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Lenovo ThinkCentre A51 Hardware Maintenance Manual - Page 334

Bezel, models, Chassis, Power, Supply, models, China, CTO-A, CTO-L, Cover, Serial, 160GB

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Machine Type 8427 2 1 3 4 5 6 11 9 7 8 10 Item # 8427 FRUs 1 Bezel (all models) 2 Chassis Asm (subd from 26K1113) (all models) 3 Power Supply 310 Watt (models 12U 21U 22U 22F 31U 31F CBU CCU CDU CEU CGU 23G 71G 72G 73G 74G 75G 76G 13U 13F 32U 32F 33U 41U 77G CHU CJU 14U 14F 24U 24F CKU 15U CTO 16U 16F 17U 17F 18U 18F) 3 Power Supply (China) 310 Watt (models 14S CTO-A CTO-L) 4 Cover Asm (all models) 5 HDD 40GB 7200 rpm Serial ATA (models 12U 21U 23G 71G 74G 13U 13F 32U 32F 77G 14U 14F 14S 24U 24F 15U CTO) 5 HDD 40GB 7200 rpm Serial ATA (models 12U 21U 23G 71G 74G 13U 13F 32U 32F 77G 14U 14F 14S 24U 24F 15U CTO) 5 HDD 40GB 7200 rpm Serial ATA (models 12U 21U 23G 71G 74G 13U 13F 32U 32F 77G 14U 14F 14S 24U 24F 15U CTO) 5 HDD 80GB 7200 rpm Serial ATA (models 22U 22F 31U 31F 72G 75G 33U 41U CTO 16U 16F 17U 17F 18U 18F) 5 HDD 80GB 7200 rpm Serial ATA (models 22U 22F 31U 31F 72G 75G 33U 41U CTO 16U 16F 17U 17F 18U 18F) 5 HDD 80GB 7200 rpm Serial ATA (models 22U 22F 31U 31F 72G 75G 33U 41U CTO 16U 16F 17U 17F 18U 18F) 5 HDD 160GB 7200 rpm Serial ATA (models 73G 76G CTO) 5 HDD 160GB 7200 rpm Serial ATA (models 73G 76G CTO) 5 HDD 160GB 7200 rpm Serial ATA (models 73G 76G CTO) FRU# 26K1116 26K1160 24R2574 24R2578 26K1115 71P7312 40Y8760 40Y9033 71P7293 40Y8761 40Y9034 71P7297 40Y8762 40Y9035 CRU * ** ** ** ** * * * * * * * * * 328 Hardware Maintenance Manual

Section	Page
Contents	5
Chapter 1. About this manual	7
Important Safety Information	7
Strategy for replacing FRUs for CTO, CMV, and GAV products	8
Product definition	8
FRU Identification for CTO, CMV, and GAV products	8
Using PEW	8
Using eSupport	9
Using the HMM	9
Important information about replacing RoHS compliant FRUs	9
Chapter 2. Safety information	11
General safety	11
Electrical safety	11
Safety inspection guide	13
Handling electrostatic discharge-sensitive devices	14
Grounding requirements	14
Safety notices (multi-lingual translations)	15
Chapter 3. General information	47
The Access IBM program	47
Additional information resources	47
Physical specifications	47
Types 8095, 8096, 8141, 8142, 8145, 8420, and 8421	48
Types 8097, 8143, 8144, 8146, 8422, 8423 and 8427	49
Types 8098, 8171, 8172, 8173, 8424, and 8425	50
Chapter 4. General Checkout	51
Problem determination tips	52
Chapter 5. Diagnostics using PC-Doctor for DOS	55
Starting PC-Doctor from the Rescue and Recovery workspace	55
Starting PC-Doctor from a diagnostic diskette or CD-ROM	56
Diagnostics program download	56
Navigating through the diagnostics programs	56
Running diagnostics tests	56
Test selection	57
Test results	57
Fixed disk advanced test (FDAT)	57
Quick and Full erase - hard drive	59
Viewing the test log	60
Chapter 6. Using the Setup Utility	61
Starting the Setup Utility program	61
Viewing and changing settings	61
Exiting from the Setup Utility program	61
Using passwords	61
Password considerations	62
User Password	62
Administrator Password	62
IDE Drive User Password	62
IDE Drive Master Password	62
Setting, changing, and deleting a password	63
Using Security Profile by Device	63
Selecting a startup device	64
Selecting a temporary startup device	64
Changing the startup device sequence	64
Advanced settings	64
Chapter 7. Symptom-to-FRU Index	65
Hard disk drive boot error	65
Power Supply Errors	65
Diagnostic error codes	67
Beep symptoms	88
No-beep symptoms	90
POST error codes	91
Miscellaneous error messages	94
Undetermined problems	96
Chapter 8. Replacing FRUs (Types 8095, 8141, 8142, 8145, 8420, and 8421)	97
Locating controls and connectors on the front of the computer	97
Locating connectors on the rear of the computer	98
Removing the cover	98
Locating components	100
Identifying parts on the system board	101
Removing and replacing memory	102
Removing and replacing a PCI adapter	103
Removing and replacing the battery	104
Removing and replacing the power supply	105
Removing and replacing the system board	107
Removing and replacing the microprocessor	109
Removing and replacing the hard disk drive	115
Removing and replacing the optical drive	116
Removing and replacing the diskette drive	117
Removing and replacing the fan assembly	118
Closing the cover and connecting cables	119
Chapter 9. Replacing FRUs (Types 8143, 8144, 8146, 8422, 8423, and 8427)	121
Locating controls and connectors on the front of the computer	121
Locating connectors on the rear of the computer	122
Removing the cover	122
Locating components	123
Identifying parts on the system board	124
Removing and replacing memory	125
Removing and replacing a PCI adapter	126
Removing and replacing the battery	127
Removing and replacing the power supply	127
Removing and replacing the system board	130
Removing and replacing the microprocessor	132
Removing and replacing the hard disk drive	137
Removing and replacing the optical drive	138
Removing and replacing the diskette drive	139
Removing and replacing the fan assembly	140
Replacing the cover and connecting the cables	141
Chapter 10. Replacing FRUs (Types 8098, 8171, 8172, 8173, 8424, and 8425)	143
Locating controls and connectors on the front of the computer	143
Locating connectors on the rear of the computer	144
Opening the cover	144
Locating components	145
Identifying parts on the system board	146
Removing and replacing memory	147
Replacing a PCI adapter	148
Removing and replacing the battery	149
Removing and replacing the power supply	149
Removing and replacing the system board	152
Removing and replacing the microprocessor	153
Removing and replacing the hard disk drive	158
Removing and replacing the optical drive	159
Removing and replacing the diskette drive	160
Removing and replacing the fan assembly	160
Removing and replacing the internal speaker	163
Removing and replacing the power button and LED assembly	163
Closing the cover and connecting cables	165
Chapter 11. FRU lists	167
Machine Type 8095	167
Machine Type 8098	173
Machine Type 8141	178
Machine Type 8142	193
Machine Type 8143	204
Machine Type 8144	220
Machine Type 8145	230
Machine Type 8146	237
Machine Type 8171	243
Machine Type 8172	261
Machine Type 8173	271
Machine Type 8420	278
Machine Type 8421	286
Machine Type 8422	293
Machine Type 8423	304
Machine Type 8424	316
Machine Type 8425	325
Machine Type 8427	334
Chapter 12. Additional Service Information	343
Security features	343
Hardware controlled Passwords	343
Operating system password	343
Vital product data	343
Management Information Format (MIF)	343
BIOS levels	344
Flash update procedures	344
Updating (flashing) BIOS from a diskette or CD-ROM	344
Updating (flashing) BIOS from your operating system	344
Recovering from a POST/BIOS update failure	345
Power management	346
Automatic configuration and power interface (ACPI) BIOS	346
Automatic Power-On features	346
Recovering software using the Rescue and Recovery program	347
Starting the Rescue and Recovery workspace	347
Appendix. Notices	349
Television output notice	350

Match case Limit results 1 per page

Machine

Type

8427

Item

8427

FRUs

FRU#

CRU

Bezel

(all

models)

26K1116

Chassis

Asm

(subd

from

26K1113)

(all

models)

26K1160

Power

Supply

310

Watt

(models

12U

21U

22U

22F

31U

31F

CBU

CCU

CDU

CEU

CGU

23G

71G

72G

73G

74G

75G

76G

13U

13F

32U

32F

33U

41U

77G

CHU

CJU

14U

14F

24U

24F

CKU

15U

CTO

16U

16F

17U

17F

18U

18F)

24R2574

Power

Supply

(China)

310

Watt

(models

14S

CTO-A

CTO-L)

24R2578

Cover

Asm

(all

models)

26K1115

HDD

40GB

7200

rpm

Serial

ATA

(models

12U

21U

23G

71G

74G

13U

13F

32U

32F

77G

14U

14F

14S

24U

24F

15U

CTO)

71P7312

HDD

40GB

7200

rpm

Serial

ATA

(models

12U

21U

23G

71G

74G

13U

13F

32U

32F

77G

14U

14F

14S

24U

24F

15U

CTO)

40Y8760

HDD

40GB

7200

rpm

Serial

ATA

(models

12U

21U

23G

71G

74G

13U

13F

32U

32F

77G

14U

14F

14S

24U

24F

15U

CTO)

40Y9033

HDD

80GB

7200

rpm

Serial

ATA

(models

22U

22F

31U

31F

72G

75G

33U

41U

CTO

16U

16F

17U

17F

18U

18F)

71P7293

HDD

80GB

7200

rpm

Serial

ATA

(models

22U

22F

31U

31F

72G

75G

33U

41U

CTO

16U

16F

17U

17F

18U

18F)

40Y8761

HDD

80GB

7200

rpm

Serial

ATA

(models

22U

22F

31U

31F

72G

75G

33U

41U

CTO

16U

16F

17U

17F

18U

18F)

40Y9034

HDD

160GB

7200

rpm

Serial

ATA

(models

73G

76G

CTO)

71P7297

HDD

160GB

7200

rpm

Serial

ATA

(models

73G

76G

CTO)

40Y8762

HDD

160GB

7200

rpm

Serial

ATA

(models

73G

76G

CTO)

40Y9035

328

Hardware

Maintenance

Manual