BOXLIGHT CD-850m - Manual (Page 17)

16
No computer image, just the words “Signal out of
range”
Adjust computer refresh rate in Control
Panel>Display>Settings>Advanced>
Adapter (location varies by operating
system)
Computer image projected
A Signal
out of
range
You may also need to set a different
resolution on your computer, as shown
in the following Problem, “Image fuzzy
or cropped”
A
A