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Replacing the rear fan assembly

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10. Reinstall the front bezel. See "Removing and reinstalling the front bezel" on page 73. 11. To complete the replacement, go to "Completing the parts replacement" on page 98. Replacing the rear fan assembly Attention: Do not open your computer or attempt any repair before reading and understanding the "Important safety information" in the ThinkCentre Safety and Warranty Guide that came with your computer. To obtain a copy of the ThinkCentre Safety and Warranty Guide, go to: http://www.lenovo.com/support This section provides instructions on how to replace the rear fan assembly. To replace the rear fan assembly, do the following: 1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect all power cords from electrical outlets and disconnect all cables that are connected to the computer. 2. Remove the computer cover. See "Removing the computer cover" on page 72. 3. Locate the rear fan assembly. See "Locating components" on page 69. 4. Disconnect the rear fan assembly cable from the system fan connector on the system board. See "Locating parts on the system board" on page 70. 5. The rear fan assembly is attached to the chassis by four rubber mounts. Carefully remove the four rubber mounts from the rear of the chassis by breaking them or cutting them with scissors. Note: The new rear fan assembly will have four new rubber mounts attached. Figure 30. Removing the rear fan assembly 6. Remove the rear fan assembly out of the chassis. 7. Install the new rear fan assembly by aligning the rubber mounts of the rear fan assembly with the holes on the chassis and push the rubber mounts through the holes. 94 ThinkCentre Hardware Maintenance Manual

Section	Page
Chapter 1. About this manual	9
Important safety information	9
Important information about replacing RoHS compliant FRUs	9
Chapter 2. Safety information	11
General safety	11
Electrical safety	11
Voltage-selection switch	13
Safety inspection guide	13
Handling electrostatic discharge-sensitive devices	14
Grounding requirements	14
Safety notices (multi-lingual translations)	14
Chapter 3. General information	37
Lenovo ThinkVantage Tools	37
Lenovo Welcome	37
Lenovo Solution Center	37
SimpleTap	37
Information resources	37
Specifications	37
Specifications: 4165, 7179, 7182, 7490, 7493, 7511, and 7521	38
Specifications: 7181, 7189, 7239, 7492, 7507, 7513, and 7529	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	70
Undetermined problems	72
Chapter 8. Installing or replacing hardware: 4165, 7179, 7182, 7490, 7493, 7511, and 7521	75
Locations	75
Locating connectors, controls, and indicators on the front of your computer	75
Locating connectors and parts on the rear of your computer	76
Locating components	77
Locating parts on the system board	78
Locating internal drives	79
Handling static-sensitive devices	80
Installing or replacing hardware	80
Installing external options	80
Removing the computer cover	80
Removing and reinstalling the front bezel	81
Installing or replacing a PCI card	83
Installing or replacing a memory module	86
Replacing the battery	88
Replacing the power supply assembly	89
Replacing the heat sink and fan assembly	92
Replacing the microprocessor	94
Replacing the optical drive	95
Replacing the hard disk drive	97
Replacing the card reader	100
Replacing the front audio and USB assembly	101
Replacing the rear fan assembly	102
Replacing the system board	103
Completing the parts replacement	106
Chapter 9. Installing or replacing hardware: 7181, 7189, 7239, 7492, 7507, 7513, and 7529	109
Locations	109
Locating connectors, controls, and indicators on the front of your computer	109
Locating connectors and parts on the rear of your computer	110
Locating components	111
Locating parts on the system board	112
Locating internal drives	113
Handling static-sensitive devices	114
Installing or replacing hardware	114
Installing external options	114
Removing the computer cover	115
Removing and reinstalling the front bezel	116
Accessing the system board components and drives	117
Installing or replacing a PCI card	118
Installing or replacing a memory module	121
Replacing the battery	123
Replacing the heat sink and fan assembly	124
Replacing the microprocessor	127
Replacing the power supply assembly	129
Replacing the optical drive	133
Replacing the hard disk drive	136
Replacing the card reader	139
Replacing the front fan assembly	140
Replacing the system board	142
Completing the parts replacement	146
Chapter 10. FRU lists	149
Overall: MT 7181, 7189, 7492, 7507, 7513, 7529, and 7239	149
Mechanical FRUs	156
Keyboard and Mouse	159
Adapters and miscellaneous FRUs	188
Power Cords	190
Recovery discs	196
Windows 7 Starter Recovery CD	196
Windows 7 Home Basic 32 Recovery CD	198
Windows 7 Home Premium 32 Recovery CD	199
Windows 7 Home Premium 64 Recovery CD	200
Windows 7 Professional 32 Recovery CD	201
Windows 7 Professional 64 Recovery CD	202
Windows 7 Ultimate 32 Recovery CD	205
Windows 7 Ultimate 64 Recovery CD	205
Windows XP Professional 32 Recovery CD	206
Windows Vista Business 32 Recovery CD	207
Overall: MT 4165, 7179, 7182, 7490, 7493, 7511, and 7521	208
Mechanical FRUs	215
Keyboard and Mouse	218
Adapters and miscellaneous FRUs	247
Power Cords	249
Recovery discs	255
Windows 7 Starter Recovery CD	255
Windows 7 Home Basic 32 Recovery CD	257
Windows 7 Home Premium 32 Recovery CD	258
Windows 7 Home Premium 64 Recovery CD	259
Windows 7 Professional 32 Recovery CD	260
Windows 7 Professional 64 Recovery CD	261
Windows Vista Business 32 Recovery CD	264
Windows XP Professional 32 Recovery CD	264
Windows 7 Ultimate 32 Recovery CD	266
Windows 7 Ultimate 64 Recovery CD	267
Chapter 11. Additional service information	269
Security features	269
Hardware-controlled passwords	269
Operating system password	269
Vital Product Data	269
BIOS levels	269
Updating (flashing) the BIOS from a disc	269
Updating (flashing) the BIOS from your operating system	270
Recovering from a POST and BIOS update failure	270
Power management	271
Advanced Configuration and Power Interface (ACPI) BIOS	271
Automatic Power-On features	271
Chapter 12. Getting information, help, and service	273
Information resources	273
Lenovo ThinkVantage Tools	273
Lenovo Welcome	273
Access Help	273
Safety and warranty	273
Lenovo Web site (http://www.lenovo.com)	274
Help and service	274
Using the documentation and diagnostic programs	274
Calling for service	274
Using other services	275
Purchasing additional services	275
Appendix A. Notices	277
Television output notice	278
European conformance CE mark	278
Trademarks	278

Match case Limit results 1 per page

10. Reinstall the front bezel. See “Removing and reinstalling the front bezel” on page 73.

11. To complete the replacement, go to “Completing the parts replacement” on page 98.

Replacing the rear fan assembly

Attention:

Do not open your computer or attempt any repair before reading and understanding the “Important safety information”

in the

ThinkCentre Safety and Warranty Guide

that came with your computer. To obtain a copy of the

ThinkCentre

Safety and Warranty Guide

, go to:

http://www.lenovo.com/support

This section provides instructions on how to replace the rear fan assembly.

To replace the rear fan assembly, do the following:

1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect

all power cords from electrical outlets and disconnect all cables that are connected to the computer.

2. Remove the computer cover. See “Removing the computer cover” on page 72.

3. Locate the rear fan assembly. See “Locating components” on page 69.

4. Disconnect the rear fan assembly cable from the system fan connector on the system board. See

“Locating parts on the system board” on page 70.

5. The rear fan assembly is attached to the chassis by four rubber mounts. Carefully remove the four

rubber mounts from the rear of the chassis by breaking them or cutting them with scissors.

Note:

The new rear fan assembly will have four new rubber mounts attached.

Figure 30. Removing the rear fan assembly

6. Remove the rear fan assembly out of the chassis.

7. Install the new rear fan assembly by aligning the rubber mounts of the rear fan assembly with the holes

on the chassis and push the rubber mounts through the holes.

ThinkCentre Hardware Maintenance Manual