Lenovo ThinkPad T420s, ThinkPad T420si Hardware Maintenance Manual [en, ar, bg, bs, cs, da, de, el, es, fi, fr, he, hr, hu, id, it, ko, nl, pl, pt, pt, ro, ru, sk, sl, sr, sv, tr, uk, zc, zh]

HardwareMaintenanceManual

ThinkPadT420sandT420si

Note

Beforeusingthisinformationandtheproductitsupports,besuretoreadthegeneralinformationunder AppendixA“Notices”onpage143.

EighthEdition(November2013)

©CopyrightLenovo2011,2013. LIMITEDANDRESTRICTEDRIGHTSNOTICE:IfdataorsoftwareisdeliveredpursuantaGeneralServices Administration“GSA”contract,use,reproduction,ordisclosureissubjecttorestrictionssetforthinContract No.GS-35F-05925.

Contents

Aboutthismanual...........iii

Chapter1.Safetyinformation......1

Generalsafety................1

Electricalsafety...............2

Safetyinspectionguide............3

Handlingdevicesthataresensitivetoelectrostatic

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

Groundingrequirements............4

Safetynotices(multilingualtranslations)......4

Lasercompliancestatement(multilingual

translations)................24

Chapter2.Importantservice

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

StrategyforreplacingFRUs.........31

Strategyforreplacingaharddiskdrive...32 Importantnoticeforreplacingasystem

board................32

Howtouseerrormessage........32

StrategyforreplacingFRUsforCTO,CMV ,and

GAV...................32

Productdeﬁnition............32

FRUidentiﬁcationforCTO,CMV ,andGAV

products...............33

Chapter3.Generalcheckout.....35

Whattodoﬁrst..............35

Checkoutguide..............36

SystemsupportingtheLenovoThinkVantage ToolboxprogramandthePC-DoctorforDOS

diagnosticsprogram..........36

SystemsupportingtheLenovodiagnostics

programs...............40

Powersystemcheckout...........42

Checkingtheacpoweradapter......43

Checkingoperationalcharging......44

Checkingthebatterypack........44

Checkingthebackupbattery.......44

Chapter4.Relatedservice

information..............47

RestoringthefactorycontentsbyusingProduct

Recoverydiscs..............47

RestoringthefactorycontentsbyusingRecovery

DiscSet.................47

Passwords................49

Power-onpassword...........49

Harddiskpassword...........49

Supervisorpassword..........49

Howtoremovethepower-onpassword...49 Howtoremovetheharddiskpassword...50

Powermanagement............50

Screenblankmode...........50

Sleep(standby)mode..........51

Hibernationmode...........51

Symptom-to-FRUindex...........52

Numericerrorcodes..........53

Errormessages............54

Beepsymptoms............54

No-beepsymptoms...........55

LCD-relatedsymptoms.........55

Intermittentproblems..........56

Undeterminedproblems.........56

Chapter5.Statusindicators.....57

Chapter6.Fnkeycombinations...61

Chapter7.FRUreplacement

notices................63

Screwnotices...............63

Retainingserialnumbers...........64

Restoringtheserialnumberofthesystem

unit.................64

RetainingtheUUID...........65

ReadingorwritingtheECAinformation...65

Chapter8.Removingandreplacinga

FRU..................67

BeforeservicingThinkPadT420sandT420si

models..................67

1010Batterypack.............68

1020SerialUltrabaySlimdeviceortravelbezel..69 1030Solid-statedrive(SSD)orharddiskdrive

(HDD)..................70

1040DIMM................72

1050PCIExpressMiniCardforwirelessLAN..74 1060PCIExpressMiniCardforwirelessWAN..77

10704–in–1mediacardreader........79

1080Keyboard..............80

1090Backupbattery............83

1100Palmrestwithﬁngerprintreader,smartcard

reader,andspeaker.............84

1110LCDunit...............88

1120DC-insubcard............90

1130Bluetoothdaughtercard(BDC-3.0)....91

©CopyrightLenovo2011,2013

1140Bluetooth-wirelessradioswitchFPC....91

1150Systemboard,fanassembly,34-mm

ExpressCardreader,andbasecover......93

1160mSATA...............99

2010LCDbezelassembly..........101

2020LCDpanel..............102

2030Integratedcamera,microphone,orhall

sensorcard................104

2040LEDsubcard.............106

2050LCDcable..............107

2060Hingekit...............108

2070LEDcable..............110

2080AntennakitandLCDrearcoverassembly..111

Chapter9.Locations........115

Frontview................115

Rearview.................116

Bottomview...............116

Chapter10.Partslist........117

Overall..................118

LCDFRUs................128

Keyboard.................132

Miscellaneousparts............133

acpoweradapter.............134

Powercords...............134

Recoverydiscs..............135

WindowsXPProfessional(32bit)DVDs...135 WindowsVistaHomeBasic(32bit)DVDs..136 WindowsVistaBusiness(32bit)DVDs...136

Windows7HomeBasic(32bit)DVDs....137

Windows7HomeBasic(64bit)DVDs....137

Windows7Ultimate(32bit)DVDs.....138

Windows7Ultimate(64bit)DVDs.....138

Windows7HomePremium(32bit)DVDs..138 Windows7HomePremium(64bit)DVDs..139

Windows7Professional(32bit)DVDs....139

Windows7Professional(64bit)DVDs....140

Windows7Professional(32bit)RapidBoot

DVDs................141

Commonservicetools...........142

AppendixA.Notices.........143

Electronicemissionsnotices.........144

Trademarks................144

iiHardwareMaintenanceManual

Aboutthismanual

ThismanualcontainsserviceandreferenceinformationforthefollowingThinkPad

ThinkPadT420sandT420si

Usethismanualalongwiththeadvanceddiagnosticteststotroubleshootproblems.

Important:ThismanualisintendedonlyfortrainedservicetechnicianswhoarefamiliarwithThinkPad products.Usethismanualalongwiththeadvanceddiagnosticteststotroubleshootproblems effectively.BeforeservicingaThinkPadproduct,besuretoreadalltheinformationunderChapter1“Safety information”onpage1

andChapter2“Importantserviceinformation”onpage31.

Machinetypes(MT)4170,4171,4172,4173,4174,4175,and4176

products.

©CopyrightLenovo2011,2013

iii

ivHardwareMaintenanceManual

Chapter1.Safetyinformation

Thischapterpresentsfollowingsafetyinformationthatyouneedtobefamiliarwithbeforeyouservice aThinkPadNotebook.

•“Generalsafety”onpage1

•“Electricalsafety”onpage2

•“Safetyinspectionguide”onpage3

•“Handlingdevicesthataresensitivetoelectrostaticdischarge”onpage3

•“Groundingrequirements”onpage4

•“Safetynotices(multilingualtranslations)”onpage4

•“Lasercompliancestatement(multilingualtranslations)”onpage24

Generalsafety

Followtheserulestoensuregeneralsafety:

•Observegoodhousekeepingintheareaofthemachinesduringandaftermaintenance.

•Whenliftinganyheavyobject:

1.Makesurethatyoucanstandsafelywithoutslipping.

2.Distributetheweightoftheobjectequallybetweenyourfeet.

3.Useaslowliftingforce.Nevermovesuddenlyortwistwhenyouattempttolift.

4.Liftbystandingorbypushingupwithyourlegmuscles;thisactionremovesthestrainfromthe musclesinyourback.Donotattempttoliftanyobjectthatweighsmorethan16kg(35lb)orthat

youthinkistooheavyforyou.

•Donotperformanyactionthatcauseshazardstothecustomer,orthatmakestheequipmentunsafe.

•Beforeyoustartthemachine,makesurethatotherservicetechniciansandthecustomer'spersonnelare notinahazardousposition.

•Placeremovedcoversandotherpartsinasafeplace,awayfromallpersonnel,whileyouareservicing themachine.

•Keepyourtoolcaseawayfromwalkareassothatotherpeoplewillnottripoverit.

•Donotwearlooseclothingthatcanbetrappedinthemovingpartsofamachine.Makesurethatyour sleevesarefastenedorrolledupaboveyourelbows.Ifyourhairislong,fastenit.

•Inserttheendsofyournecktieorscarfinsideclothingorfastenitwithanonconductiveclip,about8 centimeters(3inches)fromtheend.

•Donotwearjewelry,chains,metal-frameeyeglasses,ormetalfastenersforyourclothing.

Attention:Metalobjectsaregoodelectricalconductors.

•Wearsafetyglasseswhenyouarehammering,drilling,soldering,cuttingwire,attachingsprings,using solvents,orworkinginanyotherconditionsthatmightbehazardoustoyoureyes.

•Afterservice,reinstallallsafetyshields,guards,labels,andgroundwires.Replaceanysafetydevice thatiswornordefective.

•Reinstallallcoverscorrectlybeforereturningthemachinetothecustomer.

•Fanlouversonthemachinehelptopreventoverheatingofinternalcomponents.Donotobstructfan louversorcoverthemwithlabelsorstickers.

©CopyrightLenovo2011,2013

Electricalsafety

Observethefollowingruleswhenworkingonelectricalequipment.

Important:Useonlyapprovedtoolsandtestequipment.Somehandtoolshavehandlescoveredwithasoft materialthatdoesnotinsulateyouwhenworkingwithliveelectricalcurrents.Manycustomershave,near theirequipment,rubberﬂoormatsthatcontainsmallconductiveﬁberstodecreaseelectrostaticdischarges. Donotusethistypeofmattoprotectyourselffromelectricalshock.

•Findtheroomemergencypower-off(EPO)switch,disconnectingswitch,orelectricaloutlet.Ifanelectrical accidentoccurs,youcanthenoperatetheswitchorunplugthepowercordquickly.

•Donotworkaloneunderhazardousconditionsornearequipmentthathashazardousvoltages.

•Disconnectallpowerbefore: –Performingamechanicalinspection –Workingnearpowersupplies –Removingorinstallingmainunits

•Beforeyoustarttoworkonthemachine,unplugthepowercord.Ifyoucannotunplugit,askthecustomer topower-offthewallboxthatsuppliespowertothemachine,andtolockthewallboxintheoffposition.

•Ifyouneedtoworkonamachinethathasexposedelectricalcircuits,observethefollowingprecautions: –Ensurethatanotherperson,familiarwiththepower-offcontrols,isnearyou.

Attention:Anotherpersonmustbetheretoswitchoffthepower,ifnecessary.

–Useonlyonehandwhenworkingwithpowered-onelectricalequipment;keeptheotherhandinyour

pocketorbehindyourback.

Attention:Anelectricalshockcanoccuronlywhenthereisacompletecircuit.Byobservingtheabove rule,youmaypreventacurrentfrompassingthroughyourbody.

–Whenusingtesters,setthecontrolscorrectlyandusetheapprovedprobeleadsandaccessoriesfor

thattester.

–Standonsuitablerubbermats(obtainedlocally,ifnecessary)toinsulateyoufromgroundssuchas

metalﬂoorstripsandmachineframes. Observethespecialsafetyprecautionswhenyouworkwithveryhighvoltages;Instructionsforthese precautionsareinthesafetysectionsofmaintenanceinformation.Useextremecarewhenmeasuring highvoltages.

•Regularlyinspectandmaintainyourelectricalhandtoolsforsafeoperationalcondition.

•Donotusewornorbrokentoolsandtesters.

•Neverassumethatpowerhasbeendisconnectedfromacircuit.First,checkthatithasbeenpoweredoff.

•Alwayslookcarefullyforpossiblehazardsinyourworkarea.Examplesofthesehazardsaremoistﬂoors, nongroundedpowerextensioncables,powersurges,andmissingsafetygrounds.

•Donottouchliveelectricalcircuitswiththereﬂectivesurfaceofaplasticdentalmirror.Thesurfaceis conductive;suchtouchingcancausepersonalinjuryandmachinedamage.

•Donotservicethefollowingpartswiththepoweronwhentheyareremovedfromtheirnormaloperating placesinamachine: –Powersupplyunits –Pumps –Blowersandfans –Motorgenerators –Similarunitstolistedabove Thispracticeensurescorrectgroundingoftheunits.

•Ifanelectricalaccidentoccurs: –Usecaution;donotbecomeavictimyourself. –Switchoffpower.

2HardwareMaintenanceManual

–Sendanotherpersontogetmedicalaid.

Safetyinspectionguide

Thepurposeofthisinspectionguideistoassistyouinidentifyingpotentiallyunsafeconditions.Aseach machinewasdesignedandbuilt,requiredsafetyitemswereinstalledtoprotectusersandservicetechnicians frominjury.Thisguideaddressesonlythoseitems.Y oushouldusegoodjudgmenttoidentifypotential safetyhazardsduetoattachmentofnon- ThinkPadfeaturesoroptionsnotcoveredbythisinspectionguide.

Ifanyunsafeconditionsarepresent,youmustdeterminehowserioustheapparenthazardcouldbeand whetheryoucancontinuewithoutﬁrstcorrectingtheproblem.

Considertheseconditionsandthesafetyhazardstheypresent:

•Electricalhazards,especiallyprimarypower(primaryvoltageontheframecancauseseriousorfatal electricalshock)

•Explosivehazards,suchasadamagedCRTfaceorabulgingcapacitor

•Mechanicalhazards,suchaslooseormissinghardware

Todeterminewhetherthereareanypotentiallyunsafeconditions,usethefollowingchecklistatthebeginning ofeveryservicetask.Beginthecheckswiththepoweroff,andthepowercorddisconnected.

Checklist:

1.Checkexteriorcoversfordamage(loose,broken,orsharpedges).

2.Poweroffthecomputer.Disconnectthepowercord.

3.Checkthepowercordfor:

a.Athird-wiregroundconnectoringoodcondition.Useametertomeasurethird-wireground

continuityfor0.1ohmorlessbetweentheexternalgroundpinandtheframeground.

b.Thepowercordshouldbethetypespeciﬁedinthepartslist.

c.Insulationmustnotbefrayedorworn.

4.Checkforcrackedorbulgingbatteries.

5.Removethecover.

6.Checkforanyobviousnon- ThinkPadalterations.Usegoodjudgmentastothesafetyofany non-ThinkPadalterations.

7.Checkinsidetheunitforanyobviousunsafeconditions,suchasmetalﬁlings,contamination,wateror otherliquids,orsignsofﬁreorsmokedamage.

8.Checkforworn,frayed,orpinchedcables.

9.Checkthatthepower-supplycoverfasteners(screwsorrivets)havenotbeenremovedortamperedwith.

Handlingdevicesthataresensitivetoelectrostaticdischarge

Anycomputerpartcontainingtransistorsorintegratedcircuits(ICs)shouldbeconsideredsensitiveto electrostaticdischarge(ESD.)ESDdamagecanoccurwhenthereisadifferenceinchargebetweenobjects. ProtectagainstESDdamagebyequalizingthechargesothatthemachine,thepart,theworkmat,andthe personhandlingthepartareallatthesamecharge.

Notes:

1.Useproduct-speciﬁcESDprocedureswhentheyexceedtherequirementsnotedhere.

2.MakesurethattheESDprotectivedevicesyouusehavebeencertiﬁed(ISO9000)asfullyeffective.

Chapter1.Safetyinformation3

WhenhandlingESD-sensitiveparts:

•Keepthepartsinprotectivepackagesuntiltheyareinsertedintotheproduct.

•Avoidcontactwithotherpeople.

•Wearagroundedwriststrapagainstyourskintoeliminatestaticonyourbody.

•Preventthepartfromtouchingyourclothing.Mostclothingisinsulativeandretainsachargeeven whenyouarewearingawriststrap.

•Useagroundedworkmattoprovideastatic-freeworksurface.Thematisespeciallyusefulwhen handlingESD-sensitivedevices.

•Selectagroundingsystem,suchasthoselistedbelow,toprovideprotectionthatmeetsthespeciﬁc servicerequirement.

Note:TheuseofagroundingsystemtoguardagainstESDdamageisdesirablebutnotnecessary.

–AttachtheESDgroundcliptoanyframeground,groundbraid,orgreen-wireground.

–Whenworkingonadouble-insulatedorbattery-operatedsystem,useanESDcommongroundor

referencepoint.Youcanusecoaxorconnector-outsideshellsonthesesystems.

–Usetheroundgroundprongoftheacplugonac-operatedcomputers.

Groundingrequirements

Electricalgroundingofthecomputerisrequiredforoperatorsafetyandcorrectsystemfunction.Proper groundingoftheelectricaloutletcanbeveriﬁedbyacertiﬁedelectrician.