Lenovo ThinkCentre Edge 3484, Hardware Maintenance Manual

Page: 161 / 170

Chapter 11. Additional service information
This chapter provides additional information that the service representative might find helpful.
Security features
Security features in this section include the following:
• Passwords
• Vital Product Data
Hardware-controlled passwords
Use the Setup Utility program to set the hardware controlled passwords. For more information about
passwords, see “Using passwords” on page 55.
Operating system password
Note: This section applies only to computer models that have an operating system preinstalled from Lenovo.
An operating system password is very similar to a power-on password and denies access to the computer by
an unauthorized user when the password is activated. The computer is unusable until the correct password
is entered and recognized by the computer.
Vital Product Data
Each computer has a unique Vital Product Data (VPD) code stored in the nonvolatile memory on the system
board. After you replace the system board, the VPD must be updated. To update the VPD, see “Flash
update procedures” on page 157.
BIOS levels
An incorrect level of BIOS can cause false errors and unnecessary FRU replacement. Use the following
information to determine the current level of BIOS installed in the computer, the latest BIOS available for the
computer, and where to obtain the latest level of BIOS.
• To determine the current Level of BIOS:
– Start the Setup Utility.
– Select Standard CMOS Features.
• Sources for obtaining the latest level BIOS available
1. Lenovo support web site:
http://www.lenovo.com/support/
2. Lenovo Customer Support Center
3. Levels 1 and 2 Support
To update (flash) the BIOS, see “Flash update procedures” on page 157.
Note: BIOS settings vary by operating system. Change the BIOS settings before installing a new operating
system. See “Changing the BIOS settings before installing a new operating system” on page 59.
Flash update procedures
This section details how to flash (update) the BIOS.
© Copyright Lenovo 2012 157