Sony VGN-SR390P - Manual (Page 79)

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Using Peripheral Devices
Disconnecting Your Computer from the Docking Station
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Make sure that no devices connected to the docking station are in use before disconnecting your computer.
Do not disconnect your computer from the docking station while the IN USE indicator light is lit. Disconnecting the computer while the IN USE indicator
is lit may result in loss of unsaved data or a failure of the computer.
When the battery pack is running out of power, disconnecting your computer from the docking station may result in loss of unsaved data.
Do not disconnect your computer from the docking station during video playback. Be sure to close video playback software before disconnection.
Once you have completed the steps in To disconnect your computer from the docking station (page 80) , be sure to take your computer off the docking
station. Use of the computer while on the docking station may cause unstable operations.