Boxlight Cd-40m Users Guide

24
Using the Projector
Rear Projection
When you turn Rear Projection on, the projector reverses the 
image so you can project from behind a translucent screen. High-
light Rear Projection, then click either mouse button to turn this 
feature on and off.
Default Source
Default Source toggles between Computer and Video. This deter-
mines which source the projector checks first for active video 
during power-up. Highlight Default Source and click either 
mouse button to toggle between the options.
Auto...

25
Display Startup Screen
This setting toggles between On and Off. When this feature is On, 
the startup screen appears when the projector starts up and 
remains until an active source is detected. Click either mouse but-
ton to turn this feature off and display a plain black or blue screen 
instead of the startup screen. 
Language Menu
FIGURE 17
Language menu
You can display the on-screen menus in English, French, German, 
and Spanish. 
•Move the cursor to the language you want, then click either 
mouse...

26
Using the Projector
Status Menu
This is a read-only window for informational purposes. To dis-
play the status window, select Show status from the menu, then 
click either mouse button. To remove the window, click either 
mouse button.
FIGURE 18
Status menu
Lamp hours used
Indicates how many hours the current lamp has been in use. The 
counter starts at zero hours and counts each hour the lamp is in 
use. Change the bulb when the brightness is no longer accept-
able. See “Replacing the Projection...

27
Mute status
Indicates if the audio is muted.
Software version
Indicates the projector ’s software version. This information is 
useful when contacting Technical Support.
CablePro version
Indicates the CablePro’s software version. This information is 
useful when contacting Technical Support. No version is listed 
for the CablePro Lite cable.
Source
Indicates the active source, Computer or Video.
Speakers
Indicates if external speakers are connected. 

29
MAINTENANCE & TROUBLESHOOTING
This section describes how to:
•clean the lens
•replace the projection lamp 
•use the Kensington lock feature
•troubleshoot the projector
Cleaning the Lens
Follow these steps to clean the projection lens:
1Apply a non-abrasive camera lens cleaner to a soft, dry cloth.
•Avoid using an excessive amount of cleaner.
•Abrasive cleaners, solvents or other harsh chemicals might 
scratch the lens.
2Lightly wipe the cleaning cloth over the lens.
3If you don’t intend to use the...

30
Maintenance & Troubleshooting
4Pull the lamp door up and remove it.
FIGURE 19
Removing the lamp door
CAUTION: Never operate the
projector with the lamp door open
or removed. This disrupts the air
flow and causes the projector to
overheat.
5Loosen the two non-removable screws on the outside of the 
module.
FIGURE 20
Loosening the screws on the lamp module 

31
6Slide the lamp connector to the right to disconnect it from the 
projector (Figure 21).
FIGURE 21
Sliding the lamp connector
7Remove the module (Figure 22).
WARNING: Do not drop the 
lamp module or touch the glass 
bulb! The glass may shatter and 
cause injury.
F
IGURE 22
Removing the lamp module 

32
Maintenance & Troubleshooting
8Align the new lamp module in the correct direction.
9Gently push the module in as far as it goes.
10Tighten the screws on the outside of the module. 
11Slide the lamp connector to the left to re-attach it.
12Insert the tabs at the top of the lamp door into the projector 
and press the lamp door into place.
13Plug in the power cord and turn the projector back on.
14To reset the lamp hour counter in the Status window, press 
and hold the left mouse button, then press the...

33
Troubleshooting
Problem: Nothing on projection screen
•Make sure that the power cord is properly connected to a func-
tional AC electrical outlet. Make sure that the power cord is 
also properly connected to the projector.
•If the projector is plugged into a power strip, make sure the 
power strip is turned on.
•Make sure you have removed the lens cap on the projection 
lens at the front of the projector.
•Make sure the projector is switched on.
•Check the projector ’s lamp to ensure that it is...