User’s Manual

ASUS PRIME B450M-A II

1-5

• Hard disk drive activity LED (2-pin +HDD_LED-)

This 2-pin header is for the HDD Activity LED. Connect the HDD Activity LED cable to

this header. The HDD LED lights up or flashes when data is read from or written to the

HDD.

• Power button/Soft-off button (2-pin PWR_BTN)

This header is for the system power button.

• Reset button (2-pin RESET)

This 2-pin header is for the chassis-mounted reset button for system reboot without

turning off the system power.

18. BIOS FlashBack

LED

The FlashBack™ LED lights up or blinks to indicate the status of the

BIOS FlashBack™.

Scan the QR code for more information on BIOS FlashBack

function.