Contents
Chapter 1. About this manual . . . . . . 1
Important safety information . . . . . . . . . .
1
Important information about replacing RoHS
compliant FRUs . . . . . . . . . . . . . . .
1
Chapter 2. Safety information . . . . . . 3
General safety . . . . . . . . . . . . . . . .
3
Electrical safety . . . . . . . . . . . . . . .
3
Voltage-selection switch . . . . . . . . . . . .
5
Safety inspection guide . . . . . . . . . . . .
5
Handling electrostatic discharge-sensitive
devices
. . . . . . . . . . . . . . . . . .
6
Grounding requirements . . . . . . . . . . . .
6
Safety notices (multi-lingual translations) . . . . .
6
Chapter 3. General information . . . .
29
Lenovo Welcome. . . . . . . . . . . . . .
29
Lenovo ThinkVantage Tools
. . . . . . . . .
29
Lenovo ThinkVantage Toolbox
. . . . . . . .
29
SimpleTap . . . . . . . . . . . . . . . .
29
Lenovo Solution Center . . . . . . . . . . .
30
ThinkVantage Productivity Center . . . . . . .
30
Additional information resources
. . . . . . .
30
Specifications . . . . . . . . . . . . . . .
31
Chapter 4. General checkout . . . . .
33
Checking for power problems. . . . . . . . .
33
Problem determination tips . . . . . . . . . .
34
Chapter 5. Diagnostics . . . . . . . .
37
Lenovo ThinkVantage Toolbox
. . . . . . . .
37
Lenovo Solution Center . . . . . . . . . . .
37
PC-Doctor for DOS . . . . . . . . . . . . .
38
Creating a diagnostic disc . . . . . . . .
38
Running the diagnostic program from a
diagnostic disc . . . . . . . . . . . . .
38
Navigating through the diagnostics
programs . . . . . . . . . . . . . . .
38
Running tests . . . . . . . . . . . . .
39
Viewing the test log . . . . . . . . . . .
40
Chapter 6. Using the Setup Utility
program . . . . . . . . . . . . . . . .
41
Starting the Setup Utility program . . . . . . .
41
Viewing and changing settings . . . . . . . .
41
Using passwords. . . . . . . . . . . . . .
41
Password considerations . . . . . . . . .
42
Power-On Password
. . . . . . . . . .
42
Administrator Password . . . . . . . . .
42
Hard Disk Password. . . . . . . . . . .
42
Setting, changing, and deleting a password .
42
Erasing lost or forgotten passwords (clearing
CMOS) . . . . . . . . . . . . . . . .
43
Enabling or disabling a device
. . . . . . . .
43
Selecting a startup device . . . . . . . . . .
44
Selecting a temporary startup device . . . .
44
Selecting or changing the startup device
sequence . . . . . . . . . . . . . . .
44
Smart performance choices . . . . . . . . .
44
Exiting from the Setup Utility program . . . . .
45
Chapter 7. Symptom-to-FRU index . .
47
Hard disk drive boot error . . . . . . . . . .
47
Diagnostic error codes . . . . . . . . . . .
47
Beep symptoms . . . . . . . . . . . . . .
63
POST error codes . . . . . . . . . . . . .
63
Miscellaneous error messages . . . . . . . .
65
Undetermined problems . . . . . . . . . . .
66
Chapter 8. Replacing FRUs . . . . . .
69
Locations. . . . . . . . . . . . . . . . .
69
Locating connectors, controls, and indicators
on the front of your computer . . . . . . .
69
Locating connectors on the rear of your
computer . . . . . . . . . . . . . . .
70
Locating components . . . . . . . . . .
71
Locating parts on the system board
. . . .
71
Opening the computer cover . . . . . . . . .
72
Removing and reinstalling the front bezel . . . .
73
Installing or replacing a memory module
. . . .
74
Installing or replacing the PCI card . . . . . . .
75
Replacing the hard disk drive . . . . . . . . .
77
Replacing the optical drive . . . . . . . . . .
78
Replacing the battery . . . . . . . . . . . .
80
Replacing the heat sink . . . . . . . . . . .
81
Replacing the microprocessor
. . . . . . . .
83
Replacing the system board . . . . . . . . .
86
Replacing the system fan assembly . . . . . .
88
Replacing the internal speaker . . . . . . . .
91
Replacing the front audio and USB assembly
. .
92
Replacing the ac power adapter . . . . . . . .
94
Replacing the ac power adapter bracket . . . .
95
Completing the parts replacement . . . . . . .
98
Chapter 9. FRU lists . . . . . . . . . .
99
© Copyright Lenovo 2011, 2012
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Содержание ThinkCentre M91
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