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For the ThinkPad Ultra Dock, if you connect two external displays to the DisplayPort connector and the
HDMI connector, the HDMI connector is inactive.
Security features
The system lock key has two positions as shown in the drawing.
The security feature is different when the key is in different positions:
• When the key is in position 1, the eject button of the docking station is locked, and you cannot remove
your computer. The key lock indicator is on when the eject button is locked. The security cable is locked.
• When the key is in position 2, the eject button of the docking station is unlocked, and you can remove your
computer. The key lock indicator is off when the eject button is unlocked. The security cable is locked.
Chapter 7. Enhancing your computer 97