User Manuals: ThinkPad T420 Business Laptop

User Manuals: ThinkPad T420 Business Laptop

Manuals and User Guides for ThinkPad T420 Business Laptop. We have 1 ThinkPad T420 Business Laptop manual available for free PDF download: Hardware Maintenance Manual

ThinkPad T420 Hardware Maintenance Manual

ThinkPad T420 Hardware Maintenance Manual (186 pages)

Brand: ThinkPad | Category: Laptop | Size: 22 MB

Table of Contents

Table of Contents
3
About this Manual

5
Chapter 1. Safety Information

7
Chapter 2. Important Service Information

29
Chapter 3. General Checkout

33
Chapter 4. Related Service Information

47
- Restoring the Factory Contents by Using Recovery Disc Set
  47
  - Copyright Lenovo 2012
    47
- Passwords
  48
  - Power-On Password
    48
  - Hard-Disk Password
    48
  - Supervisor Password
    49
  - How to Remove the Power-On Password
    49
  - How to Remove the Hard-Disk Password
    49
- Power Management
  51
  - Screen Blank Mode
    51
  - Sleep (Standby) Mode
    51
  - Hibernation Mode
    51
- Symptom-To-FRU Index
  53
  - Numeric Error Codes
    53
  - Numeric Error Codes
    54
  - Error Messages
    55
  - Beep Symptoms
    56
  - No-Beep Symptoms
    56
  - LCD-Related Symptoms
    56
  - Intermittent Problems
    58
  - Undetermined Problems
    58
Chapter 5. Status Indicators

59
Chapter 6. Fn Key Combinations

63
Chapter 7. FRU Replacement Notices

67
- Screw Notices
  67
- Retaining Serial Numbers
  68
Chapter 8. Removing and Replacing a FRU

71
Step Screw (Quantity)

94
- 1130 Smartcard
  98
- 1140 Modem Daughter Card (MDC)
  100
- 1150 Speaker Assembly
  101
- 1160 LCD Unit
  103
- 1170 Fan Assembly
  107
Color Torque Silver 0.181 Nm (1.85 Kgf-CM)

108
- 1180 Cpu
  111
- 1190 Base Cover Assembly and DC-In Connector Cable
  112
- 1200 Magnesium Structure Frame
  116
- 1210 System Board and Expresscard Slot Assembly
  118
- 1220 Msata Solid State Drive
  120
- Step Screw (Quantity)
  
  121
  - M2 × 3 MM, Wafer-Head, Nylon-Coated
    121
  - 2010 LCD Bezel Assembly
    122
    
    1010 Battery Pack
    122
  - 2020 LED Board
    123
  - Color
    123
    
    Torque
    123
  - 2030 Integrated Camera
    125
  - 2040 LCD Panel and LCD Cable
    127
  - 2050 Camera Cable
    129
  - 2060 Wireless LAN Antenna Assembly or Wireless LAN/WAN Antenna Assembly
    130
  - 2070 Hinges and LCD Rear Cover Assembly
    132
Chapter 9. Locations

135
- Front View
  135
- Rear View
  137
- Bottom View
  138
Chapter 10. Parts List

139
- Overall
  140
- LCD Frus
  161
- Keyboard
  166
- Miscellaneous Parts
  168
- Information about Ac Power Adapters
  170
- Power Cords
  171
- Recovery Discs
  172
- Common Service Tools
  179
Appendix A. Notices

181
- Electronic Emissions Notices
  182
- Trademarks
  183

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