Dell U2913WM Monitor - Manual (Page 31)

3
Menu
Use the MENU button to launch the on-screen display (OSD) and select the OSD Menu. See Accessing the Menu System .
4
Exit
Use this button to go back to the main menu or exit the OSD main menu.
5
Power
(with glowing LED)
Use the Power button to turn the monitor on and off.
The white LED indicates the monitor is on and fully functional.
A glowing white LED indicates DPMS power save mode.