Sony VAIO PCG-R505JLP User Manual page 44

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Disconnecting the docking station when the notebook is on
You can use the Start Menu in the Windows® task tray or the UNDOCK switch
on the docking station to disconnect your notebook from the docking station
while the notebook is on.
If you switch user accounts using Fast User Switching, the UNDOCK switch function
on the docking station will be interrupted. Instead, follow the instructions to
disconnect the docking station from the Start menu.
From the Start menu
1 Click Start in the Windows® taskbar.
2 Select Unlock Computer to access the Undock Complete dialog box.
Wait for the docking indicator to switch off before undocking the notebook.
Once the Undock Complete dialog box appears, continue on to step 3 to finish
undocking the notebook. This prevents you from leaving the notebook on the docking
station in this released state for too long.
Docking Indicator
3 Release and remove your notebook. See "Disconnecting the docking station
when the notebook is off" for instructions.
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Docking
Indicator