AB Soft ATX 12V - Manual (Page 31)

Hardware Installation SY- P4I865PE Plus DRAGON 2
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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
IDE1 or IDE2 (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. Note that 5VSB will always have power,
so the 5V standby LED will always be lit.
HDD LED Pin Assignment
+ _
LED Anode LED Cathode
Pin9 Pin10
PWRBT Pin Assignment
Power On/Off GND
Pin4 Pin5