Left-Side View - Lenovo ThinkPad E550 User Manual

4 ac power connector
5 Lenovo OneLink connector
When the ac power adapter is connected to the ac power connector, it provides power to the computer
and charges the battery. When a supported ThinkPad OneLink Dock or ThinkPad OneLink Pro Dock is
connected to the Lenovo OneLink connector, it can not only extend the computer capabilities but also
provide ac power to the computer and charge the battery.
To use the Lenovo OneLink connector, remove the connector cover from the Lenovo OneLink connector first.
Note: Ensure that you keep the connector cover. Reattach it to the Lenovo OneLink connector when
you are not using the Lenovo OneLink connector.

Left-side view

Figure 4. Left-side view
1
Security-lock slot
3
Ethernet connector
5
High-definition multimedia interface (HDMI™)
connector
7
Always On USB 3.0 connector
1 Security-lock slot
To protect your computer from theft, purchase a security cable lock that fits this security-lock slot to lock
your computer to a stationary object.
Note: You are responsible for evaluating, selecting, and implementing the locking device and security
feature. Lenovo makes no comments, judgments, or warranties about the function, quality, or performance
of the locking device and security feature.
6
User Guide
2
Fan louvers
4
Video graphics array (VGA) connector
6
USB 3.0 connector