Dell UltraSharp 27 User Manual page 79

If either DP, HDMI or USB-C input is selected and the corresponding cable is not
connected, a floating dialog box as shown below appears.
See Troubleshooting
No DP Cable
The display will go into Standby Mode in 4 minutes.
www.dell.com/U2723QX/U2723QE/U3223QE
No HDMI Cable
The display will go into Standby Mode in 4 minutes.
www.dell.com/U2723QX/U2723QE/U3223QE
No USB-C Cable
The display will go into Standby Mode in 4 minutes.
www.dell.com/U2723QX/U2723QE/U3223QE
for more information.
or
or
Operating the Monitor | 79