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20L5
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Removal
steps of
the system
board
Step
Screw (quantity)
Color
Torque
15
M2 ×
3 mm,
flat
head, nylon-coated
(6)
Black
0.181 Nm
(1.85 kgf-cm)
When
installing:
Ensure
that
the connectors
are attached
firmly.
Chapter 9
.
Removing or
replacing a
FRU
87
92
94
Table of Contents
Main Page
default chapter
3
Table of Contents
3
About this Manual
5
Chapter 1. Safety Information
7
General Safety
7
Electrical Safety
7
Safety Inspection Guide
8
Handling Devices that Are Sensitive to Electrostatic Discharge
9
Grounding Requirements
10
Safety Notices (Multilingual Translations)
10
Chapter 2. Important Service Information
27
Strategy for Replacing Frus
27
Strategy for Replacing a Hard Disk Drive or a Solid-State Drive
27
Important Notice for Replacing a System Board
28
How to Use Error Message
28
Strategy for Replacing Frus for CTO, Special-Bid, and Standard Models
28
Product Definition
28
FRU Identification
28
Chapter 3. General Checkout
31
What to Do First
31
Checkout Guide
32
Diagnosing Problems
32
Quick Test Programs
33
UEFI Diagnostic Program
33
Bootable Diagnostic Programs
33
Power System Checkout
34
Checking the Ac Power Adapter
35
Checking the Removable Battery and the Operational Charging
35
Checking the Coin-Cell Battery
36
Chapter 4. Related Service Information
37
Recovery Information for the Windows 10 Operating System
37
Resetting Your Computer
37
Using Advanced Startup Options
37
Recovering Your Operating System if Windows 10 Fails to Start
38
Creating and Using a Recovery USB Drive
38
Passwords
39
Power-On Password
39
Hard Disk Password
39
Supervisor Password
39
How to Remove the Power-On Password
40
How to Remove the Hard Disk Password
40
Power Management
41
Sleep Mode
41
Hibernation Mode
41
Symptom-To-FRU Index
41
Numeric Error Codes
42
Error Messages
43
Beep Errors
44
No-Beep Symptoms
46
LCD-Related Symptoms
46
Intermittent Problems
47
Undetermined Problems
47
Chapter 5. Status Indicators
49
Chapter 6. Using the Special Keys
51
Chapter 7. Locations
53
Locating Computer Controls, Connectors, and Indicators
53
Front View
53
Left-Side View
54
Right-Side View
54
Bottom View
55
Locating Frus and Crus
55
Major Frus and Crus
57
LCD Frus
59
Miscellaneous Parts
60
Connector and Cable Guide
60
Looking up FRU Information
64
Chapter 8. FRU Replacement Notices
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
67
Chapter 9. Removing or Replacing a FRU
69
General Guidelines
69
Disabling the Built-In Battery
70
1010 Removable Battery
70
1020 Nano-SIM Card
71
1030 Base Cover Assembly
71
1040 Memory Module
74
1050 Internal Storage Drive
75
1060 Wireless-WAN Card
79
1070 Wireless-LAN Module
79
1080 M.2 Solid-State Drive in the Wireless-WAN-Card Slot
80
1090 Keyboard
81
1100 Coin-Cell Battery
83
1110 Speaker Assembly
84
1120 Built-In Battery
85
1130 Smart-Card Reader Assembly
86
1140 I/O Bracket and RJ45 Bracket
87
1150 Thermal Fan Assembly
88
1160 Trackpad and Trackpad Cable
90
1170 System Board
91
1180 Power-Button Card
94
1190 Fingerprint-Reader Card
94
1200 NFC Module
96
1210 LCD Unit
96
1220 Keyboard Bezel Assembly
98
2010 LCD Bezel Sheet
99
2020 LCD Panel
100
2030 LCD Hinge Assembly
102
2040 Camera/Microphone Module
104
2050 Camera and LED Cable, and LCD Cable
105
2060 Wireless-LAN/WAN Antenna Assembly and LCD Rear-Cover Assembly
106
Appendix A. Notices
109
Electronic Emissions Notices
110
Trademarks
110
Appendix B. Abbreviation Table
111
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