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Replacing the rear fan assembly

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6. Pull on the tips of the rubber mounts until the front fan assembly is in place. Figure 32. Installing the front fan assembly 7. Connect the front fan assembly cable to the power fan connector on the system board. What to do next: v To work with another piece of hardware, go to the appropriate section. v To complete the replacement, go to "Completing the FRU replacement" on page 120. 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. Chapter 8. Replacing FRUs - Tamdhu 115

Section	Page
Contents	5
Chapter 1. About this manual	7
Important safety information	7
Important information about replacing the RoHS compliant FRUs	8
Chapter 2. Safety information	9
General safety	9
Electrical safety	9
Voltage-selection switch	11
Safety inspection guide	11
Handling electrostatic discharge-sensitive devices	12
Grounding requirements	13
Safety notices (multi-lingual translations)	13
Chapter 3. General information	45
Lenovo ThinkVantage Tools	45
Lenovo Care	45
Access Help	45
Additional information resources	46
Specifications	47
For machine types: 7515, 7523, 7569, and 7611.	47
For machine types: 7522, 7560, 7610, and 7705.	47
For all machine types	47
Chapter 4. General checkout	49
Problem determination tips	49
Chapter 5. Diagnostics	51
Lenovo ThinkVantage Toolbox	51
Lenovo System Toolbox	51
PC-Doctor for Rescue and Recovery	52
PC-Doctor for DOS	52
Creating a diagnostic disc	52
Running the diagnostic program from the diagnostic disc	53
Navigating through the diagnostics programs	53
Running tests	53
Test results	54
Quick and Full erase - hard drive	54
Viewing the test log	55
Chapter 6. Using the Setup Utility program	57
Starting the Setup Utility program	57
Viewing and changing settings	57
Using passwords	57
Password considerations	58
Set Power-On Password	58
Set Administrator Password	58
Setting, changing, or deleting a password	58
Enabling or disabling a device	59
Selecting a startup device	59
Selecting a temporary startup device	59
Viewing or changing the startup device sequence	60
Exiting the Setup Utility program	60
Chapter 7. Symptom-to-FRU index	61
Hard disk drive boot error	61
Power supply problems	61
Diagnostic error codes	62
Beep symptoms	83
POST error codes	84
Miscellaneous error messages	86
Undetermined problems	87
Chapter 8. Replacing FRUs (Machine types: 7515, 7523, 7569, and 7611.)	89
Locating connectors on the front of your computer	90
Locating connectors on the rear of your computer	91
Removing the computer cover	92
Locating components	94
Locating parts on the system board	95
Removing and reinstalling the front bezel	95
Installing or replacing a memory module	96
Installing or replacing a PCI card	98
Replacing the battery	101
Replacing the power supply assembly	102
Replacing the heat sink and fan assembly	104
Replacing the microprocessor	106
Replacing the system board	109
Replacing the primary hard disk drive	111
Replacing the secondary hard disk drive	113
Replacing the optical drive	116
Replacing the diskette drive or card reader	118
Replacing the front fan assembly	119
Replacing the rear fan assembly	121
Replacing the internal speaker	123
Replacing the front audio and USB assembly	125
Completing the FRU replacement	126
Chapter 9. Replacing FRUs (Machine types: 7522, 7560, 7610, and 7705.)	129
Locating connectors on the front of your computer	130
Locating connectors on the rear of your computer	131
Opening the computer cover	132
Accessing the system board components and drives	133
Locating components	134
Locating parts on the system board	135
Installing or replacing a memory module	136
Installing or replacing an adapter card	138
Replacing the battery	140
Replacing the hard disk drive	142
Replacing the optical drive	143
Replacing the power supply assembly	146
Replacing the heat sink and fan assembly	148
Replacing the microprocessor	150
Replacing the system board	153
Replacing the card reader	155
Replacing the front audio and USB assembly	156
Replacing the internal speaker	157
Completing the FRU replacement	161
Chapter 10. FRU lists	163
Machine type 7515	163
Machine type 7522	181
Machine type 7523	199
Machine type 7560	212
Machine type 7569	226
Machine type 7610	239
Machine type 7611	253
Machine type 7705	268
Chapter 11. Additional service information	283
Security features	283
Hardware controlled Passwords	283
Operating system password	283
Vital product data	283
BIOS levels	283
Updating (flashing) BIOS from a disc	284
Updating (flashing) BIOS from your operating system	284
Recovering from a POST/BIOS update failure	284
Power management	285
Automatic configuration and power interface (ACPI) BIOS	285
Automatic Power-On features	285
Appendix. Notices	287
Television output notice	288
Trademarks	288
Index	289
A	289
B	289
C	289
D	289
E	289
F	289
G	289
H	289
I	289
L	289
M	289
O	289
P	289
R	290
S	290
T	290
U	290