Lenovo 20BU Manuals

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

Lenovo 20BU Hardware Maintenance Manual

Lenovo 20BU Hardware Maintenance Manual (120 pages)

Brand: Lenovo | Category: Laptop | Size: 45.61 MB

Table of Contents

Table of Contents
3
About this Manual

5
Chapter 1. Safety Information

7
Chapter 2. Important Service Information

25
- Strategy for Replacing Frus
  25
- Strategy for Replacing Frus for CTO, Special-Bid, and Standard Models
  26
  - Product Definition
    26
  - FRU Identification
    26
Chapter 3. General Checkout

29
- What to Do First
  29
- Checkout Guide
  30
  - Lenovo Solution Center
    30
  - Quick Test Programs
    30
  - UEFI Diagnostic Program
    31
  - Bootable Diagnostic Programs
    31
- Power System Checkout
  32
Chapter 4. Related Service Information

35
- Restoring the Factory Contents by Using the Recovery Disc Set
  35
- Using the Windows Recovery Solutions (for Windows 8 and Windows 8.1 Only)
  36
- Passwords
  39
  - Power-On Password
    39
  - Hard Disk Password
    39
  - Supervisor Password
    40
  - How to Remove the Power-On Password
    40
  - How to Remove the Hard Disk Password
    41
- Power Management
  41
  - Screen Blank Mode (for the Windows 7 Operating System Only)
    41
- Sleep Mode
  41
  - Hibernation Mode
    42
- Symptom-To-FRU Index
  42
  - Numeric Error Codes
    43
  - Error Messages
    44
  - Beep Symptoms
    44
  - No-Beep Symptoms
    45
  - LCD-Related Symptoms
    45
  - Intermittent Problems
    46
  - Undetermined Problems
    46
Chapter 5. Status Indicators

47
- Copyright Lenovo
  47
Chapter 6. Function Keys

49
Chapter 7. Locations

51
- Locating Computer Controls, Connectors, and Indicators
  51
- Front View
  51
  - Rear View
    52
- Bottom View
  52
- Locating Frus and Crus
  53
  - Major Frus and Crus
    54
- LCD Frus
  56
  - Miscellaneous Parts and Other Frus
    58
- Looking up FRU Information
  59
Chapter 8. FRU Replacement Notices

61
- Screw Notices
  61
- Retaining Serial Numbers
  62
Chapter 9. Removing or Replacing a FRU

65
Appendix A. Notices

115
- Electronic Emissions Notices
  116
- Trademarks
  116
Appendix B. Abbreviation Table

117

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