Sony PCG-F540 Primary User Manual page 71

You can connect an external display to your notebook. For example, you
can use the computer with any of the following:
Computer display (monitor) (page 59)
Multimedia computer display (page 60)
Projector (page 60)
Use the symbol on the back of the computer to locate the Monitor
connector. Plug the display cable (not supplied) into this connector on
the back of the computer.
If necessary, plug one end of the display power cord into the display,
and the other end into an AC outlet.