Lenovo 21NU0023GE Manuals

Manuals and User Guides for Lenovo 21NU0023GE. We have 1 Lenovo 21NU0023GE manual available for free PDF download: Hardware Maintenance Manual

Lenovo 21NU0023GE Hardware Maintenance Manual (104 pages)

Brand: Lenovo | Category: Laptop | Size: 39 MB

Table of Contents
3
About this Manual
5
Chapter 1. Safety Information
7
General Safety
7
Electrical Safety
7
Safety Inspection Guide
9
Handling Devices that Are Sensitive to Electrostatic Discharge
9
Grounding Requirements
10
Safety Notices (Multilingual Translations)
10
Chapter 2. Important Service Information
25
Strategy for Replacing Frus
25
Strategy for Replacing a Solid-State Drive
25
How to Use Error Message
26
Strategy for Replacing Frus for CTO, Special-Bid, and Standard Models
26
Product Definition
26
FRU Identification
26
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
34
Nvme Passwords
34
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
36
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
Lenovo Memory Self Repair
44
Chapter 5. Special Keys
45
Chapter 6. Locations
47
Locating Computer Controls and Connectors
47
Front View
47
Side View
49
Bottom View
50
Locating Frus and Crus
51
Major Frus and Crus
52
Miscellaneous Parts
54
Connector and Cable Guide
55
Looking up FRU Information
59
Chapter 7. FRU Replacement Notices
61
Service Tool Kit
61
Screw Notices
61
Retaining Serial Numbers
62
Restoring the Serial Number of the System Unit
62
Retaining the UUID
63
Reading or Writing the ECA Information
64
Chapter 8. Removing or Replacing a FRU
65
General Guidelines
65
Before Servicing the Computer
65
Disabling the Built-In Battery
65
Removing the Nano-SIM-Card and Nano-SIM-Card Tray
66
Base Cover Assembly
66
For Thinkpad X1 Carbon Gen 13
67
For Thinkpad X1 2-In-1 Gen 10
67
Applying Labels to the Base Cover Assembly
68
Built-In Battery
69
M.2 Solid-State Drive and M.2 Solid-State Drive Bracket
70
Wireless WAN Module and Its Bracket (for Selected Models)
71
Type One - 4G Wireless WAN Module
72
Type Two - 5G Wireless WAN Module
72
Type Three - Captive Bracket Only
73
Type Four - Captive Bracket and Wireless WAN Module Bracket
73
Antenna Cable Routing (for Selected Models)
74
Thermal Fan Assembly
77
Speaker Assembly
78
Trackpad / Haptic Touchpad, Fingerprint Reader, P Sensor and NFC Cable
79
Wireless WAN Antennas (for Selected Models)
80
Wireless WAN Antenna Cable Guide Rubber (for Selected Models)
81
Coin-Cell Battery
82
Fan Cable Guide
83
USB Bracket
84
NFC Sponge and NFC Module (for Selected Models)
84
Trackpad (for Selected Models)
85
Removal Steps
85
Installation Steps
87
Haptic Touchpad (for Selected Models)
88
Removal Steps
88
Installation Steps
90
System Board
92
Replace the System Board
93
How to Input the Product Information with Thinkpad System Board Self Repair Tool
94
LCD Unit
95
For Thinkpad X1 Carbon Gen 13
95
For Thinkpad X1 2-In-1 Gen 10
96
Keyboard Assembly
97
Appendix A. Notices
99
Appendix B. Abbreviation Table
101

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Lenovo 21NU0023GE Hardware Maintenance Manual (104 pages)

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