ThinkPad E550, User Manual

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2 USB 3.0 connector : Used to connect devices that are compatible with USB 3.0 and USB 2.0.
3 Always On USB connector : By default, the Always On USB connector enables you to charge some
mobile digital devices and smartphones no matter when your computer is in sleep mode, hibernation mode,
or is off. For more information, refer to the documentation that comes with the dock.
4 Combo audio connector : Used to connect headphones or a headset that has a 3.5-mm (0.14-inch),
4-pole plug.
5 System-status indicator : The indicator on the illuminated ThinkPad logo functions the same as the ones
on the computer. For details, see “Status indicators” on page 8.
6 Power button : The power button on the dock functions the same as the one on the computer.
Rear view
1 USB 2.0 connector : Used to connect devices that are compatible with USB 2.0.
2 Ethernet connector : Used to connect the dock to an Ethernet LAN. The indicators on this connector
have the same function as the ones on the computer.
3 HDMI connector : Used to connect a digital audio device or video monitor that is compatible with HDMI.
4 Power connector : Used to connect the ac power adapter.
5 Lenovo OneLink connector : Connect the Lenovo OneLink connector to the computer.
ThinkPad OneLink Pro Dock
Depending on the model, your computer might support the ThinkPad OneLink Pro Dock (hereafter referred to
as the dock). Attach your computer to the dock to expand the working capability.
This topic provides basic information about the dock. For detailed information about using the dock, refer
to the documentation that comes with the dock.
Note: Depending on the model, your dock might look slightly different from the illustrations in this topic.
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User Guide