Updating (Flashing) Bios From A Disc; Recovering From A Post/Bios Update Failure - Lenovo 8820ANU Hardware Maintenance Manual

3. Levels 1 and 2 Support
To update (flash) the BIOS, see "Updating (flashing) BIOS from a disc" on page 334.

Updating (flashing) BIOS from a disc

This section provides instructions on how to update (flash) BIOS from a disc. System BIOS program updates
are available at:
http://www.lenovo.com/support
To update (flash) BIOS from a disc:
1. Make sure the optical drive you want to use is set as the first boot device in the startup device sequence.
See "Selecting a startup device" on page 45.
2. Make sure the computer is turned on. Then, insert the system program update (flash) disc into the
optical drive.
3. Turn the computer off and back on again. The update begins.
4. When prompted to change the serial number, press Y.
5. Type in the twenty character serial number of your computer and then press Enter.
6. When prompted to change the machine type/model, press Y.
7. Type in the twenty character machine type/model of your computer and then press Enter.
8. 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 open the computer cover. See "Opening the
computer cover" on page 71.
3. Locate the Clear CMOS/Recovery jumper on the system board. See "Locating parts on the system
board" on page 70.
4. Remove any cables that impede access to the Clear CMOS/Recovery jumper.
5. Move the jumper from the standard position (pin 1 and pin 2) to pins 2 and pin 3.
6. Reconnect any cables that were disconnected. See "Completing the FRU replacement" on page 89.
7. Close the computer cover and reconnect the power cords for the computer and monitor to electrical
outlets.
8. Turn on the computer and the monitor, and then insert the POST/BIOS update (flash update) disc into
the optical drive.
9. Turn the computer off and back on again.
10. 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.
11. Repeat steps 2 through 4.
12. Move the jumper back to the standard position (pin 1 and pin 2).
13. Reconnect any cables that were disconnected. See "Completing the FRU replacement" on page 89.
14. Close the computer cover and reconnect the power cords for the computer and monitor to electrical
outlets.
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ThinkCentre Hardware Maintenance Manual