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Chapter 1: Product introduction
This connector supports several chassis-mounted functions.
System power LED
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
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 flashes when data is
read from or written to the HDD.
System warning speaker
This 4-pin connector is for the chassis-mounted system warning speaker. The
speaker allows you to hear system beeps and warnings.
This 2-pin connector is for the system power button. Pressing the power
button turns the system ON or puts the system in SLEEP or SOFT-OFF
mode depending on the BIOS settings. Pressing the power switch for more
than four seconds while the system is ON turns the system OFF.
This 2-pin connector is for the chassis-mounted reset button for system
reboot without turning off the system power.
M3A78-EM System Panel Connector