Updating (Flashing) Bios From Your Operating System; Recovering From A Post/Bios Update Failure - Lenovo ThinkCentre A52 8157 User Manual

Updating (flashing) BIOS from your operating system

Note: Due to constant improvements being made to the Lenovo Web site, Web
1. From your browser, type http://www.lenovo.com/think/support in the address
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. From your browser, Click Back to return to the list of files. Carefully follow the

Recovering from a POST/BIOS update failure

If 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 (also known as a Boot-block Recovery):
10. Repeat steps 2 through 4.
11. Replace the Clear CMOS/Recovery jumper to its original position.
12. Replace any adapters that were removed.
13. Replace the cover and reconnect any cables that were disconnected.
14. Turn on the computer to restart the operating system.
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User Guide
page content (including the links referenced in the following procedure) is
subject to change.
field and press Enter.
a. In the Use Quick path field, type in your machine type and click Go.
b. Under Browse by product, click Continue.
c. Under Important information, click Downloads and drivers.
d. Under the BIOS category, click Flash BIOS update.
e. Click the .txt file that contains the Installation instructions for flash BIOS
update (Flash from operating system version).
after the download begins.
printed instructions 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 remove the cover. See
"Removing the cover" on page 10.
3. Locate the Clear CMOS/Recovery jumper on the system board. See
"Identifying parts on the system board" on page 14.
4. If necessary, refer to Installing adapters to remove any adapters that impede
access to the Clear CMOS/Recovery jumper.
5. Move the jumper from the standard position (pins 1 and 2) to pins 2 and 3.
6. Replace the cover. See "Replacing the cover and connecting the cables" on
page 27.
7. Reconnect the power cords for the computer and monitor to electrical outlets.
8. Insert the POST/BIOS update (flash) diskette into drive A, and turn on the
computer and the monitor.
9. After the update session is completed, there will be no video and the series of
beeps will end and the system will automatically turn off. Remove the
diskette from the diskette drive, and turn off the computer and monitor.