Epson EB-825 - Manual (Page 82)

By using the supplied USB cable to connect the projector to a Windows
computer you can project images from the computer.This function is
called USB Display. Simply by connecting via a USB cable, images from
the computer can be displayed.
Connecting
Procedure
A
Turn the computer on.
B
Connect to the power cable (supplied).
C
Turn the computer on.
D
Open the A/V mute slide knob.
E
Connect to the USB cable.
When audio is output from the projector's speaker, connect
an audio cable (commercially available) to the Audio2 Port.
s "Connecting for the first time" p.83
s "From the second time" p.84
Attention
Connect the projector directly to the computer and not via a USB hub.
Connecting with a USB cable and Projecting (USB Display)
82