Dell S2715H User Manual page 15

The OSD operates only in the normal operation mode. If you press any button in the
active-off mode, one of the following message is displayed:
*Zero power consumption in OFF mode can only be achieved by disconnecting the
power adapter from the monitor.
**Maximum power consumption with maximum luminance.
Activate the computer and the monitor to gain access to the OSD.
NOTE: This monitor is ENERGY STAR -compliant.
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About Your Monitor | 15