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20NC
Hardware maintenance manual
Lenovo 20NC Hardware Maintenance Manual
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User manual
(106 pages)
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Contents
Table of Contents
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Table of Contents
Table of Contents
About this Manual
Chapter 1. Safety Information
General Safety
Electrical Safety
Safety Inspection Guide
Handling Devices that Are Sensitive to Electrostatic Discharge
Grounding Requirements
Safety Notices (Multilingual Translations)
Chapter 2. Important Service Information
Strategy for Replacing Frus
Strategy for Replacing a Hard Disk Drive or a Solid-State Drive
Important Notice for Replacing a System Board
How to Use Error Codes
Strategy for Replacing Frus for CTO, Special-Bid, and Standard Models
Product Definition
FRU Identification
Chapter 3. General Checkout
What to Do First
Checkout Guide
Diagnosing Problems
Quick Test Programs
UEFI Diagnostic Program
Bootable Diagnostic Programs
Power System Checkout
Checking the Ac Power Adapter
Checking Operational Charging
Checking the Built-In Battery and Operational Charging
Checking the Coin-Cell Battery
Chapter 4. Related Service Information
Recovery Overview for the Windows 10 Operating System
Resetting Your Computer
Using Advanced Startup Options
Recovering Your Operating System if Windows 10 Fails to Start
Creating and Using a Recovery USB Drive
Passwords
Power-On Password
Hard Disk Password
Supervisor Password
How to Remove the Power-On Password
How to Remove the Hard Disk Password
Power Management
Sleep Mode
Hibernation Mode
Symptom-To-FRU Index
Numeric Error Codes
Error Messages
Beep Errors
No-Beep Symptoms
LCD-Related Symptoms
Intermittent Problems
Undetermined Problems
Chapter 5. Special Keys
Chapter 6. Locations
Locating Computer Controls, Connectors, and Indicators
Front
Base
Left
Right
Locating Frus and Crus
Major Frus and Crus
LCD Frus and Crus
Miscellaneous Parts
Connector and Cable Guide
Looking up FRU Information
Chapter 7. FRU Replacement Notices
Service Tool Kit
Screw Notices
Retaining Serial Numbers
Restoring the Serial Number of the System Unit
Retaining the UUID
Chapter 8. Removing or Replacing a FRU
General Guidelines
Before Servicing the Computer
Disabling the Built-In Battery
Removing the Microsd Card
1010 Base Cover Assembly
1020 Built-In Battery
1030 M.2 Solid-State Drive and Brackets
1040 Thermal Fan Assembly
1050 Memory Module
1060 Internal Storage Drive, Cable and Bracket
1070 Wireless LAN Card
1080 Coin-Cell Battery
1090 Keyboard
1100 USB Card Cable
1110 USB Card
1120 Speaker Assembly
1130 Fingerprint Reader Cable, Bracket and Card (for E590/R590)
1140 Trackpad and Cable
1150 System Board
1160 LCD Unit
1170 Keyboard Bezel Assembly
2010 LCD Bezel
2020 LCD Panel
2030 LCD Hinges
2040 Camera/Microphone Module
2050 LCD Cable
2060 Wireless-LAN Antenna Assembly
2070 LCD Cover Assembly
Appendix A. Notices
Appendix B. Abbreviation and Acronym Table
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E590, R590, and E595
Hardware Maintenance Manual
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