Lenovo 21LS007AAU Manuals

Manuals and User Guides for Lenovo 21LS007AAU. We have 1 Lenovo 21LS007AAU manual available for free PDF download: Hardware Maintenance Manual

Lenovo 21LS007AAU Hardware Maintenance Manual (106 pages)

Brand: Lenovo | Category: Laptop | Size: 43 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
30
Checking the Built-In Battery and Operational Charging
31
Checking the Coin-Cell Battery
31
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
Lenovo Memory Self Repair (for Intel Models Only)
44
Chapter 5. Special Keys
45
Chapter 6. Locations
47
Locating Computer Controls and Connectors
47
Front
47
Left and Right
48
Bottom
49
Locating Frus and Crus
50
Major Frus and Crus
51
LCD Frus and Crus
53
Miscellaneous Parts
55
Connector and Cable Guide
55
Looking up FRU Information
58
Chapter 7. FRU Replacement Notices
59
Service Tool Kit
59
Screw Notices
59
Retaining Serial Numbers
60
Restoring the Serial Number of the System Unit
60
Retaining the UUID
61
Reading or Writing the ECA Information
62
Chapter 8. Removing or Replacing a FRU
63
General Guidelines
63
Before Servicing the Computer
63
Disabling the Built-In Battery
63
Removing the Nano-SIM Card and Nano-SIM-Card Tray
64
Base Cover Assembly
64
Applying Labels to the Base Cover Assembly
65
Solid-State Drive and Its Bracket (for Selected Models)
66
Type 1
67
Type 2
67
Wireless WAN Module and Its Bracket (for Selected Models)
68
5G Models
68
4G Models
69
Built-In Battery
70
Thermal Fan Assembly
71
I/O Board
72
Power Button with or Without Fingerprint Reader
73
System Board I/O Bracket
74
I/O Cable
75
Wireless WAN Antennas (for Selected Models)
75
Wireless WAN Antenna Cable Guide
76
Speaker Assembly
77
LCD Unit and Wireless LAN Antenna Cable Guide
78
Speaker Cable Guide
79
Smart Card Reader (for Selected Models)
80
Dummy Smart Card Reader (for Selected Models)
81
Coin-Cell Battery
81
Smart Card Reader-Trackpad-NFC Cable (for Selected Models)
82
Trackpad
83
NFC Card
85
System Board
86
Replace the System Board
87
How to Input the Product Information with Thinkpad System Board Self Repair Tool
88
How to Configure Keyboard Language in UEFI BIOS
88
LCD Unit
88
Keyboard Assembly
90
LCD Bezel Sheet
91
Camera Shutter or Dummy Camera Shutter
91
Strip Cover
92
Hinge Cap
92
LCD Hinges
93
LCD Panel, LCD Cable and Elastic Adhesive Tapes
94
How to Install New Color Profiles after Replacing the LCD Panel
96
Camera Module and Cable (for Selected Models)
96
Wireless LAN Antenna Assembly
97
Antenna Locations
98
LCD Cover Assembly
99
Appendix A. Notices
101
Appendix B. Abbreviation Table
103

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