Optoma EP774 Service Manual page 36

Appendix-B
Projector USB status on Windows Device Manager
The USB HID device will be installed automatically via Windows' USB hot-plug mechanism.
The Projector Control will be dynamically installed
entering the maintenance mode
(Hit key sequence as <down>, <up>, <right>, <up>);
Projector Flashtool will be dynamically installed
when starting the flash upgrading by Flashtool or FlashtoolBL utility.
The WIndriver is the root driver for both Projector Control and Flashtool.
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