InFocus IN1501 User Manual page 16

Problem
No computer image, just the words "Signal out of
range"
Only my laptop's background appears, not the
Desktop icons
Solution
Press the Auto Image button on keypad 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 following problem, "image fuzzy
or cropped"
If your computer is using the DisplayLink connector, use
DisplayLink Manager software to change the display mode
from Extended Desktop to Duplicated Desktop. See the
DisplayLink Software User's Guide for more information.
Disable "Extend my Windows Desktop" in Control Panel >
Display > Settings > Display 2 (location varies by operating
system)
Uncheck this
option, then
click Apply
15
Result
Computer image projected
Background and Desktop projected