Dell U3818DW User Manual page 48

When the monitor enters the Power Save 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.
If you press any button other than the power button, the following message will appear
depending on the selected input:
NOTE: The message may be slightly different according to the connected input
signal.
If either USB Type-C, HDMI, or DP 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.
See Troubleshooting
48
| Operating the Monitor
for more information.