1.10.2 Internal connectors Asus prime Asus M3A78-EM

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Chapter 1: Product introduction

14.. System.panel.connector.(20-8.pin.PANEL)
 

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.

• 

Power/Soft-off button 

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.

• 

Reset button  

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

R

M3A78-EM

PANEL

PLED

-

+5

V

Speake

r

SPEAKER

PLED

Ground

Reset

Reset

Ground Ground

PLED

+

IDE_LED-

IDE_LED+

+IDE_LED

PW

R

Ground

PWRSW