E490 E495 Hmm En

E490, E495, and R490 Hardware Maintenance Manual

Note: Before using this information and the product it supports, be sure to read the general information under Appendix A 'Notices' on page 97.

Second Edition (April 2019)

© Copyright Lenovo 2018, 2019.

LIMITED AND RESTRICTED RIGHTS NOTICE: If data or software is delivered pursuant to a General Services Administration 'GSA' contract, use, reproduction, or disclosure is subject to restrictions set forth in Contract No. GS35F-05925.

Contents

About this manual . . . . . . . . . . . . iii

Chapter 1. Safety information. . . . . . 1

General safety

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Electrical safety .

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Safety inspection guide.

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Handling devices that are sensitive to electrostatic discharge

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Grounding requirements

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Safety notices (multilingual translations)

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Chapter 2. Important service information. . . . . . . . . . . . . . . 21

Strategy for replacing FRUs

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Strategy for replacing a hard disk drive, a hybrid drive, or a solid-state drive .

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Important notice for replacing a system board .

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How to use error message .

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Strategy for replacing FRUs for CTO, special bid model, and standard models.

Product definition

FRU identification

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Chapter 3. General checkout . . . . . 25

What to do first

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Checkout guide .

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Diagnosing problems .

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Quick test programs

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UEFI diagnostic program

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Bootable diagnostic programs

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Power system checkout

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Checking the ac power adapter .

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Checking the built-in battery and operational charging .

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Checking the coin-cell battery

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Chapter 4. Related service information. . . . . . . . . . . . . . . 31

Restoring the factory contents by using the

Recovery Disc Set .

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Recovery overview for the Windows 10 operating system

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Resetting your computer

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Using advanced startup options

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Recovering your operating system if Windows

10 fails to start

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Creating and using a recovery USB drive

Passwords.

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Power-on password . . . . . . . . . . . 34 Hard disk password . . . . . . . . . . . 34 Supervisor password . . . . . . . . . . . 34 How to remove the power-on password . . . 35 How to remove the hard disk password. . . . 35 management . . . . . . . . . . . . . 36 Sleep mode . . . . . . . . . . . . . . 36 Hibernation mode . . . . . . . . . . . . 36 index . . . . . . . . . . . 37 Numeric error codes . . . . . . . . . . . 37 Error messages . . . . . . . . . . . . . 39 Beep errors. . . . . . . . . . . . . . . 39 No-beep symptoms . . . . . . . . . . . 41 LCD-related symptoms . . . . . . . . . . 41 Intermittent problems. . . . . . . . . . . 41 Undetermined problems . . . . . . . . . 42
Power
Symptom-to-FRU
Chapter 5. Function keys . . . . . . . 43
Chapter 6. Locations . . . . . . . . . 45
Locating computer controls, connectors, and
indicators . . . . . . . . . . . . . . . . . 45
Base . . . . . . . . . . . . . . . . . 46 Left . . . . . . . . . . . . . . . . . . 47 Right . . . . . . . . . . . . . . . . . 48
Locating FRUs and CRUs . . . . . . . . . . . 48
Major FRUs . . . . . . . . . . . . . . 49 LCD FRUs . . . . . . . . . . . . . . . 51 Miscellaneous parts . . . . . . . . . . . 53 Connector and cable guide . . . . . . . . 53 Looking up FRU information . . . . . . . . . . 55 Chapter 7. FRU replacement
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notices . .

Table Caption: This table appears to be an index or table of contents for a technical manual, likely for a computer or electronic device, detailing sections on passwords, system management, error troubleshooting, hardware locations, and component replacement. It also includes information on function keys, power-related symptoms, and various error codes and symptoms.

1010 Keyboard . . . . . . . . . . . . .	. 63 . .	1160 LCD unit . . . . . . . . . . . . . 85
1020 Base cover assembly . . . . . . . .	. 65 1170 Keyboard bezel assembly	. . . . . . . . 86
1030 Hard disk drive, cable, and bracket . . .	. 67 2010 LCD bezel assembly.	. . . . . . . . . . 86
1040 Fingerprint reader card, cable, and bracket (for selected models of E490/R490) . . . . .	. 69 2020 LCD panel. . . 2030 Hinge kit . . .	. . . . . . . . . . . . 87 . . . . . . . . . . . . 89
1050 Memory module . . . . . . . . . . 1060 M.2 solid-state drive and brackets . . .	. 70 . 70 2040 Integrated camera and microphone combo card . . . . . . .	. . . . . . . . . . . . 92
1070 I/O card. . . . . . . . . . . . . .	. 73 2050	LED and camera cable assembly . . . . . . 92
1080 Speaker assembly . . . . . . . . .	. 74 2060 Wireless	LAN antennas assembly and LCD
1090 Wireless LAN card . . . . . . . . . 1110 Built-in battery . . . . . . . . . . .	. 75 . 76 rear cover assembly . . . . . . . .	. . . . . 93 . 97
1120 Coin-cell battery . . . . . . . . . .	. 77 Appendix A. Notices. .	. . . . . . .
1130 Thermal fan assembly . . . . . . . . 1140 Trackpad cable and	. 78 Appendix B. Abbreviation and acronym table . . . . . . . . .	99
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trackpad . . . . .	. 80

Table Caption: This table appears to be a parts list for a laptop, with item numbers, descriptions, and corresponding page numbers.

About this manual

This manual contains service and reference information for the following ThinkPad ® products.

ThinkPad R490

Machine type (MT) 20NA

ThinkPad E490

Machine types (MT) 20N8 and 20N9

ThinkPad E495

Machine type (MT) 20NE

Use this manual along with the advanced diagnostic tests to troubleshoot problems.

Important: This manual is intended only for trained service technicians who are familiar with ThinkPad products. Use this manual along with the advanced diagnostic tests to troubleshoot problems effectively. Before servicing a ThinkPad product, be sure to read all the information under Chapter 1 'Safety information' on page 1 and Chapter 2 'Important service information'