System Panel Connector - Asus M4A77TD - Motherboard - ATX User Manual

4. System panel connector (20-8 pin PANEL)
This connector supports several chassis-mounted functions.
M4A77TD System panel connector
• 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.
1-24
PANEL
M4A77TD
PLED SPEAKER
PIN 1
IDE_LED PWRSW RESET
* Requires an ATX power supply
Chapter 1: Product introduction