Dell S2422HZ User Manual page 42

Unlocking the front-panel control buttons
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.
Options
1
Menu button unlock
2
Power button unlock
3
Menu and power button
unlock
4
Built-in diagnostics
42 | Operating the monitor
Description
Use this option to unlock OSD menu function.
Use this option to unlock power button to turn off
the monitor.
Use this option to unlock OSD menu and power
button to turn off the monitor.
Use this option to run the built-in diagnostics. See
Built-in diagnostics.