Updating The Bios; Recovering From A Post/Bios Update Failure; Power Management; Advanced Configuration And Power Interface (Acpi) Bios - Lenovo 10A4 Hardware Maintenance Manual

Updating the BIOS

When you install a new program, hardware device, or device driver, you might be informed to update the
BIOS. You can update the BIOS from your operating system or a flash update disc (supported only on some
models).
To update the BIOS, do the following:
1. Go to http://www.lenovo.com/drivers
2. Download the flash BIOS update driver for the operating system version or the ISO image version (used
to create a flash update disc). Then, download the installation instructions for the flash BIOS update
driver you download.
3. Print the installation instructions you download and follow the instructions to update the BIOS.

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. Open the computer cover. See "Removing the computer cover" on page 91.
3. Remove the hard disk drive. See "Replacing the primary hard disk drive" on page 122
4. Locate the Clear CMOS /Recovery jumper on the system board. See "Locating parts on the system
board" on page 89.
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 the maintenance position (pin 2 and pin
3).
7. Reconnect any cables that were disconnected and reinstall the PCI card if removed.
8. Close the computer cover and reconnect the power cords for the computer and monitor to electrical
outlets. See "Completing the parts replacement" on page 150.
9. Turn on the computer and then insert the POST and BIOS update (flash update) disc into the optical
drive. Wait a few minutes. Then, the recovery session begins. The recovery session will take two to three
minutes. During this time, a warning message will be displayed and no action is needed from you.
10. After the recovery session is completed, there will be no video, and your computer will automatically turn
off.
11. Repeat step 1 through step 5.
12. Move the Clear CMOS /Recovery jumper back to the standard position (pin 1 and pin 2).
13. Reconnect any cables that were disconnected and reinstall the PCI card if removed.
14. Close the computer cover and reconnect any cables that were disconnected.
15. Turn on the computer to restart the operating system.

Power management

Power management reduces the power consumption of certain components of the computer such as the
system power supply, processor, hard disk drives, and some monitors.

Advanced configuration and power interface (ACPI) BIOS

Being an ACPI BIOS system, the operating system is allowed to control the power management features of
the computer and the setting for Advanced Power Management (APM) BIOS mode is ignored. Not all
operating systems support ACPI BIOS mode.
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