Lenovo ThinkPad T420si (English) User Guide - Page 161

If your computer is operating, make sure that it has finished operations involving devices that are

Page 161 highlights

2. Make sure that the system lock key of the ThinkPad Mini Dock Series 3, the ThinkPad Mini Dock Plus Series 3, or the ThinkPad Mini Dock Plus Series 3 (170 W) is in place and in the unlocked (horizontal) position. 3. Press the eject button (1) until the computer moves up; then, grasping both sides, remove the computer (2). To detach your computer from the ThinkPad Port Replicator Series 3, do the following: Notes: • If your computer is operating, make sure that it has finished operations involving devices that are connected to the USB connector. Also make sure that any Ethernet connection is stopped. • Make sure that the battery pack is fully charged. 1. Make sure that all ejectable devices connected to the ThinkPad Port Replicator Series 3 are stopped. Chapter 7. Enhancing your computer 145

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2. Make sure that the system lock key of the ThinkPad Mini Dock Series 3, the ThinkPad Mini Dock Plus
Series 3, or the ThinkPad Mini Dock Plus Series 3 (170 W) is in place and in the unlocked (horizontal)
position.
3. Press the eject button (1) until the computer moves up; then, grasping both sides, remove the computer
(2).
To detach your computer from the ThinkPad Port Replicator Series 3, do the following:
Notes:
If your computer is operating, make sure that it has finished operations involving devices that are
connected to the USB connector. Also make sure that any Ethernet connection is stopped.
Make sure that the battery pack is fully charged.
1. Make sure that all ejectable devices connected to the ThinkPad Port Replicator Series 3 are stopped.
Chapter 7
.
Enhancing your computer
145