Lenovo LI2721s Wide Flat Panel Monitor - Manual (Page 9)

Chapter 1.
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4. Connect the digital cable to the DVI connector of the monitor and the other end on the
back of the computer.
5. 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.
6. Plug the speaker's audio cable to audio jack of the monitor and the other end on the
external speaker audio in jack.
Note: The audio output only for HDMI mode.
HDMI