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Lenovo ThinkPad T420 2620, 4177Q5U, 4177QKU, 4177R3U, 41786UU Hardware Maintenance Manual

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ThinkPadT420andT420i HardwareMaintenanceManual
Note:Beforeusingthisinformationandtheproductitsupports,besuretoreadthegeneralinformation underAppendixA“Notices”onpage179.
FirstEdition(February2011)
©CopyrightLenovo2011.
LIMITEDANDRESTRICTEDRIGHTSNOTICE:Ifproducts,data,computersoftware,orservicesaredeliveredpursuant aGeneralServicesAdministration“GSA”contract,use,reproduction,ordisclosureissubjecttorestrictionssetforth inContractNo.GS-35F-05925.
Contents
Aboutthismanual...........iii
Chapter1.Safetyinformation.....1
Generalsafety................1
Electricalsafety...............2
Safetyinspectionguide............3
Handlingdevicesthataresensitivetoelectrostatic
discharge..................4
Groundingrequirements............4
Safetynotices(multilingualtranslations)......5
Lasercompliancestatement(multilingual
translations)................17
Chapter2.Importantservice
information..............23
StrategyforreplacingFRUs.........23
Strategyforreplacingaharddiskdrive...24 Importantnoticeforreplacingasystem
board................24
Howtouseerrormessage........24
StrategyforreplacingFRUsforCTO,CMV ,and
GAV...................25
Productdenition............25
FRUidenticationforCTO,CMV ,andGAV
products...............25
Chapter3.Generalcheckout.....27
Whattodorst..............28
Checkoutguide..............29
DiagnosticsusingPC-DoctorforDOS....29
LenovoThinkVantageT oolbox.......31
FRUtests...............33
Powersystemcheckout...........35
Checkingtheacpoweradapter......35
Checkingoperationalcharging......35
Checkingthebatterypack........36
Checkingthebackupbattery.......36
Chapter4.Relatedservice
information..............39
RestoringthefactorycontentsbyusingRecovery
DiscSet.................39
Passwords................40
Power-onpassword...........40
Hard-diskpassword...........40
Supervisorpassword..........41
Howtoremovethepower-onpassword...41 Howtoremovethehard-diskpassword...41
Powermanagement............43
Screenblankmode...........43
Sleep(standby)mode..........43
Hibernationmode...........44
Symptom-to-FRUindex...........45
Numericerrorcodes..........45
Errormessages............47
Beepsymptoms............48
No-beepsymptoms...........48
LCD-relatedsymptoms.........49
Intermittentproblems..........50
Undeterminedproblems.........50
Chapter5.Statusindicators.....51
Chapter6.Fnkeycombinations...55
Chapter7.FRUreplacement
notices................59
Screwnotices...............59
Retainingserialnumbers...........60
Restoringtheserialnumberofthesystem
unit.................60
RetainingtheUUID...........60
ReadingorwritingtheECAinformation...61
Chapter8.Removingandreplacinga
FRU..................63
BeforeservicingThinkPadT420andT420i...64
1010Batterypack.............65
1020ExpressCardblankbezel........66
1030SerialUltrabayEnhanceddeviceortravel
bezel..................67
1040Harddiskdrive(HDD)andsolidstatedrive
(SSD)..................68
1050DIMMslotcover............71
1060DIMM(intheslotontheundersideofthe
computer)................72
1070PCIExpressMiniCardforwirelessWAN..73
1080Keyboard..............75
1090DIMM(intheslotunderthekeyboard)...80
1100Backupbattery............82
1110PCIExpressMiniCardforwirelessLAN..84 1120Keyboardbezelassembly,FPCcable,and
Bluethoothdaughtercard(BDC-2.1)......86
1130SmartCardorContactlessSmartCard...91
1140Modemdaughtercard(MDC).......93
1150Speakerassembly...........94
©CopyrightLenovo2011
i
1160LCDunit...............96
1170Fanassembly.............101
1180CPU................106
1190BasecoverassemblyandDC-inconnector
cable..................107
1200Magnesiumstructureframe.......112
1210SystemboardandExpressCardslot
assembly.................114
2010LCDbezelassembly..........117
2020LEDboard..............118
2030Integratedcamera...........120
2040LCDpanelandLCDcable........122
2050Cameracable.............124
2060WirelessLANantennaassemblyorwireless
LAN/WANantennaassembly.........125
2070HingesandLCDrearcoverassembly...127
Chapter9.Locations........129
Frontview................129
Rearview.................131
Bottomview...............132
Chapter10.Partslist........133
Overall..................134
LCDFRUs................154
Keyboard.................166
Miscellaneousparts............167
Informationaboutacpoweradapters......170
Powercords...............171
Recoverydiscs..............172
Windows7Professional(32bit)DVDs....173
Windows7Professional(64bit)DVDs....174
Windows7HomeBasic(32bit)DVDs....175
Windows7HomePremium(32bit)DVDs..176 Windows7HomePremium(64bit)DVDs..177
Commonservicetools...........178
AppendixA.Notices........179
Trademarks................180
iiThinkPadT420andT420iHardwareMaintenanceManual
Aboutthismanual
ThismanualcontainsserviceandreferenceinformationforthefollowingThinkPad
®
products.
ThinkPadT420andT420iMachineType4177,4178,4179,4180,4236,4237,and4238
Usethismanualalongwiththeadvanceddiagnosticteststotroubleshootproblems.
Important:
ThismanualisintendedonlyfortrainedservicetechnicianswhoarefamiliarwithThinkPadproducts.Usethis manualalongwiththeadvanceddiagnosticteststotroubleshootproblemseffectively . BeforeservicingaThinkPadproduct,besuretoreadalltheinformationunderChapter1“Safetyinformation”on page1andChapter2“Importantserviceinformation”onpage23.
©CopyrightLenovo2011
iii
ivThinkPadT420andT420iHardwareMaintenanceManual
Chapter1.Safetyinformation
Thischapterpresentsfollowingsafetyinformationthatyouneedtobefamiliarwithbeforeyouservice aThinkPadNotebook.
•“Generalsafety”onpage1
•“Electricalsafety”onpage2
•“Safetyinspectionguide”onpage3
•“Handlingdevicesthataresensitivetoelectrostaticdischarge”onpage4
•“Groundingrequirements”onpage4
•“Safetynotices(multilingualtranslations)”onpage5
•“Lasercompliancestatement(multilingualtranslations)”onpage17
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
1
Electricalsafety
Observethefollowingruleswhenworkingonelectricalequipment.
Important:
Useonlyapprovedtoolsandtestequipment.Somehandtoolshavehandlescoveredwithasoftmaterialthatdoes notinsulateyouwhenworkingwithliveelectricalcurrents. Manycustomershave,neartheirequipment,rubberoormatsthatcontainsmallconductiveberstodecrease electrostaticdischarges.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
metaloorstripsandmachineframes. Observethespecialsafetyprecautionswhenyouworkwithveryhighvoltages;Instructionsforthese precautionsareinthesafetysectionsofmaintenanceinformation.Useextremecarewhenmeasuring highvoltages.
•Regularlyinspectandmaintainyourelectricalhandtoolsforsafeoperationalcondition.
•Donotusewornorbrokentoolsandtesters.
•Neverassumethatpowerhasbeendisconnectedfromacircuit.First,checkthatithasbeenpoweredoff.
•Alwayslookcarefullyforpossiblehazardsinyourworkarea.Examplesofthesehazardsaremoistoors, nongroundedpowerextensioncables,powersurges,andmissingsafetygrounds.
•Donottouchliveelectricalcircuitswiththereectivesurfaceofaplasticdentalmirror.Thesurfaceis conductive;suchtouchingcancausepersonalinjuryandmachinedamage.
•Donotservicethefollowingpartswiththepoweronwhentheyareremovedfromtheirnormaloperating placesinamachine: –Powersupplyunits –Pumps –Blowersandfans –Motorgenerators –Similarunitstolistedabove Thispracticeensurescorrectgroundingoftheunits.
•Ifanelectricalaccidentoccurs:
2ThinkPadT420andT420iHardwareMaintenanceManual
–Usecaution;donotbecomeavictimyourself. –Switchoffpower. –Sendanotherpersontogetmedicalaid.
Electronicemissionsnotices
ForelectronicemissioninformationonClassBdigitaldevices,refertothecorrespondinginformationin theUserGuide.
Safetyinspectionguide
Thepurposeofthisinspectionguideistoassistyouinidentifyingpotentiallyunsafeconditions.Aseach machinewasdesignedandbuilt,requiredsafetyitemswereinstalledtoprotectusersandservicetechnicians frominjury.Thisguideaddressesonlythoseitems.Y oushouldusegoodjudgmenttoidentifypotential safetyhazardsduetoattachmentofnon- ThinkPadfeaturesoroptionsnotcoveredbythisinspectionguide.
Ifanyunsafeconditionsarepresent,youmustdeterminehowserioustheapparenthazardcouldbeand whetheryoucancontinuewithoutrstcorrectingtheproblem.
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.Thepowercordshouldbethetypespeciedinthepartslist.
c.Insulationmustnotbefrayedorworn.
4.Checkforcrackedorbulgingbatteries.
5.Removethecover.
6.Checkforanyobviousnon- ThinkPadalterations.Usegoodjudgmentastothesafetyofany non-ThinkPadalterations.
7.Checkinsidetheunitforanyobviousunsafeconditions,suchasmetallings,contamination,wateror otherliquids,orsignsofreorsmokedamage.
8.Checkforworn,frayed,orpinchedcables.
9.Checkthatthepower-supplycoverfasteners(screwsorrivets)havenotbeenremovedortamperedwith.
Chapter1.Safetyinformation3
Handlingdevicesthataresensitivetoelectrostaticdischarge
Anycomputerpartcontainingtransistorsorintegratedcircuits(ICs)shouldbeconsideredsensitiveto electrostaticdischarge(ESD).ESDdamagecanoccurwhenthereisadifferenceinchargebetweenobjects. ProtectagainstESDdamagebyequalizingthechargesothatthemachine,thepart,theworkmat,andthe personhandlingthepartareallatthesamecharge.
Notes:
1.Useproduct-specicESDprocedureswhentheyexceedtherequirementsnotedhere.
2.MakesurethattheESDprotectivedevicesyouusehavebeencertied(ISO9000)asfullyeffective.
WhenhandlingESD-sensitiveparts:
•Keepthepartsinprotectivepackagesuntiltheyareinsertedintotheproduct.
•Avoidcontactwithotherpeople.
•Wearagroundedwriststrapagainstyourskintoeliminatestaticonyourbody.
•Preventthepartfromtouchingyourclothing.Mostclothingisinsulativeandretainsachargeevenwhen youarewearingawriststrap.
•Useagroundedworkmattoprovideastatic-freeworksurface.Thematisespeciallyusefulwhen handlingESD-sensitivedevices.
•Selectagroundingsystem,suchasthoselistedbelow,toprovideprotectionthatmeetsthespecic servicerequirement.
Note:TheuseofagroundingsystemtoguardagainstESDdamageisdesirablebutnotnecessary.
–AttachtheESDgroundcliptoanyframeground,groundbraid,orgreen-wireground.
–Whenworkingonadouble-insulatedorbattery-operatedsystem,useanESDcommongroundor
referencepoint.Y oucanusecoaxorconnector-outsideshellsonthesesystems.
–Usetheroundgroundprongoftheacplugonac-operatedcomputers.
Groundingrequirements
Electricalgroundingofthecomputerisrequiredforoperatorsafetyandcorrectsystemfunction.Proper groundingoftheelectricaloutletcanbeveriedbyacertiedelectrician.
4ThinkPadT420andT420iHardwareMaintenanceManual
Safetynotices(multilingualtranslations)
Thesafetynoticesinthissectionareprovidedinthefollowinglanguages:
•English
•Arabic
•BrazilianPortuguese
•French
•German
•Hebrew
•Japanese
•Korean
•Spanish
•T raditionalChinese
DANGER
BeforethecomputerispoweredonafterFRUreplacement,makesureallscrews,springs,andothersmall partsareinplaceandarenotleftlooseinsidethecomputer.Verifythisbyshakingthecomputerandlistening forrattlingsounds.Metallicpartsormetalakescancauseelectricalshorts.
DANGER
Somestandbybatteriescontainasmallamountofnickelandcadmium.Donotdisassembleastandbybattery, rechargeit,throwitintoreorwater,orshort-circuitit.Disposeofthebatteryasrequiredbylocalordinances orregulations.Useonlythebatteryintheappropriatepartslisting.Useofanincorrectbatterycanresult inignitionorexplosionofthebattery.
DANGER
Thebatterypackcontainssmallamountsofnickel.Donotdisassembleit,throwitintoreorwater ,or short-circuitit.Disposeofthebatterypackasrequiredbylocalordinancesorregulations.Useonlythe batteryintheappropriatepartslistingwhenreplacingthebatterypack.Useofanincorrectbatterycanresult inignitionorexplosionofthebattery.
DANGER
Thelithiumbatterycancauseare,anexplosion,orasevereburn.Donotrechargeit,removeitspolarized connector,disassembleit,heatitabove100°C(212°F),incinerateit,orexposeitscellcontentstowater. Disposeofthebatteryasrequiredbylocalordinancesorregulations.Useonlythebatteryintheappropriate partslisting.Useofanincorrectbatterycanresultinignitionorexplosionofthebattery.
Chapter1.Safetyinformation5
DANGER
IftheLCDbreaksandtheuidfrominsidetheLCDgetsintoyoureyesoronyourhands,immediatelywash theaffectedareaswithwaterforatleast15minutes.Seekmedicalcareifanysymptomsfromtheuidare presentafterwashing.
DANGER
Toavoidshock,donotremovetheplasticcoverthatprotectsthelowerpartoftheinvertercard.
DANGER
Thoughthemainbatterieshavelowvoltage,ashortedorgroundedbatterycanproduceenoughcurrentto burnpersonnelorcombustiblematerials.
DANGER
UnlesshotswapisallowedfortheFRUbeingreplaced,doasfollowsbeforeremovingit:poweroffthe computer,unplugallpowercordsfromelectricaloutlets,removethebatterypack,anddisconnectany interconnectingcables.
6ThinkPadT420andT420iHardwareMaintenanceManual
PERIGO
Chapter1.Safetyinformation7
AntesdeligarocomputadorapósasubstituiçãodaFRU,certique-sedequetodososparafusos,molase outraspeçaspequenasestejamnolugarenãoestejamsoltosdentrodocomputador.Veriqueissosacudindo ocomputadoreprocurandoouvirsonsdepeçassoltas.Peçasmetálicasoulascasdemetalpodemcausar curto-circuito.
PERIGO
Algumasbateriasreservacontêmumapequenaquantidadedeníquelecádmio.Nãodesmonteumabateria reserva,recarregue-a,jogue-anofogoounaágua,oudeixe-aentraremcurto-circuito.Descarteabateria conformerequeridopelasleisouregulamentoslocais.Usesomenteabaterianasparteslistadasapropriadas. Ousodeumabateriaincorretapoderesultaremcombustãoouexplosãodabateria.
PERIGO
Opacotedabateriacontémumapequenaquantidadedeníquel.Nãoodesmonte,jogue-onofogoouna água,oudeixe-oentraremcurto-circuito.Descarteopacotedabateriaconformerequeridopelasleisou regulamentoslocais.Usesomenteabaterianasparteslistadasapropriadasaosubstituiropacotedabateria. Ousodeumabateriaincorretapoderesultaremcombustãoouexplosãodabateria.
PERIGO
Abateriadelítiopodecausarincêndio,explosãoougravesqueimaduras.Nãoarecarregue,removaseu conectorpolarizado,desmonte-a,aqueça-aacimade100°C(212°F),incinere-a,ouexponhaoconteúdode suacélulaàágua.Descarteabateriaconformerequeridopelasleisouregulamentoslocais.Usesomente abaterianasparteslistadasapropriadas.Ousodeumabateriaincorretapoderesultaremcombustão ouexplosãodabateria.
PERIGO
SeoLCDquebrareouidodedentrodeleentraremcontatocomseusolhosoucomsuasmãos,laveas áreasafetadasimediatamentecomáguadurantepelomenos15minutos.Procurecuidadosmédicossealgum sintomacausadopelouidosurgirapósalavagem.
PERIGO
Paraevitarchoqueelétrico,nãoremovaacapaplásticaqueprotegeaparteinferiordaplacainversora.
PERIGO
8ThinkPadT420andT420iHardwareMaintenanceManual
Emboraasprincipaisbateriaspossuambaixavoltagem,umabateriaemcurto-circuitoouaterradapode produzircorrenteobastanteparaqueimarmateriaisdepessoalouinamáveis.
PERIGO
AmenosqueumahotswapsejapermitidaparaaFRUqueestásendosubstituída,façaoseguinteantesde removê-la:desligueocomputador,desconectetodososcabosdeenergiadastomadas,removaopacotede bateriasedesconectequaisquercabosdeinterconexão.
DANGER
Avantderemettrel'ordinateursoustensionaprèsremplacementd'uneunitéenclientèle,vériezquetousles ressorts,visetautrespiècessontbienenplaceetbienxées.Pourcefaire,secouezl'unitéetassurez-vous qu'aucunbruitsuspectneseproduit.Despiècesmétalliquesoudescopeauxdemétalpourraientcauser uncourt-circuit.
DANGER
Certainesbatteriesdesecourscontiennentdunickeletducadmium.Nelesdémontezpas,nelesrechargez pas,nelesexposezniaufeuniàl'eau.Nelesmettezpasencourt-circuit.Pourlesmettreaurebut, conformez-vousàlaréglementationenvigueur.Lorsquevousremplacezlapiledesauvegardeoucellede l'horlogetempsréel,veillezàn'utiliserquelesmodèlescitésdanslalistedepiècesdétachéesadéquate.Une batterieouunepileinappropriéerisquedeprendrefeuoud'exploser.
DANGER
Labatteriecontientdunickel.Neladémontezpas,nel'exposezniaufeuniàl'eau.Nelamettezpasen court-circuit.Pourlamettreaurebut,conformez-vousàlaréglementationenvigueur.Lorsquevousremplacez labatterie,veillezàn'utiliserquelesmodèlescitésdanslalistedepiècesdétachéesadéquate.Eneffet,une batterieinappropriéerisquedeprendrefeuoud'exploser.
DANGER
Lapiledesauvegardecontientdulithium.Elleprésentedesrisquesd'incendie,d'explosionoudebrûlures graves.Nelarechargezpas,neretirezpassonconnecteurpolariséetneladémontezpas.Nel'exposezpasà unetemperaturesupérieureà100°C,nelafaitespasbrûleretn'enexposezpaslecontenuàl'eau.Mettezla pileaurebutconformémentàlaréglementationenvigueur .Unepileinappropriéerisquedeprendrefeuou d'exploser.
Chapter1.Safetyinformation9
DANGER
Silepanneaud'afchageàcristauxliquidessebriseetquevousrecevezdanslesyeuxousurlesmainsune partieduuide,rincez-lesabondammentpendantaumoinsquinzeminutes.Consultezunmédecinsides symptômespersistentaprèslelavage.
DANGER
And'évitertoutrisquedechocélectrique,neretirezpaslecacheenplastiqueprotégeantlapartieinférieure delacarted'alimentation.
DANGER
Bienquelevoltagedesbatteriesprincipalessoitpeuélevé,lecourt-circuitoulamiseàlamassed'une batteriepeutproduiresufsammentdecourantpourbrûlerdesmatériauxcombustiblesoucauserdes brûlurescorporellesgraves.
DANGER
Sileremplacementàchaudn'estpasautorisépourl'unitéremplaçablesursitequevousremplacez, procédezcommesuitavantderetirerl'unité:mettezl'ordinateurhorstension,débrancheztousles cordonsd'alimentationdesprisesdecourant,retirezleblocdebatterieetdéconnecteztouslescâbles d'interconnexion.
VORSICHT
BevornacheinemFRU-AustauschderComputerwiederangeschlossenwird,mußsichergestelltwerden,daß keineSchrauben,FedernoderandereKleinteilefehlenoderimGehäusevergessenwurden.DerComputermuß geschütteltundaufKlappergeräuschegeprüftwerden.Metallteileoder-splitterkönnenKurzschlüsseerzeugen.
VORSICHT
DieBereitschaftsbatterie,diesichunterdemDiskettenlaufwerkbendet,kanngeringeMengenNickel undCadmiumenthalten.SiedarfnurdurchdieVerkaufsstelleoderdenIBMKundendienstausgetauscht werden.Siedarfnichtzerlegt,wiederaufgeladen,kurzgeschlossen,oderFeueroderWasserausgesetzt werden.DieBatteriekannschwereVerbrennungenoderVerätzungenverursachen.BeiderEntsorgungdie örtlichenBestimmungenfürSondermüllbeachten.BeimErsetzenderBereitschafts-oderSystembatterienur BatteriendesTypsverwenden,derinderErsatzteillisteaufgeführtist.DerEinsatzfalscherBatterienkann zuEntzündungoderExplosionführen.
10ThinkPadT420andT420iHardwareMaintenanceManual
VORSICHT
AkkusenthaltengeringeMengenvonNickel.Siedürfennichtzerlegt,wiederaufgeladen,kurzgeschlossen, oderFeueroderWasserausgesetztwerden.BeiderEntsorgungdieörtlichenBestimmungenfürSondermüll beachten.BeimErsetzenderBatterienurBatteriendesT ypsverwenden,derinderErsatzteillisteaufgeführt ist.DerEinsatzfalscherBatterienkannzuEntzündungoderExplosionführen.
VORSICHT
DieSystembatterieisteineLithiumbatterie.Siekannsichentzünden,explodierenoderschwereVerbrennungen hervorrufen.BatteriendiesesT ypsdürfennichtaufgeladen,zerlegt,über100°Cerhitztoderverbranntwerden. AuchdarfihrInhaltnichtmitWasserinVerbindunggebrachtoderderzurrichtigenPolungangebrachte Verbindungssteckerentferntwerden.BeiderEntsorgungdieörtlichenBestimmungenfürSondermüll beachten.BeimErsetzenderBatterienurBatteriendesT ypsverwenden,derinderErsatzteillisteaufgeführt ist.DerEinsatzfalscherBatterienkannzuEntzündungoderExplosionführen.
VORSICHT
DieLeuchtstoffröhreimLCD-BildschirmenthältQuecksilber.BeiderEntsorgungdieörtlichenBestimmungen fürSondermüllbeachten.DerLCD-BildschirmbestehtausGlasundkannzerbrechen,wennerunsachgemäß behandeltwirdoderderComputeraufdenBodenfällt.WennderBildschirmbeschädigtistunddiedarin bendlicheFlüssigkeitinKontaktmitHautundAugengerät,solltendiebetroffenenStellenmindestens15 MinutenmitWasserabgespültundbeiBeschwerdenanschließendeinArztaufgesuchtwerden.
VORSICHT
AusSicherheitsgründendieKunststoffabdeckung,diedenunterenT eilderSpannungswandlerplatineumgibt, nichtentfernen.
VORSICHT
ObwohlHauptbatterieneineniedrigeSpannunghaben,könnensiedochbeiKurzschlußoderErdunggenug Stromabgeben,umbrennbareMaterialienzuentzündenoderVerletzungenbeiPersonenhervorzurufen.
VORSICHT
Chapter1.Safetyinformation11
WenneinAustauschderFRUbeilaufendemBetriebnichterlaubtist,gehenSiebeimAustauschderFRUwie folgtvor:SchaltenSiedenComputeraus,ziehenSiealleNetzkabelvondenNetzsteckdosenab,entfernen SiedenAkkuundziehenSieallemiteinanderverbundenenKabelab.
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Chapter1.Safetyinformation13
14ThinkPadT420andT420iHardwareMaintenanceManual
AntesdeencenderelsistemadespuesdesustituirunaFRU,compruebequetodoslostornillos,muellesy demáspiezaspequeñasseencuentranensusitioynoseencuentransueltasdentrodelsistema.Compruébelo agitandoelsistemayescuchandolosposiblesruidosqueprovocarían.Laspiezasmetálicaspuedencausar cortocircuitoseléctricos.
Algunasbateríasdereservacontienenunapequeñacantidaddeníquelycadmio.Nolasdesmonte,ni recargue,nilasechealfuegooalaguanilascortocircuite.Deséchelastalcomodisponelanormativalocal. Utilicesólobateríasqueseencuentrenenlalistadepiezas.Lautilizacióndeunabateríanoapropiada puedeprovocarlaigniciónoexplosióndelamisma.
Lasbateríascontienenpequeñascantidadesdeníquel.Nolasdesmonte,nirecargue,nilasechealfuego oalaguanilascortocircuite.Deséchelastalcomodisponelanormativalocal.Utilicesólobateríasquese encuentrenenlalistadepiezasalsustituirlabatería.Lautilizacióndeunabateríanoapropiadapuede provocarlaigniciónoexplosióndelamisma.
Labateríaderepuestoesunabateríadelitioypuedeprovocarincendios,explosionesoquemadurasgraves. Nolarecargue,niquiteelconectorpolarizado,niladesmonte,nicalienteporencimadelos100°C(212°F),ni laincinereniexpongaelcontenidodesusceldasalagua.Deséchelatalcomodisponelanormativalocal.
SilaLCDserompeyeluidodesuinteriorentraencontactoconsusojososusmanos,laveinmediatamente lasáreasafectadasconaguadurante15minutoscomomínimo.Obtengaatenciónmedicasisepresenta algúnsíntomadeluidodespuesdelavarse.
Chapter1.Safetyinformation15
Paraevitardescargas,noquitelacubiertadeplásticoquerodealapartebajadelatarjetainvertida.
Aunquelasbateríasprincipalestienenunvoltajebajo,unabateríacortocircuitadaoconcontactoatierra puedeproducirlacorrientesucientecomoparaquemarmaterialcombustibleoprovocarquemadurasen elpersonal.
Salvoquesepermitaelintercambioencalienteparalaunidadsustituiblelocalmente,realicelosiguienteantes deextraerla:apagueelsistema,desconectetodosloscablesdealimentacióndelastomasdealimentación eléctrica,extraigalabateríaydesconecteloscablesdeinterconexión.
16ThinkPadT420andT420iHardwareMaintenanceManual
Lasercompliancestatement(multilingualtranslations)
Thelasercompliancestatementsinthissectionareprovidedinthefollowinglanguages:
•English
•Arabic
•BrazilianPortuguese
•French
•German
•Hebrew
•Japanese
•Korean
•Spanish
•T raditionalChinese
Chapter1.Safetyinformation17
18ThinkPadT420andT420iHardwareMaintenanceManual
Chapter1.Safetyinformation19
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Chapter1.Safetyinformation21
22ThinkPadT420andT420iHardwareMaintenanceManual
Chapter2.Importantserviceinformation
Thischapterpresentsfollowingimportantserviceinformationthatappliestoallmachinetypessupportedby thismanual:
•“StrategyforreplacingFRUs”onpage23 –“Strategyforreplacingaharddiskdrive”onpage24 –“Importantnoticeforreplacingasystemboard”onpage24 –“Howtouseerrormessage”onpage24
•“StrategyforreplacingFRUsforCTO,CMV,andGAV”onpage25 –“Productdenition”onpage25 –“FRUidenticationforCTO,CMV ,andGAVproducts”onpage25
Important:
UEFIBIOSanddevicedriverxesarecustomer-installable.TheUEFIBIOSanddevicedriversarepostedonthe customersupportsite http://www.lenovo.com/support SystemDisassembly/ReassemblyvideosthatshowtheFRUremovalsorreplacementsfortheLenovo
®
authorized servicetechniciansareavailableinthefollowingsupportsite: http://www.lenovoservicetraining.com/ion/ AdvisecustomerstocontacttheCustomerSupportCenterat800-426-7378iftheyneedassistanceinobtainingor installinganysoftwarexes,drivers,andUEFIBIOSdownloads. CustomersinCanadashouldcalltheCustomerSupportCenterat800-565-3344forassistanceordownload information.
StrategyforreplacingFRUs
Beforereplacingparts:
Makesurethatallsoftwarexes,drivers,andUEFIBIOSdownloadsareinstalledbeforereplacingany FRUslistedinthismanual.
Afterasystemboardisreplaced,ensurethatthelatestUEFIBIOSisloadedtothesystemboardbefore completingtheserviceaction.
Todownloadsoftwarexes,drivers,andUEFIBIOS,doasfollows:
1.Gotohttp://www.lenovo.com/support.
2.EntertheproductnumberofthecomputerorpressAuto-detectbuttononthescreen.
3.SelectDownloadsanddrivers.
4.Followthedirectionsonthescreenandinstallthenecessarysoftware.
UsethefollowingstrategytopreventunnecessaryexpenseforreplacingandservicingFRUs:
•IfyouareinstructedtoreplaceaFRUbutthereplacementdoesnotcorrecttheproblem,reinstall theoriginalFRUbeforeyoucontinue.
•Somecomputershavebothaprocessorboardandasystemboard.Ifyouareinstructedtoreplaceeither theprocessorboardorthesystemboard,andreplacingoneofthemdoesnotcorrecttheproblem, reinstallthatboard,andthenreplacetheotherone.
•IfanadapteroradeviceconsistsofmorethanoneFRU,anyoftheFRUsmaybethecauseoftheerror. Beforereplacingtheadapterordevice,removetheFRUs,onebyone,toseeifthesymptomschange. ReplaceonlytheFRUthatchangedthesymptoms.
©CopyrightLenovo2011
23
Attention:Thesetupcongurationonthecomputeryouareservicingmayhavebeencustomized.Running AutomaticCongurationmayalterthesettings.Notethecurrentcongurationsettings(usingtheView Congurationoption);then,whenservicehasbeencompleted,verifythatthosesettingsremainineffect.
Strategyforreplacingaharddiskdrive
Alwaystrytorunalow-levelformatbeforereplacingaharddiskdrive.Thiswillcauseallcustomerdataon theharddisktobelost.Besurethatthecustomerhasacurrentbackupofthedatabeforedoingthistask.
Attention:Thedrivestartupsequenceinthecomputeryouareservicingmayhavebeenchanged.Be extremelycarefulduringwriteoperationssuchascopying,saving,orformatting.Ifyouselectanincorrect drive,dataorprogramscanbeoverwritten.
Importantnoticeforreplacingasystemboard
Somecomponentsmountedonasystemboardareverysensitive.Improperhandlingofasystemboardcan causedamagetothosecomponents,andmaycauseasystemmalfunction.
Attention:Whenhandlingasystemboard:
•Donotdropasystemboardorapplyanyexcessiveforcetoit.
•Avoidroughhandlingofanykind.
•AvoidbendingasystemboardandhardpushingtopreventcrackingateachBGA(BallGridArray)chipset.
Howtouseerrormessage
Usetheerrorcodesdisplayedonthescreentodiagnosefailures.Ifmorethanoneerrorcodeisdisplayed, beginthediagnosiswiththersterrorcode.Whatevercausesthersterrorcodemayalsocausefalseerror codes.Ifnoerrorcodeisdisplayed,seewhethertheerrorsymptomislistedintheSymptom-to-FRU Indexforthecomputeryouareservicing.
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