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Chapter 1: Product introduction
4. System panel connector (10-1 pin PANEL)
This connector supports several chassis-mounted functions.
• System power LED (2-pin PLED)
This 2-pin connector is for the system power LED. Connect the chassis power LED
cable to this connector. The system power LED lights up when you turn on the system
power, and blinks when the system is in sleep mode.
• Hard disk drive activity LED (2-pin IDE_LED)
This 2-pin connector is for the HDD Activity LED. Connect the HDD Activity LED cable
to this connector. The IDE LED lights up or ashes when data is read from or written to
the HDD.
• ATX power button/soft-off button (2-pin PWRSW)
This connector is for the system power button.
• Reset button (2-pin RESET)
This 2-pin connector is for the chassis-mounted reset button for system reboot without
turning off the system power.
B75M-A
PIN 1
PWR BTN
PLED+
PLED-
PWR
GND
HD_LED+
HD_LED-
Ground
HWRST#
(NC)
F_PANEL
PWR LED
+HD_LED RESET
B75M-A System panel connector