Epson BrightLink 1485Fi 5000-Lumen Pixel-Shift Full HD Ultra-Short Throw 3LCD Interactive Laser Projector - Manual (Page 45)

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3. Connect an HDMI cable to the In1 or In2 port on the bottom of the control pad, then connect the
other end of the cable to any available HDMI port on your computer.
4. Press the 1 or 2 button on the control pad to select the port your computer is connected to.
The projector switches the input source to HDBaseT , displays the image from your computer's
desktop, and outputs sound, if your presentation contains audio.
5. If you want to operate your computer from the projected screen using the interactive pens or your
fingers, connect the USB cable to the
USB-B port on the bottom of the control pad and any available
USB port on your computer.
Parent topic: Connecting to Computer Sources
Connecting to a Computer for Sound
If your computer presentation includes sound and you did not connect it to a projector port that receives
audio signals, you can still play sound through the projector's speaker system. Just connect an optional
3.5 mm stereo mini-jack audio cable as described here.
Note: Make sure the audio cable you use is labeled "No resistance."
1. Connect the audio cable to your laptop's headphone or audio-out jack, or your desktop's speaker or
audio-out port.