InFocus LP 815 User Manual page 20

No computer image, just the words "Signal out of
range"
Only my laptop's background appears, not the
Desktop icons
Adjust computer refresh rate in Control
Panel>Display>Settings>Advanced>
Adapter (location varies by operating
system)
You may also need to set a different
resolution on your computer, as shown
in the problem, "Image fuzzy
or cropped"
Disable "Extend my Windows Desktop" in
Control Panel>Display>Settings>Display 2
(location varies by operating system)
Uncheck this
option, then
click Apply
18
Computer image projected
Background and Desktop projected