Samsung SyncMaster 740NPlus Manual page 14

Connecting the Monitor
Connect the power cord for your monitor to the power port on the back of the monitor.
Plug the power cord for the monitor into a nearby outlet.
Use appropriate connection for your computer.
Using the D-sub (Analog) connector on the video card.
Connect the signal cable to the 15-pin, D-sub port on the back of your monitor.
[ RGB IN ]
Connected to a Macintosh.
Connect the monitor to the Macintosh computer using the D-sub connection cable.
If the monitor and the computer are connected, you can turn them on and use them.
Using the Stand
Monitor Assembly