Dell S2421HN User Manual page 48

If you press any button other than the power button, the following messages will
appear depending on the selected input:
S2421HN/S2421NX
Dell 24 Monitor
No HDMI1 signal from your device.
Press any key on the keyboard or move the mouse to wake it up.
If there is no display, press the monitor button again to select
the correct input source.
If either HDMI1, HDMI2 input is selected and the corresponding cable is not connected,
a floating dialog box as shown below appears.
S2421HN/S2421NX
Dell 24 Monitor
No HDMI1 Cable
The display will go into Standby Mode in 4 minutes.
www.dell.com/support/S2421HN
www.dell.com/support/S2421NX
Dell 24 Monitor
No HDMI2 Cable
The display will go into Standby Mode in 4 minutes.
www.dell.com/support/S2421HN
www.dell.com/support/S2421NX
See Troubleshooting
48 | Operating the monitor
S2421HN/S2421NX
S2421HN/S2421NX
or
S2421HN/S2421NX
for more information.
S2721HN/S2721NX
Dell 27 Monitor
No HDMI1 signal from your device.
Press any key on the keyboard or move the mouse to wake it up.
If there is no display, press the monitor button again to select
the correct input source.
S2721HN/S2721NX
Dell 27 Monitor
No HDMI1 Cable
The display will go into Standby Mode in 4 minutes.
www.dell.com/support/S2721HN
www.dell.com/support/S2721NX
or
Dell 27 Monitor
No HDMI2 Cable
The display will go into Power Save Mode in 4 minutes.
www.dell.com/support/S2721HN
www.dell.com/support/S2721NX
S2721HN/S2721NX
S2721HN/S2721NX
S2721HN/S2721NX