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Lenovo ThinkCentre Edge 91 Hardware Maintenance Manual (HMM) (April 2012) - Th - Page 108

Completing the parts replacement

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6. Remove the screw that secures the front audio and USB assembly bracket to the chassis to remove the bracket from the chassis. Figure 33. Removing the front audio and USB assembly 7. Install the new front audio and USB assembly into the chassis and align the screw hole in the bracket with the corresponding hole in the chassis. 8. Install the screw to secure the new front audio and USB assembly to the chassis. 9. Reconnect the front audio and USB assembly cables to the front audio connector and the front USB connector on the system board. See "Locating parts on the system board" on page 77. 10. To complete the installation or replacement, go to "Completing the parts replacement" on page 104. Completing the parts replacement After completing the installation or replacement for all parts, you need to reinstall the computer cover and reconnect cables. Depending on the parts you installed or replaced, you might need to confirm the updated information in the Setup Utility program. Refer to Chapter 6 "Using the Setup Utility program" on page 43. To reinstall the computer cover and reconnect cables to your computer, do the following: 1. Make sure that all components have been reassembled correctly and that no tools or loose screws are left inside your computer. See "Locating components" on page 76 for the locations of various components in your computer. 2. Make sure that the cables are routed correctly. Keep cables clear of the hinges and sides of the computer chassis to avoid interference with closing the computer cover. 3. If you have removed the front bezel, reinstall it. See "Removing and reinstalling the front bezel" on page 80. 104 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: 1852, 1853, 1855, 3247, and 3248	38
For machine types: 1857, 1893, 1895, 3250, and 3253	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 and changing settings	47
Using passwords	47
Password considerations	48
Power-On Password	48
Administrator Password	48
Hard Disk Password	48
Setting, changing, and deleting a password	48
Erasing lost or forgotten passwords (clearing CMOS)	49
Enabling or disabling a device	49
Selecting a startup device	50
Selecting a temporary startup device	50
Selecting or changing the startup device sequence	50
Enabling ErP compliance mode	50
Exiting the Setup Utility program	51
Chapter 7. Symptom-to-FRU index	53
Hard disk drive boot error	53
Power supply problems	53
Diagnostic error codes	53
Beep symptoms	71
POST error codes	71
Miscellaneous error messages	73
Undetermined problems	75
Chapter 8. Replacing FRUs (Machine Types: 1852, 1853, and 1855)	77
Locations	77
Locating connectors, controls, and indicators on the front of your computer	78
Locating connectors on the rear of your computer	79
Locating components	80
Locating parts on the system board	81
Locating internal drives	82
Handling static-sensitive devices	82
Installing or replacing hardware	83
Removing the computer cover	83
Removing and reinstalling the front bezel	84
Installing or replacing a PCI card	86
Installing or replacing a memory module	89
Replacing the battery	91
Replacing the primary hard disk drive	92
Replacing the optical drive	94
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 rear fan assembly	105
Replacing the front audio and USB assembly	107
Completing the parts replacement	108
Chapter 9. Replacing FRUs (Machine Types: 1857, 1893, and 1895)	111
Locations	111
Locating connectors, controls, and indicators on the front of your computer	111
Locating connectors on the rear of your computer	112
Locating components	112
Locating parts on the system board	113
Locating internal drives	115
Handling static-sensitive devices	115
Installing or replacing hardware	116
Removing the computer cover	116
Removing and reinstalling the front bezel	117
Accessing the system board components and drives	118
Installing or replacing a PCI card	120
Installing or replacing a memory module	122
Replacing the battery	123
Replacing the hard disk drive	124
Replacing the optical drive	127
Replacing the power supply assembly	130
Replacing the heat sink and fan assembly	134
Replacing the microprocessor	137
Replacing the system board	140
Replacing the system fan assembly	143
Replacing the front audio and USB assembly	144
Completing the parts replacement	145
Chapter 10. FRU lists	147
Overall: 1852, 1853, 1855, 3247, and 3248	147
Mechanical FRUs	153
Keyboard and Mouse	156
Adapters and miscellaneous FRUs	181
Power Cords	182
Recovery discs	187
Windows 7 Starter Recovery CD	187
Windows 7 Home Basic 32 Recovery CD	188
Windows 7 Home Premium 32 Recovery CD	189
Windows 7 Home Premium 64 Recovery CD	190
Windows 7 Professional 32 Recovery CD	193
Windows 7 Professional 64 Recovery CD	194
Windows XP Professional 32 Recovery CD	196
Windows XP Professional Generic 32 Recovery CD	196
Overall: MT 1857, 1893, 1895, 3250, and 3253	199
Mechanical FRUs	206
Keyboard and Mouse	209
Adapters and miscellaneous FRUs	234
Power Cords	234
Recovery discs	239
Windows 7 Starter Recovery CD	239
Windows 7 Home Basic 32 Recovery CD	240
Windows 7 Home Premium 32 Recovery CD	241
Windows 7 Home Premium 64 Recovery CD	242
Windows 7 Professional 32 SP 1 Recovery CD	245
Windows 7 Professional 64 SP 1 Recovery CD	246
Windows XP Professional 32 Recovery CD	248
Windows XP Professional Generic Recovery CD	248
Chapter 11. Additional service information	253
Security features	253
Hardware-controlled passwords	253
Operating system password	253
Vital Product Data	253
BIOS levels	253
Updating (flashing) the BIOS from a disc	253
Updating (flashing) the BIOS from your operating system	254
Recovering from a POST/BIOS update failure	254
Power management	255
Advanced Configuration and Power Interface (ACPI) BIOS	255
Automatic Power-On features	255
Appendix A. Notices	257
Television output notice	258
European conformance CE mark	258
Trademarks	258

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6. Remove the screw that secures the front audio and USB assembly bracket to the chassis to remove

the bracket from the chassis.

Figure 33. Removing the front audio and USB assembly

7. Install the new front audio and USB assembly into the chassis and align the screw hole in the bracket

with the corresponding hole in the chassis.

8. Install the screw to secure the new front audio and USB assembly to the chassis.

9. Reconnect the front audio and USB assembly cables to the front audio connector and the front USB

connector on the system board. See “Locating parts on the system board” on page 77.

10. To complete the installation or replacement, go to “Completing the parts replacement” on page 104.

Completing the parts replacement

After completing the installation or replacement for all parts, you need to reinstall the computer cover and

reconnect cables. Depending on the parts you installed or replaced, you might need to conﬁrm the updated

information in the Setup Utility program. Refer to Chapter 6 “Using the Setup Utility program” on page 43.

To reinstall the computer cover and reconnect cables to your computer, do the following:

1. Make sure that all components have been reassembled correctly and that no tools or loose screws

are left inside your computer. See “Locating components” on page 76 for the locations of various

components in your computer.

2. Make sure that the cables are routed correctly. Keep cables clear of the hinges and sides of the

computer chassis to avoid interference with closing the computer cover.

3. If you have removed the front bezel, reinstall it. See “Removing and reinstalling the front bezel” on

page 80.

104

ThinkCentre Hardware Maintenance Manual