Press the “Power” button on your laptop and your Optoma projector to shut them off. …
Plug one end of an HDMI cable into the HDMI input on your Optoma projector. …
Plug the other end of the cable into your laptop’s HDMI port, being careful to ensure that it is oriented the right way.
Turn on your Optoma projector by pressing its “Power” button. Wait for it to warm up and begin displaying an image.
Press the “Source” button on your Optoma projector or its remote control until you select the HDMI input to which your computer is connected.
Press the “Power” button on your computer to turn it on and start the bootup process.
Press your laptop’s special key combination to activate its HDMI port once it boots up, if you do not see its screen being projected. The key combination varies depending on your laptop’s model and make, but usually involves holding down the the “Fn” key while pressing one of the numbered “F” keys on the top row of the keyboard. Look for an “F” key with a picture of a monitor, a computer and a monitor, a VGA port, or text containing a combination of words like “CRT,” “VGA” or “LCD.”
