•Hard disk drive activity LED (Red 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 flashes when data is read from or written to the HDD.
•System warning speaker (Orange 4-pin SPEAKER)
This 4-pin connector is for the chassis-mounted system warning speaker. The speaker allows you to hear system beeps and warnings.
•ATX power button/soft-off button (Yellow 2-pin PWRSW)
This 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 (Blue 2-pin RESET)
This 2-pin connector is for the chassis-mounted reset button for system reboot without turning off the system power.
•Message button (Brown 2-pin MLED)
This 2-pin connector is for the message LED which indicates the booting status. The LED blinks when the system is in the booting process until the operating system is loaded. Connect the message LED cable to this connector.
•Non-Masked Interrupt button (Light blue 2-pin MNIBTN)
This 2-pin connector is for the non-masked interrupt initiation.