6. Digital Audio connector (4-1 pin SPDIF_OUT)
This connector is for the S/PDIF audio module to allow digital sound output.
Connect one end of the S/PDIF audio cable to this connector and the other
end to the S/PDIF module.
The S/PDIF out module is purchased separately.
7. Power LED connector (3-pin PLED)
This 3-pin connector is for the system power LED. The system power LED
lights up when you turn on the system power, and blinks when the system is
in sleep mode.