Lenovo IDEACENTRE K3 User Manual page 14

Note: If the audio configuration interfaces above are different from
those on your computer, you may use the above steps as a reference to
configure the 7.1 surround sound audio device system in your actual audio
configuration interface and read the electronic Help information for further
assistance.
1.3.7 Connect any additional devices that you have. Your
computer may not have all the connectors shown here.
USB connector
TV tuner
connector
Ethernet
connector
1.3.8 Connect the power cords properly to grounded electrical
outlets.
Use this connector to attach a device that requires a USB
connection.
Only supported on systems with optional TV tuner card.
Use this connector to attach the computer to an Ethernet-
type local area network.
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User Guide