Using the NEC LT-280 Data Video Projector

Getting Started

Connecting power and video cables

Plug the black power cord into the AC IN socket in the back of the projector. Plug the other end of the cord into the wall.

Connect the grey VGA (video) cable to the VGA output port on the back of the computer. Connect the other end of the VGA cable to the port on the projector labeled Computer 1 IN.

Powering on the projector

Computer should be OFF.Remove the lens cap and push the black (I/O) switch on the back of the unit to turn the projector ON.

Hold down the ON/STANDBY button on top of the projector for two seconds. A blue screen should be projected after the lamp warms up. This may take a minute or so.

Turn computer ON. 

Configuring the computer to connect to the projector

 For Macintosh users:

Click on the Apple icon in the upper left corner of the screen. In the menu that appears, click on the System Preferences item.

In System Preferences, under the Hardware section, click on the Displays icon:

A window labeled Color LCD will open, containing the built-in display settings.

Open the application containing your presentation.

If you want to change the size of the image displayed on the projector screen, you can lower the resolution. To do this (from the Color LCD window), click on the Display tab. In the Resolutions box, click on the resolution desired (note: 1152 x 768 is the default, lower resolutions like 800 x 600 display larger -- grayed-out resolutions cannot be selected).

If the laptop's image does not display on the projector screen, click on the Arrangement tab in the Color LCD screen. You'll see a Mirror Displays check box in the lower left corner of the Arrangement window. Click in it to checkmark it. The image displayed by the projector should now be the same as the image displayed on the Mac's screen.

Note: After "mirroring" the displays, you may notice that the cursor seems to have disappeared. Whenever this happens, it has probably actually just gone off the left side of the screen. Stroke the Powerbook touchpad from left to right to move the cursor back onto the visible part of the screen.

If you still cannot get an image to display on the screen, you can try lowering the refresh rate to 60 Hz, accessed through the Display tab (above).

In the Mac's Menu bar, click on System Preferences and then Quit System Preferences.

 For Windows users (Windows ME laptops and newer):

As you start up the computer, a message window may appear on the desktop, stating that the system has detected new hardware and asking if you want it to find a newer driver. Just cancel out of this. Once started up, the desktop image should now automatically display on both the laptop screen and the projection screen.

Open the application containing your presentation.

If the image appears only on the laptop screen but not the projection screen, you may have to press certain function (F) keys to set the laptop to display the image on both. On Dell laptops press and hold (for 2-3 seconds) the Fn key (on bottom of keyboard) together with the F8 key (on top) one time. If the image doesn't display on both screens, press this key combination a second time. If it still doesn't display, press a third time. Toggling through these three sequences should eventually get both screens to display the image.

If the laptop's image still won't appear on both the laptop and projector screen, try lowering the laptop's resolution: Via the Start menu, find the Control Panel. Double-click the Display icon, then click the Settings tab. Set the laptop's resolution to 800x600. Press the Apply button both times to make the changes. The laptop image should now appear on the projector screen.

Note: The display on the laptop screen may appear smaller (i.e., a black border around the dekstop), when it is necessary to bump down the laptop's resolution so that the video card can handle showing the image on both the laptop and the projector at the same time.

Adjusting the display

Image height:

To raise the image to a different height, adjust the height of the front legs. Press up on the release clips above the projector legs to extend the legs while tilting the projector up to the desired height . You can also fine-tune the height by screwing the legs in and out.


If the image is too small or large, adjust this manually using the lever labeled ZOOM on top front of the projector.


If the image is out-of-focus, adjust this manually using the ring labeled FOCUS on top front of the projector.


If the image is not a perfect rectangle, press the 3D REFORM button twice to bring up the keystone settings. Adjust the horizontal and vertical keystone as desired. Press the 3D REFORM button to exit the menu.

Powering off the projector

When finished, close the application and shut down the laptop.

Hold down the ON/STANDBY button for two seconds. It will ask “Are you Sure?” Press the button again. After a few more seconds the screen will go black, but the fan will still be running.

DO NOT UNPLUG OR TURN OFF THE PROJECTOR until the fan stops running. The bulb will be damaged if it is not given adequate time to cool down.

Once the fan stops running, turn the power (I/O) switch on the back of the unit to OFF and unplug the projector.