Lenovo ThinkVision E54 - Manual (Page 15)

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THIS MONITOR WILL APPEAR TO BE NON-FUNCTIONAL IF
THERE IS NO VIDEO INPUT SIGNAL. IN ORDER FOR THIS
MONITOR TO OPERATE PROPERLY, THERE MUST BE A VIDEO
INPUT SIGNAL.
This feature is designed to conserve electrical energy by reducing power
consumption when there is no video input signal present.when there is no
video input signal present.When there is no video input signal, this monitor,
following a time-out period,will automatically switch to an OFF mode. And the
LED will turn orange. This reduces the monitor's internal power supply
consumption. After the video input signal is restored, full power is restored
and the display is automatically redrawn. The appearance is similar to a
"Screen Saver" feature except the display is completely off. The display is
restored by pressing a key on the keyboard, or clicking the mouse.
Plug and play
Plug & Play DDC2B Feature
This monitor is equipped with VESA DDC2B capabilities according to the
VESA DDC STANDARD. It allows the monitor to inform the host system of
its identity and, depending on the level of DDC used, communicate additional
information about its display capabilities.
The DDC2B is a bidirectional data channel based on the I2C protocol.
The host can request EDID information over the DDC2B channel.
DDC/CI
This monitor can support DDC/CI.