Updating (Flashing) The Bios From Your Operating System; Recovering From A Post/Bios Update Failure - Lenovo ThinkCentre M72e Hardware Maintenance Manual

Note: You can download a self-starting bootable disc image (known as an ISO image) with the system
program updates to create a system-program-update disc. Go to:
http://www.lenovo.com/support
To update (flash) the BIOS from a disc, do the following:
1. Turn off your computer.
2. Repeatedly press and release the F12 key when turning on the computer. When the Startup Device
Menu window opens, release the F12 key.
3. From the Startup Device Menu window, select the desired optical drive as the startup device. Then,
insert the disc into this optical drive and press Enter. The update begins.
4. When prompted to change the serial number, it is suggested that you do not make this change by
pressing N. However, if you do want to change the serial number, press Y, then type in the serial number
and press Enter.
5. When prompted to change the machine type and model, it is suggested that you do not make this
change by pressing N. However, if you do want to change the machine type and model, press Y, then
type in the machine type and model and press Enter.
6. Follow the instructions on the screen to complete the update. After the update is completed, remove the
disc from the optical drive.

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. Click Download Drivers & Software.
3. Click Use Quick Path.
4. Type the 4-digit machine type for your computer in the Quick Path field and then click Find My Product.
5. Click BIOS.
6. Locate the BIOS version that you want to download.
7. Click Click for files. All available files will be displayed.
8. Click the link for the readme file that contains the instructions for updating (flashing) the BIOS from
your operating system.
9. Print these instructions. This is very important because these instructions will not be displayed on
the screen after the download begins.
10. 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 and BIOS is being updated, your computer
might not restart correctly. If this happens, perform the following procedure to recover from the POST and
BIOS update failure. This procedure is 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 77.
3. Locate the Clear CMOS /Recovery jumper on the system board. See "Locating parts on the system
board" on page 72.
128
ThinkCentre Hardware Maintenance Manual