NEC EA273WM-BK User Manual page 16

OSD Warning
OSD warning menus disappear when EXIT is selected.
NO SIGNAL: This function gives a warning when there is no horizontal or vertical sync. After power is turned on or
when there is a change of input signal, the No Signal window will appear.
OUT OF RANGE: This function gives a recommendation of the optimized resolution and refresh rate. After the power
is turned on or there is a change of input signal or if the video signal doesn't have proper timing, the Out Of Range
menu will appear.
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