1 Audio connector
You can connect headphones or a headset with a 3.5-mm (0.14-inch), 4-pole plug to the audio connector to
listen to the sound from the computer.
If you are using a headset with a function switch, do not press this switch while using the headset. If you
press the switch, the headset microphone is disabled, and the integrated microphones on the computer is
enabled instead.
Note: The audio connector does not support a conventional microphone. For more information, see “Using
audio features” on page 28.
2 Always On USB connector (USB 2.0)
By default, the Always On USB connector enables you to charge the USB-compatible devices in the
following situations:
• When your computer is on or in sleep mode
• When your computer is off or in hibernation mode, but connected to ac power
Attention: When you attach a USB cable to this connector, ensure that the USB mark is facing upward.
Otherwise the connector might get damaged.
To charge these devices when the computer is off or in hibernation mode, and the computer is not
connected to ac power, do the following:
• For Windows 7: Start the Power Manager program, click the Global Power Settings tab, and then follow
the instructions on the screen to make your preferred setting.
• For Windows 10: Start the Lenovo Companion program, click Hardware Settings ➙ Always On USB.
Locate the Always On USB section and follow the instructions on the screen to make your preferred
setting.
For instructions on how to start the programs, see “Accessing Lenovo programs” on page 11.
3 Ethernet connector
Connect the 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.
The Ethernet connector has two indicators that show the status of the network connection. When the green
indicator is on, it indicates that the computer is connected to a LAN and a session with the network is
available. When the indicator blinks yellow, data is being transmitted.
4 Optical-drive bay (available on some models)
Some computer models might come with an optical drive.
5 Security-lock slot
To protect your computer from theft, lock your computer to a desk, table, or other fixture through a security
cable lock that fits this security-lock slot.
Chapter 1. Product overview 3
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