Acer MP-340 20GB Technical Information Page 97
- Page / 141
- Table of contents
- TROUBLESHOOTING
- BOOKMARKS
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Chapter 4 89
Intermittent Problems
Intermittent system hang problems can be caused by a variety of reasons that have nothing to do with a
hardware defect, such as: cosmic radiation, electrostatic discharge, or software errors. FRU replacement
should be considered only when a recurring problem exists.
When analyzing an intermittent problem, do the following:
1. Run the diagnostic test for several times to isolate the problem.
2. If no error is detected, do not replace any FRU.
3. If any error is detected, replace the FRU. Rerun the test to verify that there are no more errors.
If an error is detected by the main battery test, see “Check the Power Adapter” on page 80
If an error is detected by the display test, see “Index of Symptom-to-FRU Error Message” on page
86 .
If an error is detected by the floppy disk drive test, see “External Diskette Drive Check” on page 78.
If an error is detected by the keyboard test, see “Keyboard or Auxiliary Input Device Check” on
page 79.
TM420.book Page 89 Monday, September 23, 2002 10:27 AM
- Acer TravelMate 420 Series 1
- Revision History 2
- Copyright 3
- Disclaimer 3
- Conventions 4
- Table of Contents 7
- System Specifications 9
- Expansion 10
- Keyboard and Pointing Device 10
- I/O Ports 10
- System Block Diagram 11
- Board Layout 12
- Outlook View 14
- Chapter 1 7 15
- 8 Chapter 1 16
- Chapter 1 9 17
- 10 Chapter 1 18
- Chapter 1 11 19
- Indicators 20
- Lock Keys 21
- Embedded Numeric Keypad 22
- Windows Keys 23
- Hot Keys 24
- Chapter 1 17 25
- The Euro Symbol 26
- Launch Keys 27
- E-Mail Detection 28
- Touchpad 29
- 22 Chapter 1 30
- Chapter 1 25 33
- DVD-ROM Interface 33
- 26 Chapter 1 34
- Chapter 1 31 39
- Electrical specification 39
- °C (storage package) 41
- 34 Chapter 1 42
- Mechanical Specification 42
- Memory Address Map 42
- I/O Address Map 42
- Environmental Requirements 42
- Chapter 1 35 43
- 36 Chapter 1 44
- IRQ Assignment Map 44
- Chapter 1 37 45
- DMA Channel Assignment 45
- 38 Chapter 1 46
- System Utilities 47
- Chapter 2 41 49
- Parameter Description 50
- Chapter 2 43 51
- Setting a Password 55
- Removing a Password 56
- Changing a Password 56
- 50 Chapter 2 58
- Chapter 2 51 59
- BIOS Flash Utility 60
- System Diagnostic Diskette 60
- Running Diagnostics Program 62
- Chapter 2 59 67
- 60 Chapter 2 68
- Chapter 3 69
- General Information 70
- Removing the Battery Pack 73
- Removing the Optical Module 74
- Removing the HDD module 74
- Removing the Memory 74
- Removing the Keyboard 75
- Disassembling the Main Unit 77
- Disassembling the LCD Module 82
- Disassembling the HDD Module 83
- 76 Chapter 3 84
- 5. Remove the ODD PCB board 84
- Troubleshooting 85
- System Check Procedures 86
- Memory Check 87
- Power System Check 87
- Check the Power Adapter 88
- Touchpad Check 89
- Display Check 89
- Sound Check 90
- Index of Error Messages 92
- Chapter 4 85 93
- Error Message List 93
- 86 Chapter 4 94
- LCD-Related Symptoms 94
- Indicator-Related Symptoms 94
- Power-Related Symptoms 94
- Chapter 4 87 95
- PCMCIA-Related Symptoms 95
- Memory-Related Symptoms 95
- Speaker-Related Symptoms 95
- Intermittent Problems 97
- Undetermined Problems 98
- POST Task Routines 99
- 92 Chapter 4 100
- Chapter 4 93 101
- 94 Chapter 4 102
- Chapter 4 95 103
- 96 Chapter 4 104
- Top View 105
- Chapter 5 105
- 98 Chapter 5 106
- Bottom View 107
- 100 Chapter 5 108
- Chapter 6 109
- Exploded Diagram 110
- LOGIC UP ASSY 111
- LOGIC UP ASSY (Wireless) 112
- LCD 14.1” 113
- DVD ASSY 114
- CD-ROM ASSY 114
- Combo ASSY 115
- 108 Chapter 6 116
- Chapter 6 109 117
- 110 Chapter 6 118
- Chapter 6 111 119
- 112 Chapter 6 120
- Chapter 6 113 121
- 114 Chapter 6 122
- Chapter 6 115 123
- 116 Chapter 6 124
- Chapter 6 117 125
- TravelMate 420 Series 126
- Appendix A 126
- Main Features 127
- Appendix A 120 128
- Test Compatible Components 129
- Microsoft 130
- XP Home Environment Test 130
- Appendix B 123 131
- 124 Appendix B 132
- XP Pro Environment Test 133
- 126 Appendix B 134
- 2000 Environment Test 135
- 128 Appendix B 136
- Online Support Information 137
- 130 Appendix C 138
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