Asus P9X79 LE - Manual (Page 37)

ASUS P9X79 LE 2-19
Chapter 2
2.2.6 Onboard LEDs
1. Standby Power LED
The Standby Power LED will light up once the system is connected to a power source.
3. BIOS Flashback switch
USB BIOS Flashback allows you to easily update the BIOS without entering the
BIOS or operating system. Just connect the USB storage device containing the BIOS
file to the USB port, press the BIOS Flashback switch, and the BIOS is updated
automatically.
Refer to section 2.3.10 USB BIOS Flashback for more information about BIOS_FLBK
switch.