Lenovo ThinkCentre M76, Hardware Maintenance Manual, Page: 3 / 214

Contents
Chapter 1. About this manual . . . . . . 1
Important safety information . . . . . . . . . . 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 . . . . 33
Lenovo Welcome. . . . . . . . . . . . . . 33
Lenovo ThinkVantage Tools . . . . . . . . . 33
Lenovo Solution Center . . . . . . . . . . . 33
SimpleTap . . . . . . . . . . . . . . . . 33
Additional information resources . . . . . . . 34
Specifications . . . . . . . . . . . . . . . 34
For machine types: 3114, 3121, 3123, and
3127.
. . . . . . . . . . . . . . . . 34
For machine types: 3120, 3122, 3126, and
3128.
. . . . . . . . . . . . . . . . 35
Chapter 4. General checkout . . . . . 37
Problem determination tips . . . . . . . . . . 37
Chapter 5. Diagnostic programs . . . 39
Lenovo ThinkVantage Toolbox . . . . . . . . 39
Lenovo Solution Center . . . . . . . . . . . 39
PC-Doctor for DOS . . . . . . . . . . . . . 40
Creating a diagnostic disc . . . . . . . . 40
Running the diagnostic program from the
diagnostic disc . . . . . . . . . . . . .
40
Navigating through the diagnostic programs . 40
Running tests . . . . . . . . . . . . . 40
Viewing the test log . . . . . . . . . . . 42
Chapter 6. Using the Setup Utility
program . . . . . . . . . . . . . . . .
43
Starting the Setup Utility program . . . . . . . 43
Viewing or changing settings . . . . . . . . . 43
Using passwords. . . . . . . . . . . . . . 43
Password considerations . . . . . . . . . 44
Power-on password . . . . . . . . . . . 44
Administrator password . . . . . . . . . 44
Setting, changing, or deleting a password . . 44
Enabling or disabling a device . . . . . . . . 44
Selecting a startup device . . . . . . . . . . 45
Selecting a temporary startup device . . . . 45
Viewing or changing the startup device
sequence . . . . . . . . . . . . . . .
45
Exiting the Setup Utility program . . . . . . . 46
Chapter 7. Symptom-to-FRU index . . 47
Hard disk drive boot error . . . . . . . . . . 47
Power supply problems . . . . . . . . . . . 47
Diagnostic error codes . . . . . . . . . . . 47
Beep symptoms . . . . . . . . . . . . . . 65
POST error codes . . . . . . . . . . . . . 65
Miscellaneous error messages . . . . . . . . 67
Undetermined problems . . . . . . . . . . . 69
Chapter 8. Replacing FRUs (Machine
Types: 3114, 3121, 3123, and 3127.) .
71
Locations. . . . . . . . . . . . . . . . . 71
Locating connectors, controls, and indicators
on the front of your computer . . . . . . .
72
Locating connectors and parts on the rear of
your computer . . . . . . . . . . . . .
73
Locating components . . . . . . . . . . 75
Locating parts on the system board . . . . 76
Locating internal drives . . . . . . . . . 76
Handling static-sensitive devices . . . . . . . 77
Installing or replacing hardware . . . . . . . . 78
Removing the computer cover. . . . . . . 78
Removing and reinstalling the front bezel . . 79
Installing or replacing a PCI card . . . . . . 80
Installing or replacing a memory module . . . 83
Installing or replacing the optical drive . . . 85
Installing or replacing the card reader . . . . 87
Replacing the battery . . . . . . . . . . 91
Replacing the power supply assembly . . . 92
Replacing the heat sink and fan assembly . . 94
Replacing the microprocessor . . . . . . . 96
Replacing the system board . . . . . . . 98
Replacing the primary hard disk drive . . . . 100
Replacing the secondary hard disk drive. . . 102
Replacing the Front fan assembly . . . . . 104
Replacing the rear fan assembly . . . . . . 105
Replacing the front audio and USB
assembly . . . . . . . . . . . . . . .
107
Replacing the internal speaker. . . . . . . 108
Completing the parts replacement . . . . . 110
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