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NEC EA243WM-BK User Manual page 23

24" led-backlit desktop monitor w/ integrated speakers
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No Sound
Make sure the speaker cable is proper connected.
Check to see if mute is activated.
Check the volume in the OSD menu.
Check selected OSD's Tools to "SOUND INPUT", when DisplayPort or HDMI is in use.
Brightness variations over time
Change Auto Brightness to OFF and adjust brightness.
NOTE:
When Auto Brightness is set to ON, the monitor automatically adjusts brightness based on the environment.
When the brightness of surrounding environment changes, the monitor will also change.
USB Hub does not operate
Check to make sure the USB cord is properly connected. Refer to your USB devise User's Manual.
Human sensor does not work
If human icon on SENSOR SETTING (HUMAN SENSING) is located on vermilion color, it is detected that there is
person.
Make sure there is no object in front of Human sensor.
Make sure there is no equipment which radiating infrared rays in front of monitor.
ControlSync does not work
Check to make sure that ControlSync cable is connected correctly.
Check to make sure that ControlSync cable is not in "loop" connection.
Master monitor should be connected OUT connector only.
Please use provided ControlSync cable.
You can use up to 5 sub monitors via ControlSync.
English-21

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