EVGA Z790 CLASSIFIED User Manual page 103

EVGA Z790 CLASSIFIED (121-RL-E798)
The flash process may take up to 7 minutes, and the motherboard will automatically
reboot. If you have not installed a CPU and at least one 8-pin CPU power connector,
the POST LED will stop at an error code. If this occurs, turn off the motherboard and
install any remaining hardware components before booting again.
Flashing the BIOS without CPU POST Code Errors
Flashing the BIOS without a CPU is relatively straightforward, and this includes the
kinds of problems you may run into while using the BIOS Update function.

Unusual POST Codes – If you see unusual POST Codes, such as "2.5" or
"1.2", this may indicate a couple of problems:
o Make sure that you hold the BIOS Update button down long enough
to begin the flash process.
o If you have successfully flashed the BIOS at least once without a CPU
installed, please try booting the motherboard with a supported CPU
and the rest of your hardware installed. Eventually, you must test with
all hardware installed to learn more about an error code.

E1 – USB disk is still being read/unable to be read correctly. If this continues to
occur, try reformatting the USB disk and/or trying a different USB disk.

E2 – USB disk cannot be detected. Make sure the USB disk is connected to the
USB2.0 Type-A port on the motherboard.

E3 – USB Disk is not in FAT32 format.

E4 – BIOS file is missing or not found. Make sure the BIOS file is named
correctly and placed in the root of the USB disk.

E9 – BIOS file is incorrect. Make sure the BIOS file is named correctly and is
for the correct motherboard.
Hot-Flashing a BIOS
Hot-flashing is usually suggested to restore a BIOS after a bad flash and prevents you
from booting. Here are the recommended steps using the BIOS Update button:
1. Prepare your FAT32 USB disk, place a BIOS file named EVGAE798.bin into
the root of the disk. Plug the USB disk into the USB to SPI port.
2. Boot into Windows or BIOS on a working BIOS chip.
3. Hold the Power Button down to turn off the system, but don't turn off your
power supply.
4. Move the BIOS Switch to the BIOS you want to hot-flash.
5. Hold down the BIOS Update for several seconds until the flash process starts.
6. The flash may take up to 7 minutes. The system will restart once finished.
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