Lenovo 70B4, User Manual And Hardware Maintenance Manual

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Defaults on the Save & Exit menu in the Setup Utility program to restore the user default values after
updating the BIOS. In this case, you can keep your previous BIOS settings and do not need to reconfigure
the settings after updating the BIOS. You also can record your specific BIOS settings before updating the
BIOS for an easier reconfiguration in the new BIOS version.
To update (flash) the BIOS, do the following:
1. Go to http://www.lenovo.com/drivers and follow the instructions on the Web page to locate the BIOS
update package.
2. Download the BIOS update package and the TXT file that contains installation instructions.
3. Print the TXT file and follow the instructions to update (flash) the BIOS.
4. Check and reconfigure the BIOS settings for your specific needs based on your note or refer to “Using
the Setup Utility program” on page 61 after the BIOS update process is completed.
Recovering from a BIOS update failure
If the power to your server is interrupted while the BIOS is being updated, your server might not restart
correctly. If this happens, perform the following procedure to recover from the BIOS update failure.
Note: If the operating system of your server is installed under EFI mode, you need to reinstall the operating
system after recovering the BIOS.
To recover from a BIOS update failure, do the following:
1. Go to http://www.lenovo.com/drivers and follow the instructions on the Web page to download a BIOS
update package. Then, put the amiboot.rom file contained in the package into the root directory of
a bootable USB key.
2. Remove all media from the drives and turn off all attached devices and the server. Then, disconnect all
power cords from electrical outlets and disconnect all cables that are connected to the server.
3. Remove the server cover. See “Removing the server cover” on page 85.
4. Locate the BIOS recovery switch on the system board. See “System board jumpers and switches” on
page 52. Then, remove any parts and disconnect any cables that might impede your access to the
switch.
5. Move the BIOS recovery switch from the default off position to the on position.
6. Reinstall any parts and reconnect any cables. Then, reinstall the server cover. See “Completing the
parts replacement” on page 205.
7. Connect the server to an ac power source, and then start the server from the bootable USB key that
contains the amiboot.rom file. The recovery process starts. After the recovery process is completed,
your server will automatically turn off.
8. Repeat step 2 through step 4.
9. Move the BIOS recovery switch back to the off position.
10. Repeat step 6.
11. Connect the server to an ac power source and turn on the server. The BIOS settings recover to the
factory default settings. You need to check and configure the BIOS settings for your specific needs. See
“Using the Setup Utility program” on page 61.
Note: If you cannot recover the BIOS after using the instructions in this topic, the BIOS read-only memory
(ROM) might be damaged and you need to replace the system board. Contact the Lenovo Customer
Support Center.
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ThinkServer TD340 User Guide and Hardware Maintenance Manual