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Lenovo ThinkCentre A62 Hardware Maintenance Manual - Page 105

User Guide, This provides information on how to remove and replace the power supply.

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2. Locate the battery. See "Locating parts on the system board" on page 95. 3. Remove the old battery. 4. Install the new battery. 5. Replace the computer cover, and connect the cables Note: When the computer is turned on for the first time after battery replacement, an error message might be displayed. This is normal after replacing the battery. 6. Turn on the computer and all attached devices. 7. Use the Setup Utility program to set the date and time and any passwords. See "Using the Setup Utility" in the User Guide Replacing the power supply Attention Never remove the cover on a power supply or any part that has the following label attached. Hazardous voltage, current, and energy levels are present inside any component that has this label attached. There are no serviceable parts inside these components. 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 information on how to remove and replace the power supply. To remove or replace the power supply: 1. Remove the cover. See "Removing the cover" on page 94. 2. Remove the drive bay assembly. See "Accessing system board components and drives" on page 96. 3. Disconnect all power supply cables from the system board. See "Locating parts on the system board" on page 95. Chapter 9 Replacing FRUs (Types 7057, 7062, 7092, 9342, 9344, 9354, 9426, 9486, 9624, 9707, 9787, 9804, 9945) 99

Section	Page
Chapter 1. About this manual	7
Important Safety Information	7
Important information about replacing RoHS compliant FRUs	7
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	12
Safety notices (multi-lingual translations)	12
Chapter 3. General information	35
The ThinkVantage Productivity Center program	35
Additional information resources	35
Specifications	35
For machine types: 7057, 7062, 7092, 9342, 9344, 9354, 9426, 948	35
For machine types: 7061, 7090, 9353, 9421, 9485, 9623, 9625, 970	35
Chapter 4. General Checkout	37
Problem determination tips	37
Chapter 5. Diagnostics	39
Lenovo System Toolbox	39
PC-Doctor for Windows PE	39
Running diagnostics from the Rescue and Recovery workspace	39
PC-Doctor for DOS	40
Creating a diagnostic CD image	40
Creating diagnostic diskettes	40
Running diagnostics from the CD or diskettes	40
Navigating through the diagnostics programs	41
Running tests	41
Viewing the test log	42
Chapter 6. Using the Setup Utility	45
Starting the Setup Utility program	45
Viewing and changing settings	45
Using passwords	45
Password considerations	45
User Password	46
Administrator Password	46
Setting, changing, and deleting a password	46
Enabling or disabling a device	46
Selecting a startup device	47
Selecting a temporary startup device	47
Selecting or changing the startup device sequence	47
Exiting from the Setup Utility program	47
Chapter 7. Symptom-to-FRU Index	49
Hard disk drive boot error	49
Power Supply Problems	49
Diagnostic error codes	50
Beep symptoms	67
POST error codes	68
Miscellaneous error messages	69
Undetermined problems	71
Chapter 8. Replacing FRUs (Types 7061, 7090, 9353, 9421, 9485, 9	73
Locating controls and connectors on the front of your computer	73
Rear connectors	73
Removing the cover	74
Locations	75
Locating parts on the system board	77
Removing and replacing the front bezel	77
Replacing the power supply	78
Replacing the system board	79
Replacing the microprocessor	83
Replacing a memory module	85
Replacing a PCI adapter card	86
Replacing the hard disk drive	88
Replacing an optical drive	90
Replacing the diskette drive	91
Replacing the rear fan assembly	92
Replacing the front fan assembly	93
Replacing the front audio/USB assembly	95
Replacing the power switch/LED assembly	95
Replacing the CMOS battery	96
Completing the FRU replacement	97
Chapter 9. Replacing FRUs (Types 7057, 7062, 7092, 9342, 9344, 9	99
Rear connectors	99
Removing the cover	100
Locations	100
Locating parts on the system board	101
Accessing system board components and drives	102
Replacing a memory module	103
Replacing the CMOS battery	104
Replacing the power supply	105
Replacing the system board	106
Replacing the microprocessor	110
Replacing the hard disk drive	112
Replacing an optical drive	114
Replacing the diskette drive	115
Replacing the power switch/LED assembly	115
Replacing the front panel card	116
Replacing the system fan assembly	117
Replacing a PCI adapter card	118
Completing the FRU replacement	119
Chapter 10. FRU lists	121
Machine Type 3656	121
Machine Type 3658	134
Machine Type 7057	147
Machine Type 7061	161
Machine Type 7062	174
Machine Type 7090	188
Machine Type 7092	201
Machine Type 9342	214
Machine Type 9344	227
Machine Type 9353	240
Machine Type 9354	253
Machine Type 9421	266
Machine Type 9426	279
Machine Type 9485	292
Machine Type 9486	308
Machine Type 9623	324
Machine Type 9624	337
Machine Type 9625	350
Machine Type 9705	364
Machine Type 9707	377
Machine Type 9795	391
Machine Type 9804	404
Machine Type 9935	417
Machine Type 9945	431
Machine Type 9946	445
Machine Type 9953	458
Chapter 11. Additional Service Information	473
Security features	473
Hardware controlled Passwords	473
Operating system password	473
Vital product data	473
BIOS levels	473
Flash update procedures	473
Updating (flashing) BIOS from a diskette	474
Recovering from a POST/BIOS update failure	474
Power management	474
Automatic configuration and power interface (ACPI) BIOS	474
Automatic Power-On features	474
Appendix A. Notices	477
Television output notice	478
Trademarks	478
Television output notice	478

Match case Limit results 1 per page

Locate the battery. See "Locating parts on the system board" on page 95.

Remove the old battery.

Install the new battery.

Replace the computer cover, and connect the cables

Note:

When the computer is turned on for the ﬁrst time after battery replacement, an error message

might be displayed. This is normal after replacing the battery.

Turn on the computer and all attached devices.

Use the Setup Utility program to set the date and time and any passwords. See "Using the Setup

Utility" in the

User Guide

Replacing the power supply

Attention

Never remove the cover on a power supply or any part that has the following label attached.

Hazardous voltage, current, and energy levels are present inside any component that has this label attached.

There are no serviceable parts inside these components.

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 information on how to remove and replace the power supply.

To remove or replace the power supply:

Remove the cover. See "Removing the cover" on page 94.

Remove the drive bay assembly. See "Accessing system board components and drives" on page 96.

Disconnect all power supply cables from the system board. See "Locating parts on the system board"

on page 95.

Chapter 9 Replacing FRUs (Types 7057, 7062, 7092, 9342, 9344, 9354, 9426, 9486, 9624, 9707, 9787, 9804, 9945)