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Updating (flashing) BIOS from your operating system
Note: Due to the constant improvements made to the Web site, Web page content
1. Go to http://www.lenovo.com/support.
2. Locate the downloadable files for your machine type as follows:
3. Print these instructions. This is very important since they are not on the screen
4. Click Back to return to the list of files. Carefully follow the printed instructions
Recovering from a POST/BIOS update failure
If the power to your computer is interrupted while POST/BIOS is being updated
(flash update), your computer might not restart correctly. If this happens, perform
the following procedure which is commonly called Boot-block Recovery.
10. Turn the computer off and back on again.
11. The recovery session will take two to three minutes. During this time you will
12. Repeat steps 2 through 5.
13. Move the jumper back to the standard position (pin 1 and pin 2).
14. Reconnect any cables that were disconnected. Refer to "Completing the parts
52
User Guide
(including the links referenced in the following procedure) is subject to
change.
a. In the Enter a product field, type your machine type and click Go →
Continue → Downloads and drivers.
b. Under the BIOS category, click Flash BIOS update.
c. Click the TXT file that contains the installation instructions for the flash
BIOS update (flash from the operating system version).
after the download begins.
to download, extract, and install the update.
1. Turn off the computer and any attached devices, such as printers, monitors,
and external drives.
2. Unplug all power cords from electrical outlets, and open the computer cover.
Refer to "Opening the computer cover" on page 12.
3. Access the system board. Refer to "Accessing the system board components
and drives" on page 13.
4. Locate the Clear CMOS/Recovery jumper on the system board. Refer to
"Locating parts on the system board" on page 10.
5. Remove any cables that might prevent your access to the Clear
CMOS/Recovery jumper.
6. Move the jumper from the standard position (pin 1 and pin 2) to pin 2 and
pin 3.
7. Reconnect any cables that were disconnected. Refer to "Completing the parts
replacement" on page 35.
8. Close the computer cover and reconnect the power cords for the computer
and monitor to electrical outlets.
9. Turn on the computer and the monitor, and then insert the POST/BIOS
update (flash update) disc into the optical drive.
hear a series of beeps. After the update session is completed, there will be no
video, 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.
replacement" on page 35.
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