Optoma HD83 Service Manual page 56

5. When "uImage" downloads compeletly,
"Downloading :root.cramfs" will running automatically.
6. When message "Flash Completed" appears, click
"OK".
7. Press "Power off ", "Left", "Left" and "Up" button of
remote to get into service mode to check firmware
version.
HD83 Confidential
5-5