Sony VGN-B1XP Hardware Manual page 72

Attaching your computer to the docking station (VGN-B series)
To attach your computer to a docking station, proceed as follows:
1
Disconnect all peripherals from the computer.
2 Plug the cable attached to the AC adapter (1) into the DC In port (2) on the docking station (3).
3
Plug the power cord (4) into the AC adapter and an AC outlet.
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Connecting peripheral devices