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How to Recover from a Failed BIOS Flash
There are 2 separate methods to recover a AMI based BIOS. Depending on the particular series of motherboard that you have, you will need to follow one of the 2 methods listed below. Each method is unique for their own series of products. Each method must match the series of motherboard that needs to be recovered. Failure to follow the exact method will result in a failure to recover from a failed BIOS issue.

S7xxx Series Motherboards

This section applies only to the S7xxx series of TYAN motherboards. Using this method, a user can recover from a situation where the motherboard will no longer POST due to an incomplete BIOS flash or other related corruption.

You will need the following:

- A FAT32 formatted USB flash drive
- amiboot.exe - this command line utility is packaged with this documentation
- An internet connection - to be able to download the motherboard BIOS
- Access to a working computer

Download the latest BIOS for the motherboard from www.tyan.com. In this example, an s7016 is used:
 
Unzip the BIOS download and examine the size of the BIOS file:
Make note of the size of the BIOS file. In this example, the BIOS file is named 7016V300.ROM. However keep in mind that this will change depending on which motherboard and what BIOS version you have selected.
Create amiboot.rom.
If the BIOS file (7016V300.ROM, in the above example) is already 2,048 KB (2MB) in size, then simply rename the file to ‘AMIBOOT.ROM’. Once you have renamed the file, proceed to step 4.

If the BIOS file (7016V300.ROM in the above example) is 4,096 KB (4MB) in size, you will need to use amiboot.exe to extract the 2MB recovery package from the file. To do this, place the BIOS file and amiboot.exe into the same directory. Open a command prompt window and navigate to the directory that contains these files and enter the following command: amiboot [filename]. In this example, the command was ‘amiboot 7016v300.rom’. This will create a new file named AMIBOOT.ROM.
Place the newly created amiboot.rom onto a USB flash drive.
The amiboot.rom file that was created in step 3 must be placed on a fat32 formatted USB flash drive, in the root directory. Note: It does not matter if other files are present on the flash drive.
Plug the USB flash drive into a USB port on the affected motherboard and power the system on.
If the motherboard will not POST due to a corrupted BIOS, it will automatically search for a USB flash drive and automatically begin the recovery process if it can locate AMIBOOT.ROM. The entire process is automatic and the system will restart when the flash process has been completed:
The motherboard BIOS will now have been flashed to the version contained within the amiboot.rom file. The motherboard will now be able to POST and will function properly.
S8xxx Series Motherboards
This section applies only to the S8xxx series of TYAN motherboards. Using this method, a user can recover from a situation where the motherboard will no longer POST due to an incomplete BIOS flash or other related corruption.
You will need the following:

- A FAT32 formatted USB flash drive
- An internet connection – to be able to download the motherboard BIOS
- Access to a working computer
Download the latest BIOS for the motherboard from tyan.com. In this example, an S8230 is used:
Unzip the BIOS and rename it to AMIBOOT.ROM.
Locate the BIOS file in the unzipped folder and re-name it to AMIBOOT.ROM. In this example, the name of the file was 8230v200.rom.
Place the newly renamed AMIBOOT.ROM onto a flash drive.
The BIOS file that was renamed in step 2 must be placed in the root directory of a FAT32 formatted USB flash drive. Note: It does not matter if other files are present on the flash drive.
Plug the USB flash drive into a USB port on the affected motherboard and power the system on.
If the motherboard will not POST due to a corrupt BIOS, it will automatically search for a USB flash drive and automatically begin the recovery process if it can locate AMIBOOT.ROM. The entire process is automatic and the system will restart when the flash process has been completed:
The motherboard BIOS will now have been flashed to the version contained within the amiboot.rom file. The motherboard will now be able to POST and will function properly.