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 43.
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 “Updating
(flashing) the BIOS from a disc” on page 365.
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 program.
– See
BIOS Revision Level
on the Main setup screen.
• 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 “Updating (flashing) the BIOS from a disc” on page 365.
Updating (flashing) the BIOS from a disc
This section provides instructions on how to update (flash) the BIOS from a disc.
© Copyright Lenovo 2011, 2012
365
Summary of Contents for ThinkCentre M81
Page 6: ...iv ThinkCentre Hardware Maintenance Manual ...
Page 15: ...Chapter 2 Safety information 9 ...
Page 16: ... 18 kg 37 lb 32 kg 70 5 lb 55 kg 121 2 lb 10 ThinkCentre Hardware Maintenance Manual ...
Page 20: ...14 ThinkCentre Hardware Maintenance Manual ...
Page 21: ...1 2 Chapter 2 Safety information 15 ...
Page 22: ...1 2 16 ThinkCentre Hardware Maintenance Manual ...
Page 28: ...22 ThinkCentre Hardware Maintenance Manual ...
Page 29: ...1 2 Chapter 2 Safety information 23 ...
Page 33: ...Chapter 2 Safety information 27 ...
Page 34: ...1 2 28 ThinkCentre Hardware Maintenance Manual ...
Page 38: ...32 ThinkCentre Hardware Maintenance Manual ...
Page 78: ...72 ThinkCentre Hardware Maintenance Manual ...
Page 168: ...162 ThinkCentre Hardware Maintenance Manual ...
Page 370: ...364 ThinkCentre Hardware Maintenance Manual ...
Page 374: ...368 ThinkCentre Hardware Maintenance Manual ...
Page 379: ......
Page 380: ...Part Number 0A74545 Printed in USA 1P P N 0A74545 0A74545 ...