Acer H6815BD Series User Manual page 40

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"Image size is over defined range" will be displayed in the tool status when the
image is too large, and "Load Image fail" will be displayed when the image
format is not supported.
5. Downloading the image to the projector
Press "Download" to start downloading the image to the projector.
Note: If "Unknown" is shown in the Manufacture or Device ID
field, the projector is not in a status suitable for download. Go
back to step 1 and try again.
After the image is downloaded successfully, the projector will
automatically shut down (enter standby mode), and the Startup Screen
function in the OSD menu will be set to "User".