SOYO Motherboard SY-6BA+ IV - Manual (Page 37)

Hardware Installation SY-6BA+ IV
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5. IDE LED
Attach the 2-pin IDE device LED cable to the corresponding IDE LED
header on the Motherboard. This will cause the LED to lighten when an
IDE (HDD, CD-ROM) device is active.
6. ATX Power On/Off Switch
Attach the 2-pin momentary type switch to the PWRBT header for turning
On or Off your ATX power supply.
HDD LED Pin Assignment
+
_
LED Anode LED Cathode
PWRBT Pin Assignment
Power On/Off GND
1