Supermicro A+ Server AS-1124US-TNRP User Manual page 99

2. While the system is turned off, open the chassis and locate the internal USB 3.0 Type-A
port on the motherboard. Insert the USB device that contains the new BIOS binary image,
SUPER.ROM..
3. Power on the system.
4. After the system is turned on, the system will enter the BIOS Recovery menu. Select
"Proceed with flash update" to start the BIOS recovery process. Caution: Do not interrupt
this process before it finishes.
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Chapter 6: UEFI BIOS