Sony VGN-S3VP User Manual page 86

5 Align the bottom connector of the computer with the connector on the port replicator and push down until it clicks into place.
6 Turn on the computer.
Use the AC adapter that comes with your computer or the optional Sony adapter.
!
Do not move your computer while attached to the port replicator, as it may detach the port replicator and cause damage to the port replicator and the computer.
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Connecting peripheral devices