Samsung 204B - Manual (Page 12)

1. POWER ON/OFF Switch :
Use this button for turn the monitor on and off
2. POWER port : Power cord, plugs into monitor and wall
receptacle.
DVI IN port : Connect the DVI Cable to the DVI IN port on the
back of your monitor. (SOURCE : Digital)
RGB IN port : Connect the signal cable to the RGB IN port on
the back of your monitor. (SOURCE : Analog)