User's Manual

ASUS P8Z77-M PRO
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Chapter 2
2.3.10 USB BIOS Flashback
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 le to the USB
port, press the BIOS Flashback switch, and the BIOS is updated automatically.
1. Do not disconnect the USB ash drive or power system, or move the CLRTC jumper
during the BIOS updating process. Doing so will interrupt the BIOS updating process.
In case of interruption, follow the steps again to update the BIOS.
2. If FLBK_LED flashes for five seconds and turns into a stable light, this indicates
that USB BIOS Flashback is not working properly due to improper USB ash drive
connection, BIOS le name error, or incompatible BIOS le format. If this happens,
restart the syetem.
3. BIOS updating poses some risks. If the BIOS program is damaged during the updating
process and the system fails to reboot, please contact your local ASUS Service Center
for assistance
1. Download the USB BIOS Flashback from the ASUS website at www.asus.com and
save it to the root directory of your USB ash drive.
2. Connect the USB ash drive to the bottom USB3.0 port at the rear panel.
3. Press the USB Flashback switch for three seconds until the FLBK_LED ashes. The
FLBK_LED goes out when the BIOS update is completed.