make sure both the LCD screen and the 
external monitor port are enabled. 

From the Control Panel, open the 

Display

 utility. Click the 

Settings

 tab, then click 

Advanced

. The method for adjusting 

the settings varies by brand; you may need to click a 

Monitor

 tab, 

then make sure the external Monitor port is set as your primary 
display and/or enabled. See your computer’s documentation or 
online help for details.