Lenovo 21KX Manuals

Manuals and User Guides for Lenovo 21KX. We have 1 Lenovo 21KX manual available for free PDF download: Hardware Maintenance Manual

Lenovo 21KX Hardware Maintenance Manual

Lenovo 21KX Hardware Maintenance Manual (118 pages)

Brand: Lenovo | Category: Laptop | Size: 46.73 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

27
- What to Do First
  27
- Checkout Guide
  28
- Diagnosing Problems
  28
- Quick Test Programs
  29
- UEFI Diagnostic Program
  29
- Bootable Diagnostic Programs
  30
- Power System Checkout
  30
- Checking the Ac Power Adapter
  31
- Checking the Built-In Battery and Operational Charging
  31
- Checking the Coin-Cell Battery
  32
Chapter 4. Related Service Information

33
- Reset or Restore Windows
  33
- Use Lenovo Recovery Options
  33
- Use Window Recovery Options
  33
- Passwords
  33
- Power-On Password
  33
- Nvme Passwords
  33
- Supervisor Password
  34
- System Management Password
  34
- How to Remove the Power-On Password
  35
- How to Remove the Nvme Password
  35
- How to Remove the System Management Password
  35
- Power Management
  36
- Sleep Mode
  36
- Hibernation Mode
  37
- Symptom-To-FRU Index
  37
- Numeric Error Codes
  38
- Error Messages
  39
- Battery-Charge LED Indicator Diagnosis
  39
- Beep Symptoms
  41
- LCD-Related Symptoms
  42
- Intermittent Problems
  43
- Undetermined Problems
  43
Chapter 5. RAID

45
Chapter 6. Special Keys

49
Chapter 7. Locations

51
- Locating Computer Controls and Connectors
  51
- Front View
  51
- Side View
  52
- Rear View
  53
- Bottom
  53
- Locating Frus and Crus
  55
- Major Frus and Crus
  56
- LCD Frus and Crus
  59
- Miscellaneous Parts
  61
- Connector and Cable Guide
  61
- Looking up FRU Information
  64
Chapter 8. FRU Replacement Notices

65
- Service Tool Kit
  65
- Screw Notices
  65
- Retaining Serial Numbers
  66
- Restoring the Serial Number of the System Unit
  66
- Retaining the UUID
  67
- Reading or Writing the ECA Information
  68
Chapter 9. Removing or Replacing a FRU

69
- General Guidelines
  69
- Before Servicing the Computer
  69
- Disabling the Built-In Battery
  69
- Removing the Nano-SIM Card and Nano-SIM Card Tray
  70
- Keyboard
  70
- Base Cover Assembly
  72
- Applying Labels to the Base Cover Assembly
  73
- Memory Module
  74
- M.2 Solid-State Drive, Bracket and Thermal Pad
  75
- Built-In Battery
  77
- Wireless WAN Card (for Selected Models)
  78
- Type 1
  79
- Type 2
  80
- Thermal Fan Assembly
  81
- I/O Bracket
  83
- RJ45 Bracket
  83
- Coin-Cell Battery
  84
- Keyboard Bezel Assembly
  85
- Power Button with Fingerprint Reader and Bracket
  87
- Trackpad and Trackpad Cable
  89
- NFC Cable and NFC Board (for Selected Models)
  91
- Smart Card Reader and Smart Card Reader Cable (for Selected Models)
  92
- Speaker Assembly
  93
- Wireless WAN Antennas (for Selected Models)
  94
- System Board
  96
- Replace the System Board
  97
- How to Configure Keyboard Language in UEFI BIOS
  98
- LCD Hinge Caps
  98
- LCD Unit
  99
- Chassis Assembly
  101
- LCD Bezel
  101
- LCD Panel and Elastic Adhesive Tapes
  102
- Removal Steps
  102
- Installation Steps
  104
- How to Install New Color Profiles for LCD Panel with the Factory Color Calibration Feature
  105
- LCD Hinges
  105
- Camera-And-Microphone Module and Cable
  106
- Wireless LAN and Wireless WAN MIMO Antenna Assembly
  108
- Antenna Locations
  110
- LCD Cover Assembly
  111
Appendix A. Notices

113
Appendix B. Abbreviation Table

115

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