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Item # 9421 FRUs 5 Diskette drive, 3.5" 1.44MB 2 Mode FDD with Bezel and cable (models) 5 Diskette drive, 3.5" 1.44MB 2 Mode FDD with Bezel and cable (models) 6 Bezel assembly, without IBM mark (all models) 7 Power switch/LED assembly (all models) 8 Speaker assembly, soldered terminals (all models) 9 Front audio/USB assembly (all models) 10 Hard disk drive, SATA 80GB 7200RPM/3Gb/8MB (models) 10 Hard disk drive, SATA 160GB 7200RPM/3Gb/8MB (models A3Q A1Q A2Q A4Q A5Q) 10 Hard disk drive, SATA 160GB 7200RPM/3Gb/8MB (models A3Q A1Q A2Q A4Q A5Q) 10 Hard disk drive, SATA 250GB 7200RPM/3Gb/8MB (models A6Q) 10 Hard disk drive, SATA 320GB 7200rpm SATA/8MB (models) 10 Hard disk drive, SATA 500GB 7200RPM/3Gb/s/8MB (models) 10 Hard disk drive, SATA 250GB 7200RPM/3Gb/8MB (models A6Q) 10 Hard disk drive, SATA 320GB 7200rpm SATA/8MB (models) 10 Hard disk drive, SATA 500GB 7200RPM/3Gb/s/8MB (models) 11 System board, Planar AMD RS780 mATX (TOWER &ROCKYS) (models A3Q A1Q A2Q A4Q A5Q A6Q) 11 System board, Planar AMD RS780 mATX GA Level - TPM Disable for Russia (models) FRU# 40Y9105 40Y9107 41R6243 41N5284 39P5023 41N8054 40Y9034 40Y9035 53Y6837 45K0408 45K0409 45K0410 40Y9036 87H4891 41X5582 71Y5724 71Y4994 11 System board, Planar AMD RS780 mATX GA Level - Support Phenom II X2 555 (models 91Z) 89Y1346 11 System board, Planar AMD RS780 mATX GA Level -Support Win7 and AM3 C2 CPU (models 91Z) 89Y1809 12 System fan, rear (all models) 41R6269 12 System fan, rear (all models) 43N9908 13 Power supply, ATX 280W (Robust, WW) (models A3Q A1Q A2Q A4Q A5Q A6Q) 41A9684 13 Power supply, ATX 280W 80% (Robust, WW, JP) (models A3Q A1Q A2Q A4Q A5Q A6Q) 41A9665 13 Power supply, ATX 310W (Robust, WW, JP) (models A3Q A1Q A2Q A4Q A5Q A6Q) 41A9726 13 Power supply, 220W (Robust, WW) (models A3Q A1Q A2Q A4Q A5Q A6Q) 41A9689 13 Power supply, 220W only for JP (models) 41A9697 13 Power supply, 220W 80% (Robust, WW, JP) (models A3Q A1Q A2Q A4Q A5Q A6Q) 41A9670 13 Power supply, 280W TFX ,Active PFC, (Robust, WW, JP) (models A3Q A1Q A2Q A4Q A5Q A6Q) 41A9705 CRU 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 N N N N 2 2 2 2 2 N N N N The FRUs listed in the following tables are not illustrated. Cover (all models) Retainer, Card Reader (all models) Front Fan AVC (all models) HDD Tray (all models) 9421 FRUs FRU# 41N8050 41R2913 41R4791 41R6291 CRU 2 2 2 2 262 ThinkCentre Hardware Maintenance Manual

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

Item

9421 FRUs

FRU#

CRU

Diskette drive, 3.5" 1.44MB 2 Mode FDD with Bezel and cable (models)

40Y9105

Diskette drive, 3.5" 1.44MB 2 Mode FDD with Bezel and cable (models)

40Y9107

Bezel assembly, without IBM mark (all models)

41R6243

Power switch/LED assembly (all models)

41N5284

Speaker assembly, soldered terminals (all models)

39P5023

Front audio/USB assembly (all models)

41N8054

Hard disk drive, SATA 80GB 7200RPM/3Gb/8MB (models)

40Y9034

Hard disk drive, SATA 160GB 7200RPM/3Gb/8MB (models A3Q A1Q A2Q A4Q A5Q)

40Y9035

Hard disk drive, SATA 160GB 7200RPM/3Gb/8MB (models A3Q A1Q A2Q A4Q A5Q)

53Y6837

Hard disk drive, SATA 250GB 7200RPM/3Gb/8MB (models A6Q)

45K0408

Hard disk drive, SATA 320GB 7200rpm SATA/8MB (models)

45K0409

Hard disk drive, SATA 500GB 7200RPM/3Gb/s/8MB (models)

45K0410

Hard disk drive, SATA 250GB 7200RPM/3Gb/8MB (models A6Q)

40Y9036

Hard disk drive, SATA 320GB 7200rpm SATA/8MB (models)

87H4891

Hard disk drive, SATA 500GB 7200RPM/3Gb/s/8MB (models)

41X5582

System board, Planar AMD RS780 mATX (TOWER &ROCKYS) (models A3Q A1Q

A2Q A4Q A5Q A6Q)

71Y5724

System board, Planar AMD RS780 mATX GA Level - TPM Disable for Russia (models)

71Y4994

System board, Planar AMD RS780 mATX GA Level - Support Phenom II X2 555

(models 91Z)

89Y1346

System board, Planar AMD RS780 mATX GA Level -Support Win7 and AM3 C2 CPU

(models 91Z)

89Y1809

System fan, rear (all models)

41R6269

System fan, rear (all models)

43N9908

Power supply, ATX 280W (Robust, WW) (models A3Q A1Q A2Q A4Q A5Q A6Q)

41A9684

Power supply, ATX 280W 80% (Robust, WW, JP) (models A3Q A1Q A2Q A4Q A5Q A6Q)

41A9665

Power supply, ATX 310W (Robust, WW, JP) (models A3Q A1Q A2Q A4Q A5Q A6Q)

41A9726

Power supply, 220W (Robust, WW) (models A3Q A1Q A2Q A4Q A5Q A6Q)

41A9689

Power supply, 220W only for JP (models)

41A9697

Power supply, 220W 80% (Robust, WW, JP) (models A3Q A1Q A2Q A4Q A5Q A6Q)

41A9670

Power supply, 280W TFX ,Active PFC, (Robust, WW, JP) (models A3Q A1Q A2Q A4Q

A5Q A6Q)

41A9705

The FRUs listed in the following tables are not illustrated.

9421 FRUs

FRU#

CRU

Cover (all models)

41N8050

Retainer, Card Reader (all models)

41R2913

Front Fan AVC (all models)

41R4791

HDD Tray (all models)

41R6291

262

ThinkCentre Hardware Maintenance Manual