Lenovo LS2421p Wide 23.6in Flat Panel Monitor - Manual (Page 8)

Chapter 1.
1-4
3. Connect the analog signal cable to the video port on the back of the computer.
Note: One end of the signal cable is already pre-attached to your monitor.
4. Connect one end of the HDMI cable to the monitor HDMI connector and the other end to
the computer if it has one HDMI output connector.
5. Connect the USB cable to the upstream USB port of the back of the monitor and the other
end to an appropriate USB port on your computer.
Note: The USB port keep available as long as the power supply is right. No matter whether the
power button is on or off .