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Lenovo ThinkCentre M76 Hardware Maintenance Manual for ThinkCentre M76 - Page 110

chassis and push the rubber mounts through the holes.

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5. The rear fan assembly is attached to the chassis by four rubber mounts. Remove the rear fan assembly by breaking or cutting the rubber mounts and gently pulling the rear fan assembly out of the chassis. Note: The new rear fan assembly will have four new rubber mounts attached. Figure 41. Removing the rear fan assembly 6. Install the new rear fan assembly by aligning the new rubber mounts with the corresponding holes in the chassis and push the rubber mounts through the holes. 106 ThinkCentre Hardware Maintenance Manual

Section	Page
Chapter 1. About this manual	5
Important safety information	5
Chapter 2. Safety information	7
General safety	7
Electrical safety	7
Voltage-selection switch	9
Safety inspection guide	9
Handling electrostatic discharge-sensitive devices	10
Grounding requirements	10
Safety notices (multi-lingual translations)	10
Chapter 3. General information	37
Lenovo Welcome	37
Lenovo ThinkVantage Tools	37
Lenovo Solution Center	37
SimpleTap	37
Additional information resources	38
Specifications	38
For machine types: 3114, 3121, 3123, and 3127.	38
For machine types: 3120, 3122, 3126, and 3128.	39
Chapter 4. General checkout	41
Problem determination tips	41
Chapter 5. Diagnostic programs	43
Lenovo ThinkVantage Toolbox	43
Lenovo Solution Center	43
PC-Doctor for DOS	44
Creating a diagnostic disc	44
Running the diagnostic program from the diagnostic disc	44
Navigating through the diagnostic programs	44
Running tests	44
Viewing the test log	46
Chapter 6. Using the Setup Utility program	47
Starting the Setup Utility program	47
Viewing or changing settings	47
Using passwords	47
Password considerations	48
Power-on password	48
Administrator password	48
Setting, changing, or deleting a password	48
Enabling or disabling a device	48
Selecting a startup device	49
Selecting a temporary startup device	49
Viewing or changing the startup device sequence	49
Exiting the Setup Utility program	50
Chapter 7. Symptom-to-FRU index	51
Hard disk drive boot error	51
Power supply problems	51
Diagnostic error codes	51
Beep symptoms	69
POST error codes	69
Miscellaneous error messages	71
Undetermined problems	73
Chapter 8. Replacing FRUs (Machine Types: 3114, 3121, 3123, and 3127.)	75
Locations	75
Locating connectors, controls, and indicators on the front of your computer	76
Locating connectors and parts on the rear of your computer	77
Locating components	79
Locating parts on the system board	80
Locating internal drives	80
Handling static-sensitive devices	81
Installing or replacing hardware	82
Removing the computer cover	82
Removing and reinstalling the front bezel	83
Installing or replacing a PCI card	84
Installing or replacing a memory module	87
Installing or replacing the optical drive	89
Installing or replacing the card reader	91
Replacing the battery	95
Replacing the power supply assembly	96
Replacing the heat sink and fan assembly	98
Replacing the microprocessor	100
Replacing the system board	102
Replacing the primary hard disk drive	104
Replacing the secondary hard disk drive	106
Replacing the Front fan assembly	108
Replacing the rear fan assembly	109
Replacing the front audio and USB assembly	111
Replacing the internal speaker	112
Completing the parts replacement	114
Chapter 9. Replacing FRUs (Machine Types: 3120, 3122, 3126, and 3128.)	117
Locations	117
Locating connectors, controls, and indicators on the front of your computer	118
Locating connectors on the rear of your computer	119
Locating components	120
Locating parts on the system board	121
Locating internal drives	121
Handling static-sensitive devices	122
Installing or replacing hardware	123
Opening the computer cover	123
Removing and reinstalling the front bezel	124
Accessing the system board components and drives	126
Installing or replacing a memory module	127
Installing or replacing a PCI card	128
Installing or replacing the card reader	130
Replacing the battery	135
Replacing the hard disk drive	136
Replacing the optical drive	139
Replacing the heat sink and fan assembly	141
Replacing the power supply assembly	144
Replacing the microprocessor	149
Replacing the system board	152
Replacing the system fan assembly	154
Replacing the internal speaker	155
Replacing the front audio and USB assembly	160
Completing the parts replacement	161
Chapter 10. FRU lists	163
Overall: MT 3120, 3122, 3126, and 3128	163
Mechanical FRUs	166
Keyboard and Mouse	168
Adapters and miscellaneous FRUs	178
Power Cords	178
Recovery discs	181
Windows 7 Home Basic 32 SP1 Recovery CD	181
Windows 7 Home Premium 32 SP1 Recovery CD	181
Windows 7 Home Premium 64 SP1 Recovery CD	181
Windows 7 Professional 32 SP1 Recovery CD	181
Windows 7 Professional 64 SP1 Recovery CD	181
Windows 7 Ultimate 32 SP1 Recovery CD	182
Windows 7 Ultimate 64 SP1 Recovery CD	182
Windows XP Professional 32 Recovery CD	182
Windows XP Professional Generic Recovery CD	182
Windows Vista Business 32 Recovery CD	183
Overall: 3114, 3121, 3123, and 3127	184
Mechanical FRUs	187
Keyboard and Mouse	189
Adapters and miscellaneous FRUs	198
Power Cords	199
Recovery discs	201
Windows 7 Home Basic 32 SP1 Recovery CD	201
Windows 7 Home Premium 32 SP1 Recovery CD	201
Windows 7 Home Premium 64 SP1 Recovery CD	202
Windows 7 Professional 32 SP1 Recovery CD	202
Windows 7 Professional 64 SP1 Recovery CD	202
Windows 7 Ultimate 32 SP1 Recovery CD	202
Windows 7 Ultimate 64 SP1 Recovery CD	202
Windows XP Professional 32 Recovery CD	202
Windows XP Professional Generic Recovery CD	203
Windows Vista Business 32 Recovery CD	204
Chapter 11. Additional service information	205
Security features	205
Hardware-controlled passwords	205
Operating system password	205
Vital Product Data	205
BIOS levels	205
Updating (flashing) the BIOS from a disc	205
Updating (flashing) the BIOS from your operating system	206
Recovering from a POST and BIOS update failure	206
Power management	207
Advanced Configuration and Power Interface (ACPI) BIOS	207
Automatic Power-On features	207
Appendix A. Notices	209
Television output notice	210
Europeanpean conformance CE mark	210
Trademarks	210