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 the 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. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Remove the computer cover. See “Removing the computer cover” on page 81.
3. Locate the Clear CMOS /Recovery jumper on the system board. See “System board parts and
connectors” on page 72.
4. Move the jumper from the standard position (pin 1 and pin 2) to the maintenance position (pin 2 and
pin 3).
5. Install the computer cover and reconnect all cables and power cords that were disconnected. See
“Completing the parts replacement” on page 111.
6. Repeatedly press and release the F12 key when turning on the computer. When the
Startup Device
Menu
opens, release the F12 key.
7. Insert the POST/BIOS update (flash) disc into the optical drive. Then, select the optical drive as the
startup device and press Enter. The recovery session begins.
Note:
The recovery session will take two to three minutes. During this time you will hear a series
of beeps.
8. After the recovery session is completed, 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.
9. Repeat steps 1 through 3.
10. Move the Clear CMOS /Recovery jumper back to the standard position (pin 1 and pin 2).
11. Install the computer cover and reconnect all cables and power cords that were disconnected. See
“Completing the parts replacement” on page 111.
12. Turn on the computer to restart the operating system.
Chapter 10
.
Additional Service Information
115
Summary of Contents for ThinkCentre 3512
Page 2: ......
Page 8: ...2 ThinkCentre Hardware Maintenance Manual ...
Page 15: ...Chapter 2 Safety information 9 ...
Page 19: ...Chapter 2 Safety information 13 ...
Page 20: ...1 2 14 ThinkCentre Hardware Maintenance Manual ...
Page 21: ...1 2 Chapter 2 Safety information 15 ...
Page 26: ...1 2 20 ThinkCentre Hardware Maintenance Manual ...
Page 27: ...1 2 Chapter 2 Safety information 21 ...
Page 30: ...24 ThinkCentre Hardware Maintenance Manual ...
Page 34: ...28 ThinkCentre Hardware Maintenance Manual ...
Page 60: ...54 ThinkCentre Hardware Maintenance Manual ...
Page 70: ...64 ThinkCentre Hardware Maintenance Manual ...
Page 75: ...Figure 3 Locating major FRUs and CRUs Chapter 8 Locations 69 ...
Page 85: ...Figure 12 Removing the frame stand Chapter 9 Replacing FRUs 79 ...
Page 127: ......
Page 128: ......