Dell E2223HV User Manual page 24

To unlock the button(s).
Press and hold Button 4 for four seconds until a menu appears on the screen. The following
table describes the options to unlock the front-panel control buttons.
Dell 22 Monitor
Select option:
Options
1
Menu Buttons unlock
2
Power Button unlock
3
Menu and Power Buttons
unlock
4
Built-in Diagnostics
│
24 Operating your monitor
Dell 22 Monitor
Select option:
Use this option to unlock OSD menu function.
Use this option to unlock power button.
Use this option to unlock OSD menu and power button.
Use this option to run the built-in diagnostics, see
in diagnostics.
Dell 22 Monitor
Select option:
Description
Built-