Dell S2721QSA User Manual page 61

When the monitor goes into Standby mode, the following message appears:
Activate the computer and wake up the monitor to gain access to the OSD.
NOTE: The message may be slightly different according to the
connected input signal.
The OSD functions only in the normal operation mode. If you press any button other
than the power button during the Standby mode, the following message will appear
depending on the selected input:
Activate the computer and the monitor to gain access to the OSD.
NOTE: The message may be slightly different according to the
connected input signal.
If either HDMI or DisplayPort input is selected and the corresponding cable is not
connected, a floating dialog box as shown below appears.
NOTE: The message may be slightly different according to the
connected input signal.
Operating the monitor
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