Lenovo ThinkPad S540 User Manual page 20

2 SIM card slot (on some models)
Your computer might have a Subscriber Identification Module (SIM) card slot. Depending on the model,
a SIM card might be installed in your computer.
3
Combo audio connector
Connect headphones or a headset that has a 3.5-mm (0.14-inch) 4-pole plug to the combo audio connector
to listen to the sound from the computer.
Notes:
• If you are using a headset with a function switch, for example, a headset for a mobile digital device, do
not press this switch while using the headset. If you press it, the headset microphone will be disabled,
and the microphones on the computer will be enabled instead.
• The combo audio connector does not support a conventional microphone. For more information, see
"Using audio features" on page 39.
4
USB 3.0 connector
The Universal Serial Bus (USB) 3.0 connector is used for connecting devices compatible with a USB
interface, such as a USB printer or a digital camera.
Attention: When you attach a USB cable to this connector, ensure that the USB mark is facing upward.
Otherwise the connector might be damaged.
5 HDMI connector
Your computer supports the high definition multimedia interface (HDMI), a digital audio and video interface
that can connect a compatible digital audio device or video monitor, such as a DVD player or a digital
television (DTV).
Note: If you connect the computer to a supported ThinkPad OneLink Dock, use the HMDI connector on
the dock, not the one on the computer.
6 Ethernet connector
Connect your computer to a local area network (LAN) with the Ethernet connector.
DANGER
To avoid the risk of electrical shock, do not connect the telephone cable to the Ethernet connector.
You can only connect an Ethernet cable to this connector.
Two indicators, to the upper right and left of the connector, show the status of the network connection.
When your computer connects to a LAN and a session with the network is available, the upper left indicator
is solid green. While data is being transmitted, the upper right indicator blinks yellow.
Note: If you connect the computer to a supported ThinkPad OneLink Dock, use the Ethernet connector on
the dock to connect to a LAN, not the one on the computer.
4
User Guide