Detaching A Thinkpad Docking Station; Guidelines On Connecting Multiple External Displays To A Docking Station - Lenovo ThinkPad L440 User Manual

4. Check the docking status indicator. If the docking status indicator is not turned on, it indicates that your
computer is not correctly attached to the docking station. Check the ac power adapter of the docking
station, or disconnect and reattach the ac power adapter.
Note: If you attach your computer to a docking station, but not connect the ac power adapter of the
docking station to the ac power connector, your computer will enter battery mode.

Detaching a ThinkPad docking station

To detach your computer from a ThinkPad docking station, do the following:
Note: The ThinkPad Basic Dock does not have the system lock.
1. Disconnect all cables and devices from the computer.
2. Ensure that the system lock key is turned to the unlocked position (horizontal).
3. Press the eject button until the computer moves up. Then, grasp both sides of the computer to remove it.

Guidelines on connecting multiple external displays to a docking station

You can connect multiple external displays to a supported ThinkPad docking station. To ensure that the
multiple displays work correctly, observe the following guidelines and connect the displays to appropriate
connectors.
• Do not use the connectors as shown in the following illustrations at the same time for connecting multiple
displays. Otherwise, one of the displays as shown will not work.
– ThinkPad Pro Dock
50
User Guide