Dell UltraSharp U2421HE User Manual page 17

The OSD operates only in the normal operation mode. If you press any button in the active-
off mode, the following message is displayed:
*Zero power consumption in OFF mode can only be achieved by disconnecting
the AC mains cable from the monitor.
**Maximum power consumption with maximum luminance, and USB active.
This document is informational only and reflects laboratory performance. Your product may
perform differently, depending on the software, components and peripherals you ordered
and shall have no obligation to update such information. Accordingly, the customer should
not rely upon this information in making decisions about electrical tolerances or otherwise.
No warranty as to accuracy or completeness is expressed or implied.
Activate the computer and the monitor to gain access to the OSD.
NOTE: This monitor is ENERGY STAR certified.
This product qualifies for ENERGY STAR in the factory default settings which can be
restored by "Factory Reset" function in the OSD menu. Changing the factory default
settings or enabling other features may increase power consumption that could exceed
the ENERGY STAR specified limit.
NOTE:
P : Power consumption of On Mode as defined in Energy Star 8.0 version.
on
TEC: Total energy consumption in kWh as defined in Energy Star 8.0 version.
Dell UltraSharp 24/27 Monitor
No DP signal from your device.
Press any key on the keyboard or move the mouse or wake it up.
If there is no display, press the monitor button again to select the correct
input source.
U2421HE/U2721DE
About Your Monitor | 17