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Lenovo ThinkCentre M55 Hardware Maintenance Manual - Page 77

Beep Symptom, FRU/Action, Run Setup - beep codes

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If an external ROM module does not properly checksum to zero. An external ROM can also issue audible tones, usually consisting of one long tone followed by a series of short tones. Use the following table to diagnose beep symptoms. Beep Symptom 1-1-3 CMOS read-write error 1-2-2-3 ROM BIOS check error 1-2-1 Programmable Interval Timer failed 1-2-2 DMA Initialization failed 1-2-3 DMA page register write/read failed 1-2-4 RAM refresh verification failed 4-4-4-4 1st 64K RAM test failed 1-3-2 1st 64K RAM parity test failed 2-2-3-1 Interrupt vector loading test failed 2-1-1 Secondary DMA register failed 2-1-2 Primary DMA register failed 2-1-3 Primary interrupt mask register failed 2-1-4 Secondary interrupt mask register failed 2-2-1 Interrupt vector loading failed 1-3-1-3 Keyboard controller failed 2-2-3 CMOS power failure and checksum checks failed 2-2-4 CMOS configuration info validation failed 2-3-1 Screen initialization failed 2-3-2 Screen memory failed 2-3-3 Screen retrace failed 1-2 Search for video ROM failed All other beep code sequences Continuous beep Repeating short beeps FRU/Action 1. Run Setup 2. System Board System board System board System board System board 1. Memory module 2. System Board 1. Memory module 2. System Board 1. Memory module 2. Processor 3. System Board System board System board System board System board System board System board 1. System Board 2. Keyboard 1. Battery 2. System Board 1. Battery 2. System Board 1. Jumper on J28 2. System Board System board System board System board System board System Board 1. Keyboard stuck key 2. Keyboard Cable 3. System Board Chapter 7. Symptom-to-FRU Index 71

Section	Page
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
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	13
Grounding requirements	14
Safety notices (multi-lingual translations)	14
Chapter 3. General information	37
The ThinkVantage™ Productivity Center program	37
Additional information resources	37
Physical specifications	37
Types 8009, 8791, 8795, 8799, 8803, and 8807	37
Types 6488, 8010, 8792, 8796, 8800, 8804, 8808, and 9168	38
Types 8011, 8793, 8797, 8801, 8805, 8810, and 9166	39
Types 6487, 8012, 8794, 8798, 8802, 8806, 8811, and 9167	40
Chapter 4. General Checkout	43
Problem determination tips	44
Chapter 5. Diagnostics	47
PC-Doctor for Windows	47
PC-Doctor for DOS	47
Creating a diagnostic CD image	47
Creating diagnostic diskettes	48
Running diagnostics from the CD or diskettes	48
Running diagnostics from the Rescue and Recovery workspace	48
PC-Doctor for Windows PE	49
Running diagnostics from the Rescue and Recovery workspace	49
Navigating through the diagnostics programs	49
Running tests	49
Test results	50
Fixed disk advanced test (FDAT)	50
Quick and Full erase - hard drive	52
Viewing the test log	52
Chapter 6. Using the Setup Utility	53
Starting the Setup Utility program	53
Viewing and changing settings	53
Exiting from the Setup Utility program	53
Using passwords	53
User Password	53
Administrator Password	54
Setting, changing, and deleting a password	54
Selecting a startup device	54
Selecting a temporary startup device	54
Changing the startup device sequence	54
Advanced settings	55
Chapter 7. Symptom-to-FRU Index	57
Hard disk drive boot error	57
Power Supply Errors	57
Diagnostic error codes	58
Beep symptoms	76
No-beep symptoms	78
POST error codes	78
Miscellaneous error messages	80
Undetermined problems	82
Chapter 8. FRU lists	85
Machine Type 6487	85
Machine Type 6488	96
Machine Type 8009	106
Machine Type 8010	116
Machine Type 8011	120
Machine Type 8012	129
Machine Type 8791	141
Machine Type 8792	151
Machine Type 8793	161
Machine Type 8794	171
Machine Type 8795	181
Machine Type 8796	190
Machine Type 8797	200
Machine Type 8798	209
Machine Type 8799	219
Machine Type 8800	231
Machine Type 8801	243
Machine Type 8802	254
Machine Type 8803	265
Machine Type 8804	277
Machine Type 8805	286
Machine Type 8806	296
Machine Type 8807	305
Machine Type 8808	318
Machine Type 8810	335
Machine Type 8811	349
Machine Type 9166	368
Machine Type 9167	372
Machine Type 9168	376
Chapter 9. Additional Service Information	381
Security features	381
Hardware controlled Passwords	381
Operating system password	381
Vital product data	381
BIOS levels	381
Flash update procedures	381
Updating (flashing) BIOS from a diskette or CD-ROM	382
Updating (flashing) BIOS from your operating system	382
Recovering from a POST/BIOS update failure	382
Power management	383
Automatic configuration and power interface (ACPI) BIOS	383
Automatic Power-On features	383
Recovering software using the Rescue and Recovery program	383
Appendix A. Notices	385
Television output notice	386

Match case Limit results 1 per page

If an external ROM module does not properly checksum to zero. An external ROM can also issue audible

tones, usually consisting of one long tone followed by a series of short tones.

Use the following table to diagnose beep symptoms.

Beep Symptom

FRU/Action

1-1-3

CMOS read-write error

Run Setup

System Board

1-2-2-3

ROM BIOS check error

System board

1-2-1

Programmable Interval Timer failed

System board

1-2-2

DMA Initialization failed

System board

1-2-3

DMA page register write/read failed

System board

1-2-4

RAM refresh veriﬁcation failed

Memory module

System Board

4-4-4-4

1st 64K RAM test failed

Memory module

System Board

1-3-2

1st 64K RAM parity test failed

Memory module

Processor

System Board

2-2-3-1

Interrupt vector loading test failed

System board

2-1-1

Secondary DMA register failed

System board

2-1-2

Primary DMA register failed

System board

2-1-3

Primary interrupt mask register failed

System board

2-1-4

Secondary interrupt mask register failed

System board

2-2-1

Interrupt vector loading failed

System board

1-3-1-3

Keyboard controller failed

System Board

Keyboard

2-2-3

CMOS power failure and checksum checks failed

Battery

System Board

2-2-4

CMOS conﬁguration info validation failed

Battery

System Board

2-3-1

Screen initialization failed

Jumper on J28

System Board

2-3-2

Screen memory failed

System board

2-3-3

Screen retrace failed

System board

1-2

Search for video ROM failed

System board

All other beep code sequences

System board

Continuous beep

System Board

Repeating short beeps

Keyboard stuck key

Keyboard Cable

System Board

Chapter 7

Symptom-to-FRU Index