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Lenovo Laptop ThinkPad T480s

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T480s 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 101.

First Edition (January 2018)

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. GS-

35F-05925.

Contents

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

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

General safety . . . . . . . . . . . . . . . . 1

Electrical safety . . . . . . . . . . . . . . . . 1

Safety inspection guide . . . . . . . . . . . . . 2

Handling devices that are sensitive to electrostatic

discharge . . . . . . . . . . . . . . . . . . 3

Grounding requirements . . . . . . . . . . . . 4

Safety notices (multilingual translations) . . . . . . 4

Chapter 2. Important service

information . . . . . . . . . . . . . . . 21

Strategy for replacing FRUs . . . . . . . . . . 21

Strategy for replacing a solid-state drive . . . 21

Important notice for replacing a system

board . . . . . . . . . . . . . . . . . 22

How to use error message . . . . . . . . . 22

Strategy for replacing FRUs for CTO, special-bid,

and standard models. . . . . . . . . . . . . 22

Product definition . . . . . . . . . . . . 22

FRU identification . . . . . . . . . . . . 22

Chapter 3. General checkout . . . . . 25

What to do first . . . . . . . . . . . . . . . 25

Checkout guide . . . . . . . . . . . . . . . 26

Diagnosing problems . . . . . . . . . . . 26

Quick test programs . . . . . . . . . . . 27

UEFI diagnostic program . . . . . . . . . 27

Bootable diagnostic programs . . . . . . . 27

Power system checkout . . . . . . . . . . . 28

Checking the ac power adapter . . . . . . . 28

Checking the built-in battery and operational

charging . . . . . . . . . . . . . . . . 29

Checking the coin-cell battery . . . . . . . 29

Chapter 4. Related service

information . . . . . . . . . . . . . . . 31

Recovery information for the Windows 10

operating system . . . . . . . . . . . . . . 31

Resetting your computer . . . . . . . . . 31

Using advanced startup options . . . . . . 31

Recovering your operating system if Windows

10 fails to start . . . . . . . . . . . . . 31

Creating and using a recovery USB drive . . . 32

Passwords. . . . . . . . . . . . . . . . . 32

Power-on password . . . . . . . . . . . 33

Hard disk password . . . . . . . . . . . 33

Supervisor password . . . . . . . . . . . 33

How to remove the power-on password . . . 33

How to remove the hard disk password. . . . 34

Power management . . . . . . . . . . . . . 34

Sleep mode . . . . . . . . . . . . . . 35

Hibernation mode . . . . . . . . . . . . 35

Symptom-to-FRU index . . . . . . . . . . . 35

Numeric error codes . . . . . . . . . . . 36

Error messages . . . . . . . . . . . . . 37

Beep symptoms . . . . . . . . . . . . . 38

No-beep symptoms . . . . . . . . . . . 39

LCD-related symptoms . . . . . . . . . . 39

Intermittent problems. . . . . . . . . . . 40

Undetermined problems . . . . . . . . . 40

Chapter 5. Function keys . . . . . . . 41

Chapter 6. Locations . . . . . . . . . 43

Locating computer controls, connectors, and

indicators . . . . . . . . . . . . . . . . . 43

Front view . . . . . . . . . . . . . . . 43

Right-side view . . . . . . . . . . . . . 44

Left-side view. . . . . . . . . . . . . . 44

Bottom view . . . . . . . . . . . . . . 44

Rear view . . . . . . . . . . . . . . . 45

Status indicators . . . . . . . . . . . . 45

Locating FRUs and CRUs . . . . . . . . . . . 46

Major FRUs . . . . . . . . . . . . . . 48

LCD FRUs . . . . . . . . . . . . . . . 51

Miscellaneous parts . . . . . . . . . . . 52

Connector and cable guide . . . . . . . . 52

Looking up FRU information . . . . . . . . . . 56

Chapter 7. FRU replacement

notices . . . . . . . . . . . . . . . . . 57

Screw notices . . . . . . . . . . . . . . . 57

Retaining serial numbers . . . . . . . . . . . 58

Restoring the serial number of the system

unit . . . . . . . . . . . . . . . . . . 58

Retaining the UUID. . . . . . . . . . . . 59

Reading or writing the ECA information . . . . 59

Chapter 8. Removing or replacing a

FRU. . . . . . . . . . . . . . . . . . . 61

General guidelines . . . . . . . . . . . . . . 61

Before servicing the computer . . . . . . . . . 62

Disabling the built-in battery . . . . . . . . 62

Removing the nano-SIM card and nano-SIM-

card tray . . . . . . . . . . . . . . . . 62

Produktspecifikationer

Varumärke:	Lenovo
Kategori:	Laptop
Modell:	ThinkPad T480s
Färg på produkten:	Wit
Bredd:	65 mm
Djup:	230 mm
Höjd:	130 mm
Husmaterial:	Kunststof
Tillgångar:	300 W
Automatisk avstängning:	Ja
Mätglaset:	Ja
Klart larm:	Ja
Avtagbart lock:	Ja
AC-ingångsspänning:	230 V
Äggkapacitet:	3 eieren
Tjuvjakt funktion:	Nee