NEC 1850X User Manual page 19

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 the video signal doesn't have proper
timing, the Out Of Range menu will appear.
CHECK CABLE: This function will advise you to check
all Video Inputs on the monitor and computer to make
sure they are properly connected.
NOTE: If " CHANGE DVI SELECTION" is displayed, switch to
DVI SELECTION.
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