Asus PCH DR User Guide - Page 50

System Power LED 3-pin PLED

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14. System panel connector (20-pin PANEL1) This connector accommodates several system front panel functions. POWERLED+ GND POWERLEDMLED+ MLEDNC +5V GND GND SPKROUT HDLED+ HDLEDNMIBTN# GND POWERBTN# GND NC RESETBTN# GND PANEL1 PCH-DR PCH-DR System Panel Connector • System Power LED (3-pin PLED) This lead connects to the system power LED. The LED lights up when you turn on the system power, and blinks when the system is in sleep mode. • Message LED (2-pin MLED) This lead connects to the message LED cable on the front panel and indicates the booting status. The LED blinks when the system is in the boot process until the operating system is loaded. • System warning speaker (4-pin SPEAKER) This lead connects to the case-mounted speaker and allows you to hear system beeps and warnings. • Hard disk activity (2-pin HD_LED) This lead connects the HDD LED cable. The read or write activities of the device connected to the any of IDE connectors cause the IDE LED to light up. • Power switch / Soft-off switch (2-pin PWRBTN) This lead connects a switch that controls the system power. Pressing the power switch turns the system between ON and SLEEP, or ON and SOFT OFF, depending on the BIOS or OS settings. Pressing the power switch while in the ON mode for more than 4 seconds turns the system OFF. 2-32 Chapter 2: Hardware information

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2-32
Chapter 2: Hardware information
14. System panel connector (20-pin PANEL1)
This connector accommodates several system front panel functions.
PCH-DR
PCH-DR System Panel Connector
PANEL1
MLED-
GND
NC
POWERBTN#
+5V
GND
GND
NC
POWERLED+
HDLED+
GND
HDLED-
POWERLED-
MLED+
NMIBTN#
GND
RESETBTN#
SPKROUT
GND
•
System Power LED (3-pin PLED)
This lead connects to the system power LED.
The LED lights up when
you turn on the system power, and blinks when the system is in sleep
mode.
•
Message LED (2-pin MLED)
This lead connects to the message LED cable on the front panel and
indicates the booting status. The LED blinks when the system is in the
boot process until the operating system is loaded.
•
System warning speaker (4-pin SPEAKER)
This lead connects to the case-mounted speaker and allows you to
hear system beeps and warnings.
•
Hard disk activity (2-pin HD_LED)
This lead connects the HDD LED cable. The read or write activities of
the device connected to the any of IDE connectors cause the IDE LED
to light up.
•
Power switch / Soft-off switch (2-pin PWRBTN)
This lead connects a switch that controls the system power.
Pressing
the power switch turns the system between ON and SLEEP, or ON and
SOFT OFF, depending on the BIOS or OS settings.
Pressing the
power switch while in the ON mode for more than 4 seconds turns the
system OFF.