Table Of Contents - Lenovo THINKCENTRE 2491 Hardware Maintenance Manual

Contents
Chapter 1. About this manual . . . . . . 1
Important safety information . . . . . . . . . .
Important information about replacing RoHS
compliant FRUs . . . . . . . . . . . . . . .
Chapter 2. Safety information . . . . . . 3
General safety . . . . . . . . . . . . . . . .
Electrical safety . . . . . . . . . . . . . . .
Voltage-selection switch . . . . . . . . . . . .
Safety inspection guide . . . . . . . . . . . .
Handling electrostatic discharge-sensitive
devices . . . . . . . . . . . . . . . . . .
Grounding requirements . . . . . . . . . . . .
Safety notices (multi-lingual translations) . . . . .
Chapter 3. General information . . . . 29
Lenovo Welcome. . . . . . . . . . . . . .
Lenovo ThinkVantage Tools
Lenovo ThinkVantage Toolbox . . . . . . . .
SimpleTap . . . . . . . . . . . . . . . .
Lenovo Solution Center . . . . . . . . . . .
ThinkVantage Productivity Center . . . . . . .
Additional information resources
Specifications . . . . . . . . . . . . . . .
Chapter 4. General checkout . . . . . 33
Checking for power problems. . . . . . . . .
Problem determination tips . . . . . . . . . .
Chapter 5. Diagnostics . . . . . . . . 37
Lenovo ThinkVantage Toolbox . . . . . . . .
Lenovo Solution Center . . . . . . . . . . .
PC-Doctor for DOS . . . . . . . . . . . . .
Creating a diagnostic disc . . . . . . . .
Running the diagnostic program from a
diagnostic disc . . . . . . . . . . . . .
Navigating through the diagnostics
programs . . . . . . . . . . . . . . .
Running tests . . . . . . . . . . . . .
Viewing the test log . . . . . . . . . . .
Chapter 6. Using the Setup Utility
program . . . . . . . . . . . . . . . . 41
Starting the Setup Utility program . . . . . . .
Viewing and changing settings . . . . . . . .
Using passwords. . . . . . . . . . . . . .
Password considerations . . . . . . . . .
Power-On Password
© Copyright Lenovo 2011, 2012
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Administrator Password . . . . . . . . .
1 Hard Disk Password. . . . . . . . . . .
Setting, changing, and deleting a password .
1
Erasing lost or forgotten passwords (clearing
CMOS) . . . . . . . . . . . . . . . .
Enabling or disabling a device
3
Selecting a startup device . . . . . . . . . .
3
Selecting a temporary startup device . . . .
5
Selecting or changing the startup device
5 sequence . . . . . . . . . . . . . . .
Smart performance choices . . . . . . . . .
6
Exiting from the Setup Utility program . . . . .
6
Chapter 7. Symptom-to-FRU index . . 47
6
Hard disk drive boot error . . . . . . . . . .
Diagnostic error codes . . . . . . . . . . .
29
Beep symptoms . . . . . . . . . . . . . .
29
POST error codes . . . . . . . . . . . . .
29
Miscellaneous error messages . . . . . . . .
29
Undetermined problems . . . . . . . . . . .
30
Chapter 8. Replacing FRUs . . . . . . 69
30
30 Locations. . . . . . . . . . . . . . . . .
31 Locating connectors, controls, and indicators
on the front of your computer . . . . . . .
Locating connectors on the rear of your
computer . . . . . . . . . . . . . . .
33
Locating components . . . . . . . . . .
34
Locating parts on the system board . . . .
Opening the computer cover . . . . . . . . .
37
Removing and reinstalling the front bezel . . . .
37 Installing or replacing a memory module . . . .
38 Installing or replacing the PCI card . . . . . . .
38
Replacing the hard disk drive . . . . . . . . .
Replacing the optical drive . . . . . . . . . .
38
Replacing the battery . . . . . . . . . . . .
Replacing the heat sink . . . . . . . . . . .
38
Replacing the microprocessor
39
Replacing the system board . . . . . . . . .
40
Replacing the system fan assembly . . . . . .
Replacing the internal speaker . . . . . . . .
Replacing the front audio and USB assembly
Replacing the ac power adapter . . . . . . . .
41
Replacing the ac power adapter bracket . . . .
41
Completing the parts replacement . . . . . . .
41
42
Chapter 9. FRU lists . . . . . . . . . . 99
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