Sony PCG-GRT270K - Manual (Page 92)

4. Make sure the port replicator is securely fastened to the computer.
5. Plug the AC adapter into the DC IN port on the port replicator, and plug the power cord into the AC adapter and
an AC outlet. The power indicator turns on.
Connecting an AC Adapter to a Port Replicator
6. Turn on the computer.
Page 92