Lenovo T420i Technical Information

ThinkPadT420andT420iHardwareMaintenanceManual

Notes:1.Useproduct-specicESDprocedureswhentheyexceedtherequirementsnotedhere.2.MakesurethattheESDprotectivedevicesyouusehavebeencertied(ISO9000)asfu

23StepScrew(quantity)ColorTorque2M2×3mm,wafer-head,nylon-coated(1)Black0.181Nm(1.85kgfcm)6494ThinkPadT420andT420iHardwareMaintenanceManual

StepScrew(quantity)ColorTorque6M2.5×6mm,wafer-head,nylon-coated(2)Black0.392Nm(4.0kgfcm)7787Wheninstalling:•Makesurethatyouattachtheconnectorsrmly.•M

91 01 096ThinkPadT420andT420iHardwareMaintenanceManual

1170FanassemblyForaccess,removetheseFRUsinorder:•“1010Batterypack”onpage63•“1020ExpressCardblankbezel”onpage64•“1050DIMMslotcover”onpage69•“1070PCIExp

1a1d1b1cStepScrew(quantity)ColorTorque1Captureshoulderscrew(4)Silver0.181Nm(1.85kgfcm)2M2×3mm,wafer-head,nylon-coated(1)black0.181Nm(1.85kgfcm)ForDisc

ForIntegretedGraphicsmodels:23Wheninstalling:•Beforeyouattachthefanassemblytothecomputer,applythermalgrease,atanamountof0.2grams,onthepartsmarkedaasin

a•Whenattachingthefanassemblytotheframe,takecarenottodamagetheheatsinkaofthefanassembly.•Makesurethatthefanconnectorisattachedrmly.100ThinkPadT420and

1180CPUForaccess,removetheseFRUsinorder:•“1010Batterypack”onpage63•“1020ExpressCardblankbezel”onpage64•“1050DIMMslotcover”onpage69•“1070PCIExpressMini

1190BasecoverassemblyandDC-inconnectorcableForaccess,removetheseFRUsinorder:•“1010Batterypack”onpage63•“1020ExpressCardblankbezel”onpage64•“1030Serial

2222222234StepScrew(quantity)ColorTorque2M2×5mm,wafer-head,nylon-coated(8)Black0.181Nm(1.85kgfcm)Wheninstalling:Makesurethattheconnectorisattachedrml

Safetynotices(multilingualtranslations)Thesafetynoticesinthissectionareprovidedinthefollowinglanguages:•English•Arabic•BrazilianPortuguese•French•Germ

7StepScrew(quantity)ColorTorque7M2×3mm,wafer-head,nylon-coated(1)Black0.181Nm(1.85kgfcm)Note:ApplyinglabelstothebasecoverThenewbasecoverFRUisshippedwi

5WirelessWANMACaddresslabel6ChinamobileIMEIlabel7ChinatelecomIMEIlabel8SIRMlabels(onlyforMalaysia)9Wirelesscardlabel(onlyforBrazil)10Anatellabel(onlyf

1200MagnesiumstructureframeForaccess,removetheseFRUsinorder:•“1010Batterypack”onpage63•“1020ExpressCardblankbezel”onpage64•“1030SerialUltrabayEnhanced

3M2×8mm,wafer-head,nylon-coated(2)Black0.181Nm(1.85kgfcm)4Hexstud,nylon-coated(2)Silver0.392Nm(4.0kgfcm)Chapter8.RemovingandreplacingaFRU107

1210SystemboardandExpressCardslotassemblyForaccess,removetheseFRUsinorder:•“1010Batterypack”onpage63•“1020ExpressCardblankbezel”onpage64•“1030SerialUl

cPlatformControllerHub(PCH)dGraphicProcessingUnit(GPU)(Discretegraphicschip)Note:TheGPUdisonlyformodelswithswitchablegraphics.Modelswithintegratedgrap

StepScrew(quantity)ColorTorque1M2×3mm,wafer-head,nylon-coated(1)Black0.181Nm(1.85kgfcm)2Wheninstalling:Makesurethattheconnectorisattachedrmly.1220mSA

RemovalstepsofmSATAsolidstatedrive1StepScrew(quantity)ColorTorque1M2×3mm,wafer-head,nylon-coated(1)Black0.181Nm(1.85kgfcm)2Chapter8.Removingandreplaci

2010LCDbezelassemblyForaccess,removethefollowingFRU:•“1010Batterypack”onpage63RemovalstepsofLCDbezelassembly1111112112ThinkPadT420andT420iHardwareMain

2020LEDboardForaccess,removetheseFRUsinorder:•“1010Batterypack”onpage63•“2010LCDbezelassembly”onpage112RemovalstepsofLEDboard1StepScrew(quantity)Color

DANGERIftheLCDbreaksandtheuidfrominsidetheLCDgetsintoyoureyesoronyourhands,immediatelywashtheaffectedareaswithwaterforatleast15minutes.Seekmedicalcar

Wheninstalling:Makesurethattheconnectorisattachedrmly.114ThinkPadT420andT420iHardwareMaintenanceManual

2030IntegratedcameraForaccess,removetheseFRUsinorder:•“1010Batterypack”onpage63•“2010LCDbezelassembly”onpage112Removalstepsofintegratedcamera1StepScre

2116ThinkPadT420andT420iHardwareMaintenanceManual

2040LCDpanelandLCDcableForaccess,removetheseFRUsinorder:•“1010Batterypack”onpage63•“1020ExpressCardblankbezel”onpage64•“1050DIMMslotcover”onpage69•“10

76Wheninstalling:Makesurethattheconnectorisattachedrmly.118ThinkPadT420andT420iHardwareMaintenanceManual

2050CameracableForaccess,removetheseFRUsinorder:•“1010Batterypack”onpage63•“1020ExpressCardblankbezel”onpage64•“1050DIMMslotcover”onpage69•“1070PCIExp

2060WirelessLANantennaassemblyorwirelessLAN/WANantennaassemblyForaccess,removetheseFRUsinorder:•“1010Batterypack”onpage63•“1020ExpressCardblankbezel”o

4334StepScrew(quantity)ColorTorque3M2×3mm,at-head,nylon-coated(2)Black0.181Nm(1.85kgfcm)55Chapter8.RemovingandreplacingaFRU121

2070HingesandLCDrearcoverassemblyForaccess,removetheseFRUsinorder:•“1010Batterypack”onpage63•“1020ExpressCardblankbezel”onpage64•“1050DIMMslotcover”on

Chapter8.RemovingandreplacingaFRU123

PERIGOChapter1.Safetyinformation7

124ThinkPadT420andT420iHardwareMaintenanceManual

Chapter9.LocationsThischapterpresentsthelocationsofThinkPadT420andT420ihardwarecomponents.Frontview1Integratedcamera(forsomemodels)2ThinkLight3Built-i

13232 0458651 21 01191 41 61 31 71 51 81 92 17126ThinkPadT420andT420iHardwareMaintenanceManual

Rearview1StatusindicatorsNote:Forthedescriptionofeachindicator,seeChapter5“Statusindicators”onpage49.2SmartCardslot3DisplayPortconnector4USBconnector5

Bottomview1Batterypack2Batterypacklatch3DIMMslot4Dockingconnector5LCDcoverlatch6SerialUltrabayEnhancedlocklatch7SerialUltrabayEnhancedejectlatch675123

Chapter10.PartslistThischaptercontainsfollowinglistsoftheserviceparts.•“Overall”onpage130•“LCDFRUs”onpage150•“Keyboard”onpage154•“Miscellaneousparts”o

Overall1234567891011121314153191820212223242526272829301716cab130ThinkPadT420andT420iHardwareMaintenanceManual

Table9.Partslist—OverallNo.FRU(Overall)FRUno.CRUIDa-cSee“Miscellaneousparts”onpage156.1LCDunit(see“LCDFRUs”onpage150.)2ThinkPadb/g/nWireless(1x1BGN)•4

Table9.Partslist—Overall(continued)No.FRU(Overall)FRUno.CRUID2IntelCentrinoUltimate-N6300•4177-CTO,2Hx,2Jx,Q8x,QFx•4178-CTO,67x,99x,9Ax,9Bx,9Cx,CBx•41

Table9.Partslist—Overall(continued)No.FRU(Overall)FRUno.CRUID34-GBDDR3-1333SDRAMSO-DIMM(PC3-10600)card•4177-CTO,27x,29x,2Ax,2Bx,2Cx,2Hx,2Jx,2Kx,2Lx,2M

AntesdeligarocomputadorapósasubstituiçãodaFRU,certique-sedequetodososparafusos,molaseoutraspeçaspequenasestejamnolugarenãoestejamsoltosdentrodocomput

Table9.Partslist—Overall(continued)No.FRU(Overall)FRUno.CRUIDN9x,NAx,NBx,NFx,PAx,PBx,PCx,PFx,PGx,PHx,PKx,PLx,PMx,PNx,PPx,PQx,PRx,PSx,PTx,PUx,PVx,PWx,P

Table9.Partslist—Overall(continued)No.FRU(Overall)FRUno.CRUID8DVD-RAM/RWdrive•4177-CTO,22x,23x,24x,25x,26x,27x,28x,29x,2Ax,2Bx,2Cx,2Dx,2Ex,2Fx,2Gx,2Hx

Table9.Partslist—Overall(continued)No.FRU(Overall)FRUno.CRUID8TravelBezel•4177-CTO,Q7x,QDx,QFx•4178-CTO•4179-CTO•4180-CTO,LPx,LQx•4236-CTO,NDx,NEx•423

Table9.Partslist—Overall(continued)No.FRU(Overall)FRUno.CRUID12I/Osubcard(1394andUSB)•4177-CTO,2Fx,2Gx,2Hx,2Kx,2Lx,2Mx,2Nx,2Px,2Qx,2Rx,2Sx,2Tx,2Ux,2Vx

Table9.Partslist—Overall(continued)No.FRU(Overall)FRUno.CRUIDL7x,L8x,L9x,LAx,LBx,LCx,LDx,LEx,LFx,LGx,LHx,LJx,LKx,LLx,LMx,LNx,LPx,LQx,LRx,LSx,LTx,LUx,L

Table9.Partslist—Overall(continued)No.FRU(Overall)FRUno.CRUID15Slicebattery•4177-CTO•4178-CTO•4179-CTO•4180-CTO•4236-CTO•4237-CTO•4238-CTO42T4739*16DI

Table9.Partslist—Overall(continued)No.FRU(Overall)FRUno.CRUID17IntegratedChinaTelecomMobileBroadband(HuaweiEM660)•4177-CTO•4178-CTO•4179-CTO•4180-CTO•

Table9.Partslist—Overall(continued)No.FRU(Overall)FRUno.CRUID19SATAharddiskdrive,160GB,7200rpm•4177-CTO•4178-CTO•4179-CTO•4180-CTO•4236-CTO•4237-CTO•4

Table9.Partslist—Overall(continued)No.FRU(Overall)FRUno.CRUID19Solidstatedrive,128GB•4177-CTO,Q7x•4178-CTO,5Rx,ATx,B7x,CUx•4179-CTO•4180-CTO,KAx,L3x,L

Table9.Partslist—Overall(continued)No.FRU(Overall)FRUno.CRUID21Systemboardassembly,integratedgraphics,non-AMT,TPM•4177-CTO,25x,26x,27x,28x,29x,2Dx,2Ex

Emboraasprincipaisbateriaspossuambaixavoltagem,umabateriaemcurto-circuitoouaterradapodeproduzircorrenteobastanteparaqueimarmateriaisdepessoalouinamáv

Table9.Partslist—Overall(continued)No.FRU(Overall)FRUno.CRUID21Systemboardassembly,discretegraphics,non-AMT,TPM•4177-CTO,22x,23x,24x,2Ax,2Bx,2Cx,2Kx,2

Table9.Partslist—Overall(continued)No.FRU(Overall)FRUno.CRUID22CPUassembly,i7-2620M(2.70GHz)•4177-CTO,2Hx,2Jx,Q7x,QAx,QBx,QFx•4178-CTO,5Xx,5Yx,67x,6Ax

Table9.Partslist—Overall(continued)No.FRU(Overall)FRUno.CRUID22CPUassembly,IntelPentiumB950(2.10GHz)•4177-CTO,GFx,GKx,GLx,GMx•4178-CTO•4179-CTO•4180-C

Table9.Partslist—Overall(continued)No.FRU(Overall)FRUno.CRUID26Fanassembly,integrated•4177-CTO,25x,26x,27x,28x,29x,2Dx,2Ex,2Fx,2Gx,2Hx,2Qx,2Rx,2Sx,35x

Table9.Partslist—Overall(continued)No.FRU(Overall)FRUno.CRUID27FPCcable(touchpadwithngerprintreaderandBluetooth)•4177-CTO,22x,23x,24x,27x,29x,2Ax,2Bx

Table9.Partslist—Overall(continued)No.FRU(Overall)FRUno.CRUID•4236-CTO,MBx,N2x,N3x,N4x,N5x,N6x,N7x,N8x,N9x,NAx,NBx,NCx,NDx,NEx,NFx,NGx,NHx,NKx,NLx,NMx

LCDFRUs12345678910Table10.Partslist—LCDFRUsNo.FRUFRUno.CRUIDa,bSee“Miscellaneousparts”onpage156.1LCDbezelassembly04W1609N150ThinkPadT420andT420iHardwa

Table10.Partslist—LCDFRUs(continued)No.FRUFRUno.CRUID2Cameramodule•4177-CTO,22x,23x,24x,25x,26x,27x,28x,29x,2Ax,2Bx,2Cx,2Dx,2Ex,2Fx,2Gx,2Hx,2Jx,2Kx,2L

Table10.Partslist—LCDFRUs(continued)No.FRUFRUno.CRUID3LCDmodule,14.0-inchHD(1366x768)LEDbacklightAnti-GlareDisplay•4177-CTO,25x,26x,27x,28x,2Dx,2Jx,2M

Table10.Partslist—LCDFRUs(continued)No.FRUFRUno.CRUID8LCDcable(for14.0-inchHDLCDmodule)•4177-CTO,25x,26x,27x,28x,2Dx,2Jx,2Mx,2Rx,2Sx,2Tx,2Ux,2Vx,2Wx,3

DANGERSilepanneaud'afchageàcristauxliquidessebriseetquevousrecevezdanslesyeuxousurlesmainsunepartieduuide,rincez-lesabondammentpendantaumoinsqu

KeyboardTable11.Partslist—KeyboardLanguageFRUno.CRUIDArabic45N207645N214645N2216Belgian45N207745N214745N2217BrazilianPortuguese45N207545N214545N2215Bu

Table11.Partslist—Keyboard(continued)LanguageFRUno.CRUIDNetherlands45N209045N216045N2230Turkish(FType)60Y955260Y955460Y9550Chapter10.Partslist155

MiscellaneouspartsTable12.Partslist—MiscellaneouspartsFRUFRUno.CRUIDScrewandsealkit:•M2×3mm,black(50)•M2×5mm,black(20)•M2×8mm,black(15)•M2×10mm,Silver

Table12.Partslist—Miscellaneousparts(continued)FRUFRUno.CRUID•Insulationsheet-ngerprint•LCDlatchleft•LCDlatchright•LCDlink•LCDlatchspringSystemmiscel

InformationaboutacpoweradaptersTable13.Partslist—2-pinacpoweradaptersFRUFRUno.CRUID2-pin(65W,20V)adapter(modelsCTO,xxE,xxF,xxJ,xxL,xxP ,xxS,xxU,xxY)42

PowercordsAThinkPadpowercordforaspeciccountryorregionisusuallyavailableonlyinthatcountryorregion:Table15.Partslist—2-pinpowercordsCountryorregionFRUn

RecoverydiscsWindowsXPProfessionalDVDsNote:TheWindowsXPProfessionalrecoveryDVDsareavailableonlyformodelswithavalidMicrosoftWindowsXPProfessionalcerti

WindowsVistaHomeBasic(32bit)SP2DVDsNote:TheWindowsVistarecoveryDVDsareavailableonlyformodelswithavalidMicrosoftWindowsVistacerticateofauthenticity(CO

QXx,QYx,R2x,R3x,R4x,R8x,R9x,RAx,RBx,RCx,RDx,RFx,RGx,RJx,RKx,RLx,RMx,RNx,RPx,RQx,RRx,RTx,RVx,RWx,RXx,RYx•4178-CTO,52x,53x,54x,55x,56x,57x,58x,59x,5Ax,5

Table21.Partslist—Windows7Professional(64bit)recoveryDVDs(continued)LanguageP/NCRUIDSerbian-LatinwithEnglish04T1342SimpliedChinese04T1324TraditionalC

VORSICHTAkkusenthaltengeringeMengenvonNickel.Siedürfennichtzerlegt,wiederaufgeladen,kurzgeschlossen,oderFeueroderWasserausgesetztwerden.BeiderEntsorgu

Table23.Partslist—Windows7HomePremium(32bit)recoveryDVDsLanguageP/NCRUIDEnglish(forIndia)04T1362SimpliedChinese04T1361USEnglish04T1363*Windows7HomePr

Table24.Partslist—Windows7HomePremium(64bit)recoveryDVDs(continued)LanguageP/NCRUIDTurkishwithEnglish04T1384USEnglish(Disabled)04T1385USEnglish04T1386

CommonservicetoolsTable27.Partslist—CommonservicetoolsToolP/NScrewdriverkit95F35981/4"drivespinnerhandle16508401/4"Sq.to1/4"hextorxadap

AppendixA.NoticesLenovomaynotoffertheproducts,services,orfeaturesdiscussedinthisdocumentinallcountries.ConsultyourlocalLenovorepresentativeforinformat

ElectronicemissionsnoticesForelectronicemissioninformationonClassBdigitaldevices,refertothecorrespondinginformationintheUserGuide.168ThinkPadT420andT4

TrademarksThefollowingtermsaretrademarksofLenovointheUnitedStates,othercountriesorboth:ActiveProtectionSystemLenovoThinkLightThinkPadThinkVantageTrack

170ThinkPadT420andT420iHardwareMaintenanceManual

PartNumber:0A60007_03(1P)P/N:0A60007_03*0A60007_03*

WenneinAustauschderFRUbeilaufendemBetriebnichterlaubtist,gehenSiebeimAustauschderFRUwiefolgtvor:SchaltenSiedenComputeraus,ziehenSiealleNetzkabelvonden

Chapter1.Safetyinformation13

Note:Beforeusingthisinformationandtheproductitsupports,besuretoreadthegeneralinformationunderAppendixA“Notices”onpage167.FourthEdition(November2011)©C

14ThinkPadT420andT420iHardwareMaintenanceManual

AntesdeencenderelsistemadespuesdesustituirunaFRU,compruebequetodoslostornillos,muellesydemáspiezaspequeñasseencuentranensusitioynoseencuentransueltasd

Paraevitardescargas,noquitelacubiertadeplásticoquerodealapartebajadelatarjetainvertida.Aunquelasbateríasprincipalestienenunvoltajebajo,unabateríacorto

Lasercompliancestatement(multilingualtranslations)Thelasercompliancestatementsinthissectionareprovidedinthefollowinglanguages:•English•Arabic•Brazilia

18ThinkPadT420andT420iHardwareMaintenanceManual

Chapter1.Safetyinformation19

20ThinkPadT420andT420iHardwareMaintenanceManual

Chapter1.Safetyinformation21

22ThinkPadT420andT420iHardwareMaintenanceManual

Chapter2.ImportantserviceinformationThischapterpresentsfollowingimportantserviceinformationthatappliestoallmachinetypessupportedbythismanual:•“Strateg

ContentsAboutthismanual...iiiChapter1.Safetyinformation...1Generalsafety...1Electricalsafety...2Safetyinspectiongu

Attention:Thedrivestartupsequenceinthecomputeryouareservicingmayhavebeenchanged.Beextremelycarefulduringwriteoperationssuchascopying,saving,orformatti

StrategyforreplacingFRUsforCTO,CMV,andGAVProductdenitionDynamicCongureToOrder(CTO)ThisprovidestheabilityforacustomertocongureaLenovosolutionfromane

•eSupportcanbeusedtoviewthelistofkeycommoditiesbuiltinaparticularmachineserial(thisisthesamerecordfoundinPEW).•eSupportcanbeaccessedatthefollowingWebs

Chapter3.GeneralcheckoutThischapterpresentsfollowinginformation:•“Whattodorst”onpage28•“Checkoutguide”onpage29–“DiagnosticsusingPC-DoctorforDOS”onpag

WhattodorstWhenyoudoreturnaFRU,youmustincludethefollowinginformationinthepartsexchangeformorpartsreturnformthatyouattachtoit:1.Nameandphonenumberofse

CheckoutguideUsethefollowingproceduresasaguideinidentifyingandcorrectingproblemswiththeThinkPadNotebook.Note:ThediagnostictestsareintendedtotestonlyTh

3.Turnonthecomputer.Ifthecomputercannotbepoweredon,goto“Powersystemcheckout”onpage34,andcheckthepowersources.Ifanerrorcodeappears,goto“Symptom-to-FRUi

11.Followtheinstructionsonthescreen.Ifthereisaproblem,PC-Doctorshowsmessagesdescribingit.12.Toexitthetest,selectQuit—ExitDiag.Tocancelthetest,pressEsc

Foradditionalinformationaboutthisprogram,seetheHelpfortheprogram.32ThinkPadT420andT420iHardwareMaintenanceManual

FRUtestsThefollowingtableshowsthetestforeachFRU.Table1.FRUtestsFRUApplicabletestSystemboard1.Diagnostics➙CPU/Coprocessor2.Diagnostics➙Systemboard3.Ift

1160LCDunit...931170Fanassembly...971180CPU...1011190BasecoverassemblyandDC-inconnectorcable...10212

PowersystemcheckoutToverifyasymptom,dothefollowing:1.Turnoffthecomputer.2.Removethebatterypack.3.Connecttheacpoweradapter.4.Checkthatpowerissuppliedwh

Performoperationalcharging.Ifthebatterystatusindicatororicondoesnotturnon,removethebatterypackandletitreturntoroomtemperature.Reinstallthebatterypack.

WireVoltage(Vdc)Red+2.5to+3.2BlackGround•Ifthevoltageiscorrect,replacethesystemboard.•Ifthevoltageisnotcorrect,replacethebackupbattery.•Ifthebackupbat

Chapter4.RelatedserviceinformationThischapterpresentsfollowinginformation:•“RestoringthefactorycontentsbyusingRecoveryDiscSet”onpage37•“Passwords”onpa

2.InserttheOperatingSystemRecoveryDiscintotheDVDdrive.3.PressF10tosavetheThinkPadSetupprogramcongurationchanges.Followtheinstructionsonthescreentobeg

Attention:IftheuserHDPhasbeenforgotten,checkwhetheramasterHDPhasbeenset.Ifithas,itcanbeusedforaccesstotheharddiskdrive.IfnomasterHDPisavailable,neithe

2.WhentheThinkPadlogocomesup,immediatelypressF1toentertheThinkPadSetupprogram.WhenthePOPiconisappearingonthescreen,enterthePOP .3.SelectSecurity,using

PowermanagementToreducepowerconsumption,thecomputerhasthreepowermanagementmodes:screenblank,sleep(standbyinWindowsXP),andhibernation.ScreenblankmodeIf

•Thesystemispoweredoff.Note:Ifthecomputerentersthehibernationmodewhileitisdockedtothedockingstation,donotundockitbeforeresumingnormaloperation.Ifyoudo

Symptom-to-FRUindexThissectioncontainsfollowinginformation:•“Numericerrorcodes”onpage43•“Errormessages”onpage45•“Beepsymptoms”onpage46•“No-beepsymptom

AboutthismanualThismanualcontainsserviceandreferenceinformationforthefollowingThinkPad®products.ThinkPadT420andT420iMachineType4177,4178,4179,4180,423

Table2.Numericerrorcodes(continued)SymptomorerrorFRUoraction,insequence0191SystemSecurity—InvalidRemoteChangerequested.1.RuntheThinkPadSetupprogram,an

ErrormessagesTable3.ErrormessagesSymptomorerrorFRUoraction,insequenceFanerror.1.Fan.2.Thermalgrease.3.Systemboard.Thermalsensingerror.Systemboard.This

BeepsymptomsTable4.BeepsymptomsSymptomorerrorFRUoraction,insequenceOnebeepandablank,unreadable,orashingLCD.1.ReseattheLCDconnector.2.LCDassembly.3.Ex

•LenovowillnotprovidereplacementiftheLCDiswithinspecicationaswecannotguaranteethatanyreplacementLCDwillhavezeropixeldefects.•OnepixelconsistsofR,G,Bs

IntermittentproblemsIntermittentsystemhangproblemscanbeduetoavarietyofcausesthathavenothingtodowithahardwaredefect,suchascosmicradiation,electrostatic

Chapter5.StatusindicatorsThischapterpresentsthesystemstatusindicatorsthatshowthestatusofthecomputer.71268934 5©CopyrightLenovo201149

56111 0Table7.StatusindicatorsIndicatorMeaning1SpeakermuteOrange:Thespeakerisonmute.Tosetthespeakersonmuteorunmute,pressthespeakermutebutton.2Micropho

Table7.Statusindicators(continued)IndicatorMeaning6PoweronGreen:Thecomputerisonandreadytouse.Thisindicatorstayslitaroundthepower-onbuttonwhenevertheco

Table7.Statusindicators(continued)IndicatorMeaningTheacpoweradapterisattachedtothecomputer.Thebatterystatusindicatorisoff:Thebatterypackofthecomputeri

Chapter6.FnkeycombinationsThefollowingtableshowsthefunctionofeachcombinationofFnwithafunctionkey.Table8.FnkeycombinationsKeycombinationDescriptionFn+F

ivThinkPadT420andT420iHardwareMaintenanceManual

Table8.Fnkeycombinations(continued)KeycombinationDescriptionNote:Toswitchbetweenthecomputerdisplayandanexternalmonitor,theWin+Pkeycombinationisalsoava

Table8.Fnkeycombinations(continued)KeycombinationDescriptionFn+PrtScHavethesamefunctionastheSysRqkey.Fn+ScrLkEnableordisablethenumerickeypad.Theindica

56ThinkPadT420andT420iHardwareMaintenanceManual

Chapter7.FRUreplacementnoticesThischapterpresentsnoticesrelatedtoremovingandreplacingparts.ReadthischaptercarefullybeforereplacinganyFRU.ExternalCRUst

•TorquedriverIfyouhaveatorquedriver,refertothe“Torque”columnforeachstep.•Makesurethatyouusethecorrectscrew.Ifyouhaveatorquescrewdriver,tightenallscrew

MTMonrearlabel:TTTT-CTOS/NSSSSSSSProductIDonrearlabel:TTTT-MMM(UsethisnumberwhensettingSerialNumber)Intheexample,theSerialNumbertobeinputis“1STTTTMMMS

60ThinkPadT420andT420iHardwareMaintenanceManual

Chapter8.RemovingandreplacingaFRUThischapterpresentsdirectionsanddrawingsforuseinremovingandreplacingaFRU.ExternalCRUstatementtocustomers:Someproblems

BeforeservicingThinkPadT420andT420iSomemodelsoftheThinkPadT420andT420iyouareservicingmighthavetheSIMcardthatthecustomerhasinstalled.Ifthecomputeryouar

1010BatterypackImportantnoticeforreplacingabatterypack:LenovoThinkVantageT oolbox(inWindows7)hasanautomaticbatterydiagnosticthatdeterminesifthebattery

Chapter1.SafetyinformationThischapterpresentsfollowingsafetyinformationthatyouneedtobefamiliarwithbeforeyouserviceaThinkPadNotebook.•“Generalsafety”on

1020ExpressCardblankbezelRemovalstepsofExpressCardblankbezelWhenyoupresstheExpressCardblankbezel1,itpopsout2.12Wheninstalling:Makesurethatthebezelisco

1030SerialUltrabayEnhanceddeviceortravelbezelForaccess,removethisFRU:•“1010Batterypack”onpage63RemovalstepsofSerialUltrabayEnhanceddeviceortravelbezel

1040Harddiskdrive(HDD)andsolidstatedrive(SSD)Foraccess,removethisFRU:•“1010Batterypack”onpage63Attention:•Donotdropthedriveorapplyanyphysicalshocktoit

43ForHDDandHDDrubberrails(9.5mm):44ForHDDandHDDrubberrails(7.0mm):44ForSSDandspacers:44Chapter8.RemovingandreplacingaFRU67

Wheninstalling:MakesurethatSSDspacersorHDDrubberrailsareattachedrmly.68ThinkPadT420andT420iHardwareMaintenanceManual

1050DIMMslotcoverForaccess,removethisFRU:•“1010Batterypack”onpage63RemovalstepsofDIMMslotcoverNote:Loosenthescrew1,butdonotremoveit.2Chapter8.Removing

1060DIMM(intheslotontheundersideofthecomputer)Foraccess,removetheseFRUsinorder:•“1010Batterypack”onpage63•“1050DIMMslotcover”onpage69Note:Yourcomputer

1070PCIExpressMiniCardforwirelessWANForaccess,removetheseFRUsinorder:•“1010Batterypack”onpage63•“1050DIMMslotcover”onpage69RemovalstepsofPCIExpressMin

3Note:PlugtheyellowcableintothejacklabeledMAIN,andthebluecableintothejacklabeledAUXonthecard.IfthecomputeryouareservicingisawirelessWAN-readymodelandd

1080KeyboardForaccess,removetheseFRUsinorder:•“1010Batterypack”onpage63•“1050DIMMslotcover”onpage69Removalstepsofkeyboard1StepScrew(quantity)ColorTorq

ElectricalsafetyObservethefollowingruleswhenworkingonelectricalequipment.Important:Useonlyapprovedtoolsandtestequipment.Somehandtoolshavehandlescovere

Liftthekeyboardalittleinthedirectionshownbyarrow3,andthendetachtheconnector4.InstallationstepsofkeyboardWheninstallingthekeyboard,dothefollowing:1.Att

2.Attachthekeyboardsothatthekeyboardedgesaareundertheframe.3.Tomakesurethatthefrontedgeofthekeyboardishousedrmly,gentlypressthekeyswithyourpalmsandsl

4.Makesurethatthefrontedgeofthekeyboardbisattachedrmly.bbb5.Securethekeyboardbytighteningthescrewsfromthebottomsideofthecomputer.76ThinkPadT420andT42

1090DIMM(intheslotunderthekeyboard)Foraccess,removetheseFRUsinorder:•“1010Batterypack”onpage63•“1050DIMMslotcover”onpage69•“1080Keyboard”onpage73Note:

1232Wheninstalling:InsertthenotchedendoftheDIMMintothesocket.PresstheDIMMrmly,andpivotituntilitsnapsintoplace.Makesurethatitisrmlyxedintheslotanddo

1100BackupbatteryForaccess,removetheseFRUsinorder:•“1010Batterypack”onpage63•“1050DIMMslotcover”onpage69•“1080Keyboard”onpage73Removalstepsofbackupbat

80ThinkPadT420andT420iHardwareMaintenanceManual

1110PCIExpressMiniCardforwirelessLANForaccess,removetheseFRUsinorder:•“1010Batterypack”onpage63•“1050DIMMslotcover”onpage69•“1080Keyboard”onpage73Remo

3Wheninstalling:•InmodelswithawirelessLANcardthathastwoantennaconnectors,plugthegraycableintothejackmarkedMAINorM,andtheblackcableintothejackmarkedAUX

1120Keyboardbezelassembly,FPCcable,andBluethoothdaughtercardForaccess,removetheseFRUsinorder:•“1010Batterypack”onpage63•“1020ExpressCardblankbezel”onp

–Usecaution;donotbecomeavictimyourself.–Switchoffpower.–Sendanotherpersontogetmedicalaid.SafetyinspectionguideThepurposeofthisinspectionguideistoassis

StepScrew(quantity)ColorTorque3M2×3mm,wafer-head,nylon-coated(1)Black0.181Nm(1.85kgfcm)4Shoulderscrew(2)Silver0.181Nm(1.85kgfcm)84ThinkPadT420andT420i

76Wheninstalling:Makesurethattheconnectorisattachedrmly.Chapter8.RemovingandreplacingaFRU85

1 71 7Wheninstalling:Makesurethattheconnectorsareattachedrmly.1 81 9StepScrew(quantity)ColorTorque13M2×3mm,wafer-head,nylon-coated(1)Black0.181Nm(1.8

2 0Wheninstalling:Makesurethattheconnectorisattachedrmly.Chapter8.RemovingandreplacingaFRU87

1130SmartCardForaccess,removetheseFRUsinorder:•“1010Batterypack”onpage63•“1050DIMMslotcover”onpage69•“1080Keyboard”onpage73•“1120Keyboardbezelassembly

Wheninstalling:Makesurethattheconnectorisattachedrmly.RemovalstepsofSmartCarddummyspacerSomemodelshaveaSmartCarddummyspacerasamiscellaneouspart.Forth

1140Modemdaughtercard(MDC)Foraccess,removetheseFRUsinorder:•“1010Batterypack”onpage63•“1050DIMMslotcover”onpage69•“1080Keyboard”onpage73•“1120Keyboard

1150SpeakerassemblyForaccess,removetheseFRUsinorder:•“1010Batterypack”onpage63•“1050DIMMslotcover”onpage69•“1080Keyboard”onpage73•“1120Keyboardbezelas

332Wheninstalling:Attachthespeakerassemblyandroutethecableasshowninthefollowinggure,andmakesurethatthespeakerconnectorisattachedrmly.92ThinkPadT420a

1160LCDunitForaccess,removetheseFRUsinorder:•“1010Batterypack”onpage63•“1020ExpressCardblankbezel”onpage64•“1050DIMMslotcover”onpage69•“1070PCIExpress