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1 Eject request button: Press the eject request button to undock the computer.
2 Docking status indicator: This indicator lights red when your computer is docked. It blinks when the
eject request button is pressed.
3 Eject lever: Use it to lift your computer up from the ThinkPad UltraBase Series 3 when you undock the
computer.
4 Speakers
Attaching the ThinkPad UltraBase Series 3
Attention: Before you attach the ThinkPad UltraBase Series 3, disconnect the ac power adapter from
your computer. The ac power connector will be damaged if it remains connected to the computer during
the attachment.
You can hot attach or warm attach the computer to the ThinkPad UltraBase Series 3. Hot attachment is
attaching the computer to the ThinkPad UltraBase Series 3 while the computer is in operating mode; warm
attachment is attaching the computer to the ThinkPad UltraBase Series 3 while the computer is in sleep
mode.
In doing a hot or warm attachment, note the following:
• For hot attachment: The docking status indicator should turn on after a few seconds.
• For warm attachment: When the computer resumes from sleep mode, the docking status indicator
should turn on.
To attach your computer to a ThinkPad UltraBase Series 3, do the following:
1. Ensure that the system lock key of the ThinkPad UltraBase Series 3 is in the unlocked (vertical) position.
92 User Guide