Press the System On button on the top left corner of the control panel.
The indicator light will begin blinking. This indicates that the projector is warming up, which may take up to 2 minutes.
After warming up the projector will auto determine which source (VGA vs. HDMI) your laptop is connected to
If you have two sources plugged in, the signal on the digital HDMI input will take priority over the signal from the analog VGA input
Note: Either the HDMI or PC light on the lower wall plate will turn on to indicate which input source is being displayed