Microsoft System Board Hardware Installation, Keylock Power/Standby LED and Keylock Connector

Hardware Installation

KEYLOCK: Power/Standby LED and Keylock Connector

Use pins 24 to 26 to connect to the Power/Standby LED. This LED will light when the system’s power is on and blinks when the system enters the Suspend mode.

Use pins 27 to 28 to connect to the keyboard lock (located on the front panel of the system chassis) for locking the keyboard.

	Pin	Pin Assignment
ATX-LED	1	ATX Power
(ATX 5VSB Standby LED)	2	Ground
	3	N. C.
HD-LED	4	HDD LED Power
(Primary/Secondary IDE LED)	5	HDD
	6	N. C.
G-LED	7	Green LED Power
(Green LED)	8	Green
	9	N. C.
ATX-SW	10	PWRBT
(ATX power switch)	11	Ground
	12	N. C.
G-SW	13	SMI
(Green switch)	14	Ground
	15	N. C.
RESET	16	H/W Reset
(Reset switch)	17	Ground
	18	N. C.
SPEAKER	19	Speaker Data
(Speaker connector)	20	N. C.
	21	Ground
	22	Speaker Power
	23	N. C.
KEYLOCK	24	LED Power
(Power/Standby LED and	25	N.C.
Keylock connector)	26	Standby Signal
	27	Keylock
	28	Ground
		Use pins 24-26 for
		the Power/Standby
		LED.

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