Epson PowerLite 1781W 3200-Lumen WXGA 3LCD Projector - Manual (Page 32)

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2. Connect the other end to the projector's HDMI port.
Note: The projector converts the digital audio signal sent from your computer into a mono analog signal
for the internal speaker. If you have problems hearing audio through the HDMI connection, connect one
end of an optional 3.5 mm stereo mini-jack audio cable to the projector's
Audio port and the other end to
your computer's audio out port. Then select the audio port you connected to as the HDMI Audio Output
setting in the Extended menu.
Parent topic: Connecting to Computer Sources
Connecting to a Computer for USB Mouse Control
If you connected your computer to a Computer , USB-B , or HDMI port on the projector, you can set up
the remote control to act as a wireless mouse. This lets you control projection at a distance from your
computer. To do this, connect the projector to your computer using a USB cable, if it is not connected
already.
1. Connect the USB cable to your projector's USB-B port.