Sony VGN-A140P - Manual (Page 156)

Disconnecting the Port Replicator
To disconnect the port replicator
1. Close any active programs to prevent data loss.
2. Turn off the computer and disconnect the power cord.
3. Slide the LOCK/UNLOCK switch to UNLOCK.
4. Lift the computer away from the port replicator.
Disconnecting a Port Replicator
Page 156