Updating (flashing) the BIOS from a disc
This section provides instructions on how to update (flash) the BIOS from a disc.
System BIOS program updates are available at:
http://www.lenovo.com/support
To update (flash) the BIOS from a disc:
1. Make sure the computer is turned on. Insert the system program update (flash)
disc into the optical drive. The update begins.
2. When you are prompted to select a language, press the number on your
keyboard that corresponds to the language and then press Enter.
3. When prompted to change the serial number, press Y.
4. Type the seven-character serial number of your computer and then press Enter.
5. When prompted to change the machine type/model, press Y.
6. Type the seven-character machine type/model of your computer and then press
Enter.
7. Follow the instructions on the screen to complete the update.
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.
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 or open the
computer cover. See “Removing the computer cover” on page 86 or “Opening
the computer cover” on page 126.
3. Depending on your machine type, you might need to lay the computer on its
side for easier access to the system board or you might need to pivot the
optical drive bay assembly upward and or remove the hard disk drive to
access the system board, see “Accessing the system board components and
drives” on page 127.
4. Locate the Clear CMOS/Recovery jumper on the system board. See “Locating
parts on the system board” on page 89 or “Locating parts on the system
board” on page 129.
5. Remove any cables that impede 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.
8. Reinstall or close the computer cover and reconnect the power cords for the
computer and monitor to electrical outlets. See “Completing the FRU
replacement” on page 120 or “Completing the FRU replacement” on page 155.
9. Turn on the computer and the monitor, and then insert the POST/BIOS
update (flash update) disc into the optical drive.
10. Turn the computer off and back on again.
11. The recovery session will take two to three minutes. During this time you will
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.
12. Repeat steps 2 through 5.
380 Hardware Maintenance Manual
