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4. When prompted to change the serial number, it is suggested that you press N.
However, if you do want to change the serial number, press Y, then type in the
serial number and press Enter.
5. When prompted to change the machine type and model, it is suggested that
you press N. However, if you do want to change the machine type and model,
press Y, then type in the machine type and model and press Enter.
6. Follow the instructions on the screen to complete the update. After the update
is completed, remove the disc from the optical drive.
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. Do the following to locate the downloadable files for your machine type:
a. In the Enter a product number field, type your machine type and click Go.
b. Click Downloads and drivers.
c. Select BIOS from the Refine results drop-down list box to easily locate all
the BIOS related links.
d. Click the BIOS update link.
3. Click the TXT file that contains the instructions for updating (flashing) the BIOS
from your operating system.
4. Print these instructions. This is very important because these instructions will
not be displayed on the screen after the download begins.
5. Follow the printed instructions to download, extract, and install the update.
Recovering from a POST/BIOS update failure
If 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 Boot-block Recovery.
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 remove the computer
cover. See “Removing the computer cover” on page 13.
3. Remove the front bezel. See “Removing and reinstalling the front bezel” on
page 15.
4. Remove the PCI card holder. See “Removing and reinstalling the PCI card
holder” on page 16.
5. Locate the Clear CMOS /Recovery jumper on the system board. See “Locating
parts and connectors on the system board” on page 11.
6. Remove any cables that impede access to the Clear CMOS /Recovery jumper.
7. Move the jumper from the standard position (pin 1 and pin 2) to the
maintenance position (pin 2 and pin 3).
8. Reinstall any parts and reconnect any cables that have been removed or
disconnected.
64 User Guide