Samsung SP-P310ME - Manual (Page 20)

Connect a PC/Composite cable to the [PC/COMPOSITE] port on the side of the projector and then connect the
[COMPOSITE Input (Yellow)] connector of the PC/Composite cable to the VIDEO OUT (Yellow) port of the AV device
using a video cable.
When all the connections above have been completed, turn the projector and video devices on.
How to Use
Selecting the external input source.
Press the SOURCE button and select the Composite input ( SOURCE )
Select the Composite input using the Menu and the Adjust buttons.
( Menu > Input > Source List > Composite )
Turn on the connected AV device and check.
To listen to audio, a separate audio system is required.