Updating (Flashing) Bios From A Diskette; Recovering From A Post/Bios Update Failure - Lenovo ThinkCentre 3656 Hardware Maintenance Manual

Updating (flashing) BIOS from a diskette

1. Insert a system program update (flash) diskette into the diskette drive. system
2. Turn on the computer. If it is already on, you must turn it off and back on. The
3. 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.
10. The recovery session will take two to three minutes. During this time you will
11. Repeat steps 2 through 5.
12. Replace the Clear CMOS/Recovery jumper to the standard position (pin 1 and
13. Reconnect any cables that were disconnected. Refer to "Completing the FRU
14. Close the computer cover and reconnect the power cords for the computer
15. Turn on the computer to restart the operating system.
474
Hardware Maintenance Manual
program updates are available at http://www.lenovo.com/support on the
World Wide Web.
update begins.
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. Refer to "Removing the cover" on page 86.
3. Access the system board. Refer to "Locating parts on the system board" on
page 88.
4. Locate the Clear CMOS/Recovery jumper on the system board. Refer to
"Locating parts on the system board" on page 88.
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. Refer to "Completing the FRU
replacement" on page 112.
8. Close the computer cover and reconnect the power cords for the computer
and monitor to electrical outlets.
9. Insert the POST/BIOS update (flash) floppy diskette or CD-ROM into the
drive, and turn on the computer and the monitor.
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 diskette from the diskette drive or disc from the optical drive.
pin 2).
replacement" on page 112.
and monitor to electrical outlets.