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Aboutthismanual

ThismanualcontainsserviceandreferenceinformationforthefollowingThinkPad

products.

ThinkPadT540p

MachineTypes(MT)20BEand20BF

ThinkPadW540

MT20BGand20BH

ThinkPadW541

MT20EFand20EG

Usethismanualalongwiththeadvanceddiagnosticteststotroubleshootproblems.

Important:ThismanualisintendedonlyfortrainedservicetechnicianswhoarefamiliarwithThinkPad

products.Usethismanualalongwiththeadvanceddiagnosticteststotroubleshootproblemseffectively.

BeforeservicingaThinkPadproduct,besuretoreadalltheinformationunderChapter1“Safetyinformation”

onpage1andChapter2“Importantserviceinformation”onpage19.

iii

1 2 3 4 5 6 7 8 9 10 ... 115 116

HardwareMaintenanceManual 1
ThirdEdition(November2014) 2
Contents 3
AppendixA.Notices.........105 4
Aboutthismanual 5
Chapter1.Safetyinformation 7
Safetyinspectionguide 8
Chapter1.Safetyinformation3 9
Groundingrequirements 10
Chapter1.Safetyinformation5 11
6HardwareMaintenanceManual 12
.Safetyinformation7 13
Chapter1.Safetyinformation9 15
VORSICHT 17
.Safetyinformation11 17
12HardwareMaintenanceManual 18
.Safetyinformation13 19
14HardwareMaintenanceManual 20
.Safetyinformation15 21
16HardwareMaintenanceManual 22
.Safetyinformation17 23
18HardwareMaintenanceManual 24
StrategyforreplacingFRUs 25
Howtouseerrormessage 26
Productdeﬁnition 26
FRUidentiﬁcation 26
22HardwareMaintenanceManual 28
Chapter3.Generalcheckout 29
Checkoutguide 30
LenovoSolutionCenter 30
Quicktestprograms 30
UEFIdiagnosticprogram 31
Bootablediagnosticprograms 31
Powersystemcheckout 32
Checkingtheacpoweradapter 33
Checkingthecoin-cellbattery 34
8.1only) 36
Refreshingyourcomputer 36
Creatingandusingrecoverymedia 38
Passwords 39
Power-onpassword 39
Harddiskpassword 39
Supervisorpassword 40
Powermanagement 41
Sleepmode 41
Hibernationmode 42
Symptom-to-FRUindex 42
Numericerrorcodes 43
Errormessages 44
Beepsymptoms 44
No-beepsymptoms 45
LCD-relatedsymptoms 45
Intermittentproblems 45
Undeterminedproblems 46
Chapter5.Statusindicators 47
42HardwareMaintenanceManual 48
Chapter6.Functionkeys 49
44HardwareMaintenanceManual 50
Chapter7.Locations 51
Rearview 52
Bottomview 52
LocatingFRUsandCRUs 53
MajorFRUs 54
.Locations49 55
50HardwareMaintenanceManual 56
LookingupFRUinformation 57
52HardwareMaintenanceManual 58
90degreesmore 59
(Cross-section) 59
180degreesmore 60
RetainingtheUUID 61
Generalguidelines 63
Commonservicetools 64
Beforeservicingthecomputer 64
RemovingtheSIMcard 64
1010Batterypack 64
1030Largebottomdoor 66
1050Opticaldrive 67
1060Memorymodule 68
1070Smallbottomdoor 69
1080WirelessLANcard 70
Black0.181Nm 72
1100Coin-cellbattery 73
1110Keyboard 74
.RemovingorreplacingaFRU69 75
70HardwareMaintenanceManual 76
Installationstepsofkeyboard 76
.RemovingorreplacingaFRU71 77
1120Keyboardbezelassembly 79
Removethescrews1 80
Wheninstalling: 80
74HardwareMaintenanceManual 80
Removalstepsofthecolorsensor 82
76HardwareMaintenanceManual 82
.RemovingorreplacingaFRU77 83
RemovalstepsoftheNFCcard 84
78HardwareMaintenanceManual 84
1150LCDunit 88
.RemovingorreplacingaFRU83 89
1160Magnesiumstructureframe 91
1170Speakerassembly 92
1180dc-incableassembly 93
1190Thermalfanassembly 94
2inascendingalphabetical 95
1200USBcard 96
1210Microprocessor 96
1220Systemboardandbasecover 97
.RemovingorreplacingaFRU93 99
2010LCDfrontbezel 100
Important: 101
StepScrew(quantity)Color 102
(1.85kgf-cm) 102
Black0.392Nm 103
(4.0kgf-cm) 103
.RemovingorreplacingaFRU99 105
104HardwareMaintenanceManual 110
AppendixA.Notices 111
Electronicemissionsnotices 112
Trademarks 112
AppendixB.Abbreviationtable 113
108HardwareMaintenanceManual 114
*1PSP40A26003_02* 116

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R 12 Mar 2025 | 05:44:50

Lenovo W541 Informações Técnicas Página 5

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