Sony VAIO VAIO PCG505F User Manual page 50

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You can use the port replicator to connect an external display to your
notebook computer. For example, you can use the computer with any of
the following:
Computer display (monitor) (page 38)
Projector (page 39)
Use the symbol on the port replicator to locate the Monitor
connector. Plug the display cable into this connector.
If necessary, plug one end of the display power cord into the display,
and the other end into an AC outlet.