Optoma EP774 Service Manual page 31

Company Confidential
Make sure the USB cable is firmly attached between projector
and computer; the power switch is in ON position and projector
is in STAND BY mode.
<Down>, <Up>, <Right>, <Up>
Press
keypad (DP16/DP18/DP3622 series) or IR remote controller (DP02
series)。 The power and lamp LED will blink and the Projector Control
mode will be enabled.
The New Hardware Wizard launched at the first time Windows
detects a new USB device attached. Use the recommended
suggestion usually works all the way in the process. (Select "No, not
this time"; Press the Next) (Windows XP-SP2)
(Press the Next)
Windows detected and updating the USB Projector Control driver.
Optoma_______________________
31
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key in sequence on
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2007/06/13