Updating (flashing) the BIOS from your operating system
Note: Because Lenovo makes constant improvements to its Web sites, the Web page contents are subject to change without notice, including the contents referenced in the following procedure.
To update (flash) the BIOS from your operating system, do the following:
1.Go to http://www.lenovo.com/support.
2.Click Download Drivers & Software.
3.Click Use Quick Path.
4.Type the
5.Click BIOS.
6.Locate the BIOS version that you want to download.
7.Click Click for files. All available files will be displayed.
8.Click the link for the readme file that contains the instructions for updating (flashing) the BIOS from your operating system.
9.Print these instructions. This is very important because these instructions will not be displayed on the screen after the download begins.
10.Follow the printed instructions to download, extract, and install the update.
Recovering from a POST/BIOS update failure
If the power to your computer is interrupted while the POST/BIOS is being updated (flash update), your computer might not restart correctly. If this happens, perform the following procedure commonly called
1.Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2.Remove the computer cover. See “Removing the computer cover” on page 74.
3.Locate the Clear CMOS /Recovery jumper on the system board. See “Locating parts on the system board” on page 71.
4.Move the jumper from the standard position (pin 1 and pin 2) to the maintenance position (pin 2 and pin 3).
5.Install the computer cover and reconnect all cables and power cords that were disconnected. See “Completing the FRU installation” on page 109.
6.Repeatedly press and release the F12 key when turning on the computer. When the Startup Device Menu opens, release the F12 key.
7.Insert the POST/BIOS update (flash) disc into the optical drive. Then, select the optical drive as the startup device and press Enter. The recovery session begins.
Note: The recovery session will take two to three minutes. During this time you will hear a series of beeps.
8.After the recovery session is completed, the series of beeps will end, and the system will automatically turn off. Remove the disc from the optical drive before the system completely turns off.
9.Repeat steps 1 through 3.
10.Move the Clear CMOS /Recovery jumper back to the standard position (pin 1 and pin 2).
11.Install the computer cover and reconnect all cables and power cords that were disconnected. See “Completing the FRU installation” on page 109.
12.Turn on the computer to restart the operating system.
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