Sony VGN-TT11LN/B User Manual page 91

Alternatively, you can disconnect the computer from the docking station as follows:
1 Click Start, the arrow next to the Lock button, and Undock.
2 Make sure that a message balloon appears and the IN USE indicator light turns off. Then lift the computer off the docking
station.
3 Replace the docking station connector cover to the bottom of the computer.
!
It is extremely important to replace the docking station connector cover after disconnecting your computer from the docking station. If the cover is left
unattached, dust may get inside and damage the computer.
✍
To disconnect the docking station completely from AC power, unplug the AC adapter.
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Using Peripheral Devices