Connecting a Laptop Computer
To a Classroom Data Projector with Auto Switching

All North Central College classrooms and meeting rooms include an aux cable to connect laptop computers to the ceiling mounted data projection systems.

When connected, the laptop image replaces the desktop computer image on the projector. If connected, the audio from the laptop computer will also switch over and play on the classroom speaker.

Please do not unplug ANY cable from the back of any classroom equipment or from the connection plate on the wall.


Step 1 Turn on the laptop computer. If it's a college laptop, login using your username and password.  
Step 2

Turn on the classroom data projector using the projector's remote control.

Press the "ON" or "Power" button


The data projector defaults to the last input used, or in the case of HDMI rooms, to HDMI 1.

In VGA classrooms, make sure the input is set to "Computer 1" by pressing the "Computer 1" button on the remote control.

In HDMI classrooms, make sure the input is set to "HDMI 1"

Step 3

In the majority of classrooms, a cart similar to the one shown at the right is used for the desktop computer.

An HD15 cable with audio is available on each cart. Here, it can be seen between the computer and DVD player.

Step 4

For VGA rooms, plug the HD15 cable into the external monitor port on the laptop computer.

If audio is desired, plug the stereo mini audio cable into the headphone jack of the laptop computer.


As soon as the connection is made, the laptop image should automatically be sent to the data projector, overriding the desktop computer's image.

If this does not occur, the laptop computer's external monitor must be turned on.


Step 4


If the classroom is equipped with HDMI connections, Connect the HDMI cable to the HDMI port on your laptop computer. An appropriate adapter may be needed for your particular type of computer.

Once connected, the computer and display will communicate, and the laptop image will replace the desktop image on the data projector.

If this does not occur within 20 seconds, check the cable to make sure it is seated correctly.

Depending upon your computer, you may need to "turn on" the external port on your computer.

    Revised 07-17
Send comments about this page to Tom Gill, Instructional Media Coordinator