ThinkPad 20UD Manuals

Manuals and User Guides for ThinkPad 20UD. We have 1 ThinkPad 20UD manual available for free PDF download: Hardware Maintenance Manual

ThinkPad 20UD Hardware Maintenance Manual

ThinkPad 20UD Hardware Maintenance Manual (133 pages)

Brand: ThinkPad | Category: Laptop | Size: 61 MB

Table of Contents

Table of Contents
3
About this Manual
5
Chapter 1. Safety Information

7
Chapter 2. Important Service Information

25
Chapter 3. General Checkout

29
- What to Do First
  29
- Checkout Guide
  30
- Diagnosing Problems
  30
- Quick Test Programs
  30
- UEFI Diagnostic Program
  31
- Bootable Diagnostic Programs
  31
- Power System Checkout
  32
- Checking the Ac Power Adapter
  32
- Checking the Built-In Battery and Operational Charging
  33
- Checking the Coin-Cell Battery
  33
Chapter 4. Related Service Information

35
- Reset or Restore Windows
  35
- Passwords
  35
- Power-On Password
  35
- Hard Disk Password
  35
- Supervisor Password
  36
- System Management Password
  36
- How to Remove the Power-On Password
  37
- How to Remove the Hard Disk Password
  37
- How to Remove the System Management Password
  38
- Power Management
  38
- Sleep Mode
  38
- Hibernation Mode
  39
- Symptom-To-FRU Index
  39
- Numeric Error Codes
  40
- Error Messages
  41
- Beep Errors
  42
- Beep Symptoms
  44
- LCD-Related Symptoms
  44
- Intermittent Problems
  45
- Undetermined Problems
  45
Chapter 5. Special Keys

47
Chapter 6. Locations

49
- Locating Computer Controls, Connectors, and Indicators
  49
- Front
  49
- Base
  50
- Left
  51
- Right
  52
- Bottom
  52
- Rear
  53
- Locating Frus and Crus
  53
- Major Frus and Crus
  54
- LCD Frus
  57
- Miscellaneous Parts
  59
- Connector and Cable Guide
  59
- Looking up FRU Information
  67
Chapter 7. FRU Replacement Notices

69
- Service Tool Kit
  69
- Screw Notices
  69
- Retaining Serial Numbers
  70
- Restoring the Serial Number of the System Unit
  70
- Retaining the UUID
  71
Chapter 8. Removing or Replacing a FRU

73
Appendix A. Notices

127
Appendix B. Abbreviation and Acronym Table

129

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