PCchips M581 Series User Manual page 19

See the illustration below for a guide to the J9 connector pin
assignments.
Keylock
Pins 8-10
Power LED
Pins 2-4-6
2
1
HDD LED
Speaker
Pins 15-16
Pins 1-3-5-7
2: Mainboard Installation
Reset Switch
Pins 17-18
Power Button/Suspend
Switch Pins 21-22
22
21
Suspend LED
Pins 19-20
15