Sony VGN-S660P - Manual (Page 59)

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Using Peripheral Devices
Disconnecting Your Computer from the Port Replicator
!
To prevent loss of unsaved data, be sure to turn off the computer before disconnecting it from the port replicator.
To disconnect your computer from the port replicator
1 Turn off the computer and the connected peripherals.
2 Push the release buttons (1) at the same time.
3 Lift the computer away from the port replicator.