Lenovo ThinkCentre Maintenance Manual

ThinkCentre

HardwareMaintenanceManual

MachineTypes:5106,5110,5114,and5150

ThinkCentre

HardwareMaintenanceManual

MachineTypes:5106,5110,5114,and5150

Note:Beforeusingthisinformationandtheproductitsupports,besuretoreadandunderstandChapter2

“Safetyinformation”onpage3andAppendixA“Notices”onpage117.

SecondEdition(September2012)

©CopyrightLenovo2012.

LIMITEDANDRESTRICTEDRIGHTSNOTICE:IfdataorsoftwarearedeliveredpursuantaGeneralServices

Administration“GSA”contract,use,reproduction,ordisclosureissubjecttorestrictionssetforthinContractNo.

GS-35F-05925.

Contents

Chapter1.Aboutthismanual......1

ImportantSafetyInformation..........1

Chapter2.Safetyinformation......3

Generalsafety................3

Electricalsafety...............3

Safetyinspectionguide............5

Handlingelectrostaticdischarge-sensitive

devices..................5

Groundingrequirements............6

Safetynotices(multi-lingualtranslations).....6

Chapter3.Generalinformation....29

Specications...............29

Lenovoprograms.............29

AccessingLenovoprogramsontheWindows

7operatingsystem...........29

AccessingLenovoprogramsontheWindows

8operatingsystem...........31

Additionalinformationresources.......31

Chapter4.GeneralCheckout.....33

Problemdeterminationtips..........33

Chapter5.Troubleshootingand

diagnostics..............35

Basictroubleshooting............35

AccessingControlPanelontheWindows8

operatingsystem..............36

Troubleshootingprocedure..........36

Troubleshooting..............37

Audioproblems............38

CDproblems.............39

DVDproblems.............40

Intermittentproblems..........41

Keyboard,mouse,orpointingdevice

problems...............41

Monitorproblems............43

Networkingproblems..........45

Optionproblems............47

Performanceandlockupproblems.....48

Printerproblems............50

Serialportproblems...........50

Softwareproblems...........51

USBproblems.............52

Diagnostics................52

LenovoSolutionCenter.........52

Chapter6.UsingtheSetupUtility

program................55

StartingtheSetupUtilityprogram.......55

Viewingandchangingsettings........55

Usingpasswords..............55

Passwordconsiderations.........56

Power-OnPassword..........56

AdministratorPassword.........56

HardDiskPassword...........56

Setting,changing,anddeletingapassword.56

Enablingordisablingadevice........57

Selectingastartupdevice..........57

Selectingatemporarystartupdevice....57

Selectingorchangingthestartupdevice

sequence...............57

EnablingErPcompliancemode........58

ChangingtheBIOSsettingsbeforeinstallinganew

operatingsystem..............58

ExitingtheSetupUtilityprogram.......59

Chapter7.Symptom-to-FRUIndex..61

Harddiskdrivebooterror..........61

PowerSupplyProblems...........61

Beepsymptoms..............61

POSTerrorcodes.............62

Miscellaneouserrorconditions........63

Undeterminedproblems...........65

Chapter8.Locations.........67

Locatingconnectors,controls,andindicatorson

thefrontofyourcomputer..........67

Locatingconnectorsontherearofyour

computer...............68

LocatingmajorFRUsandCRUs......69

LookingupFRUinformation.......70

Locatingpartsonthesystemboard....71

Chapter9.ReplacingFRUs......73

Adjustingthecomputerstand.........73

Removingthecomputerstand........73

Removingthecomputercover........74

Openingandclosingthesystemboardshielding.75

Openingthesystemboardshielding....75

Closingthesystemboardshielding.....76

ReplacingtherearI/Oshielding........78

RemovingtherearI/Oshielding......78

InstallingtherearI/Oshielding.......78

Replacingtheharddiskdrive.........79

©CopyrightLenovo2012

iii

Removingtheharddiskdrive.......79

Installingaharddiskdrive........80

Replacingtheopticaldrive..........81

Removingtheopticaldrive........82

Installinganopticaldrive.........82

Replacingthememorymodule........83

Removingthememorymodule......84

Installingamemorymodule........84

Replacingthemicroprocessorfanassembly...85

Removingthemicroprocessorfanassembly.85

Installingamicroprocessorfanassembly..87

Replacingthemicroprocessorandheatsink

assembly.................88

Removingthemicroprocessorandheatsink

assembly...............89

Installingthemicroprocessorandheatsink

assembly...............90

Replacingthesystemboard.........92

Removingthesystemboard.......92

Installingasystemboard.........93

Replacingtheinternalspeakers........94

Removingtheinternalspeakers......94

Installinginternalspeakers........94

ReplacingtherearI/Oassembly........95

RemovingtherearI/Oassembly......95

InstallingarearI/Oassembly.......96

Replacingtheinverter............97

Removingtheinverter..........98

Installinganinverter...........99

Replacingthebattery............100

Removingthebattery..........100

Installingabattery...........101

Replacingthepowersupplyassembly.....101

Removingthepowersupplyassembly...101

Installingapowersupplyassembly.....103

ReplacingtheLCDpanel...........105

RemovingtheLCDpanel.........105

InstallinganLCDpanel.........106

ReplacingtheWIFIcard...........107

RemovingtheWIFIcard.........107

InstallingtheWIFIcard..........108

Installingacomputerwallmount.......109

CompletingtheFRUinstallation........109

Installingacomputercover........110

Installingacomputerstand........110

Chapter10.AdditionalService

Information.............113

Securityfeatures..............113

HardwarecontrolledPasswords......113

Operatingsystempassword.......113

Vitalproductdata............113

BIOSlevels................113

Flashupdateprocedures..........113

Updating(ashing)theBIOSfromadisc....114

Updating(ashing)theBIOSfromyouroperating

system..................115

RecoveringfromaPOST/BIOSupdatefailure..115

Powermanagement............116

Automaticcongurationandpowerinterface

(ACPI)BIOS..............116

AutomaticPower-Onfeatures.......116

AppendixA.Notices.........117

Televisionoutputnotice...........118

EuropeanconformanceCEmark.......118

Trademarks................118

Index.................119

ivThinkCentreHardwareMaintenanceManual

Chapter1.Aboutthismanual

ThismanualprovidesserviceandreferenceinformationforThinkCentre

®

computerslistedonthefrontcover.

ThismanualisintendedonlyfortrainedservicepersonnelwhoarefamiliarwithLenovo

®

computerproducts.

BeforeservicingaLenovocomputerproduct,besuretoread“ImportantSafetyInformation”onpage1.

Chapter7“Symptom-to-FRUIndex”onpage61andChapter10“AdditionalServiceInformation”onpage

113arenotspecictoanymachinetypeandareapplicabletoallThinkCentrecomputers.

FormajorFieldReplaceableUnits(FRU)locationsandCustomerReplaceableUnit(CRU)identication,

seeChapter8“Locations”onpage67.

ForFRUreplacementinstructions,seeChapter9“ReplacingFRUs”onpage73.

ForFRUpartnumbers,goto:

http:/www.lenovo.com/serviceparts-lookup

ImportantSafetyInformation

Besuretoreadallcautionanddangerstatementsinthisbookbeforeperforminganyoftheinstructions.

VeuillezliretouteslesconsignesdetypeDANGERetATTENTIONduprésentdocumentavantd'exécuter

lesinstructions.

LesenSieunbedingtalleHinweisevomTyp"ACHTUNG"oder"VORSICHT"indieserDokumentation,bevor

SieirgendwelcheVorgängedurchführen

LeggereleistruzioniintrodottedaATTENZIONEePERICOLOpresentinelmanualeprimadieseguireuna

qualsiasidelleistruzioni

Certique-sedelertodasasinstruçõesdecuidadoeperigonestemanualantesdeexecutarqualquer

umadasinstruções

Esimportantequeleatodaslasdeclaracionesdeprecauciónydepeligrodeestemanualantesdeseguir

lasinstrucciones.

©CopyrightLenovo2012

1

2ThinkCentreHardwareMaintenanceManual

Chapter2.Safetyinformation

Thischaptercontainsthesafetyinformationthatyouneedtobefamiliarwithbeforeservicingacomputer.

Generalsafety

Followtheserulestoensuregeneralsafety:

•Observegoodhousekeepingintheareaofthemachinesduringandaftermaintenance.

•Whenliftinganyheavyobject:

1.Ensureyoucanstandsafelywithoutslipping.

2.Distributetheweightoftheobjectequallybetweenyourfeet.

3.Useaslowliftingforce.Nevermovesuddenlyortwistwhenyouattempttolift.

4.Liftbystandingorbypushingupwithyourlegmuscles;thisactionremovesthestrainfromthe

musclesinyourback.

Donotattempttoliftanyobjectsthatweighmorethan16kg(35lb)orobjectsthatyouthinkare

tooheavyforyou.

•Donotperformanyactionthatcauseshazardstothecustomer,orthatmakestheequipmentunsafe.

•Beforeyoustartthemachine,ensurethatotherservicerepresentativesandthecustomer'spersonnelare

notinahazardousposition.

•Placeremovedcoversandotherpartsinasafeplace,awayfromallpersonnel,whileyouareservicing

themachine.

•Keepyourtoolcaseawayfromwalkareassothatotherpeoplewillnottripoverit.

•Donotwearlooseclothingthatcanbetrappedinthemovingpartsofamachine.Ensurethatyoursleeves

arefastenedorrolledupaboveyourelbows.Ifyourhairislong,fastenit.

•Inserttheendsofyournecktieorscarfinsideclothingorfastenitwithanonconductiveclip,approximately

8centimeters(3inches)fromtheend.

•Donotwearjewelry,chains,metal-frameeyeglasses,ormetalfastenersforyourclothing.

Remember:Metalobjectsaregoodelectricalconductors.

•Wearsafetyglasseswhenyouare:hammering,drilling,soldering,cuttingwire,attachingsprings,using

solvents,orworkinginanyotherconditionsthatmightbehazardoustoyoureyes.

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

thatiswornordefective.

•Reinstallallcoverscorrectlybeforereturningthemachinetothecustomer.

Electricalsafety

CAUTION:

Electricalcurrentfrompower,telephone,andcommunicationcablescanbehazardous.Toavoid

personalinjuryorequipmentdamage,disconnecttheattachedpowercords,telecommunication

systems,networks,andmodemsbeforeyouopenthecomputercovers,unlessinstructedotherwise

intheinstallationandcongurationprocedures.

Observethefollowingruleswhenworkingonelectricalequipment.

©CopyrightLenovo2012

3

Important:Useonlyapprovedtoolsandtestequipment.Somehandtoolshavehandlescoveredwithasoft

materialthatdoesnotinsulateyouwhenworkingwithliveelectricalcurrents.Manycustomershave,near

theirequipment,rubberoormatsthatcontainsmallconductiveberstodecreaseelectrostaticdischarges.

Donotusethistypeofmattoprotectyourselffromelectricalshock.

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

accidentoccurs,youcanthenoperatetheswitchorunplugthepowercordquickly.

•Donotworkaloneunderhazardousconditionsornearequipmentthathashazardousvoltages.

•Disconnectallpowerbefore:

–Performingamechanicalinspection

–Workingnearpowersupplies

–RemovingorinstallingFieldReplaceableUnits(FRUs)

•Beforeyoustarttoworkonthemachine,unplugthepowercord.Ifyoucannotunplugit,askthecustomer

topower-offthewallboxthatsuppliespowertothemachineandtolockthewallboxintheoffposition.

•Ifyouneedtoworkonamachinethathasexposedelectricalcircuits,observethefollowingprecautions:

–Ensurethatanotherperson,familiarwiththepower-offcontrols,isnearyou.

Remember:Anotherpersonmustbetheretoswitchoffthepower,ifnecessary.

–Useonlyonehandwhenworkingwithpowered-onelectricalequipment;keeptheotherhandinyour

pocketorbehindyourback.

Remember:Theremustbeacompletecircuittocauseelectricalshock.Byobservingtheaboverule,

youmaypreventacurrentfrompassingthroughyourbody.

–Whenusingatester,setthecontrolscorrectlyandusetheapprovedprobeleadsandaccessoriesfor

thattester.

–Standonsuitablerubbermats(obtainedlocally,ifnecessary)toinsulateyoufromgroundssuchas

metaloorstripsandmachineframes.

Observethespecialsafetyprecautionswhenyouworkwithveryhighvoltages;theseinstructionsarein

thesafetysectionsofmaintenanceinformation.Useextremecarewhenmeasuringhighvoltages.

•Regularlyinspectandmaintainyourelectricalhandtoolsforsafeoperationalcondition.

•Donotusewornorbrokentoolsandtesters.

•Neverassumethatpowerhasbeendisconnectedfromacircuit.First,checkthatithasbeenpowered-off.

•Alwayslookcarefullyforpossiblehazardsinyourworkarea.Examplesofthesehazardsaremoistoors,

nongroundedpowerextensioncables,powersurges,andmissingsafetygrounds.

•Donottouchliveelectricalcircuitswiththereectivesurfaceofaplasticdentalmirror.Thesurfaceis

conductive;suchtouchingcancausepersonalinjuryandmachinedamage.

•Donotservicethefollowingpartswiththepoweronwhentheyareremovedfromtheirnormaloperating

placesinamachine:

–Powersupplyunits

–Pumps

–Blowersandfans

–Motorgenerators

andsimilarunits.(Thispracticeensurescorrectgroundingoftheunits.)

•Ifanelectricalaccidentoccurs:

–Usecaution;donotbecomeavictimyourself.

–Switchoffpower.

–Sendanotherpersontogetmedicalaid.

4ThinkCentreHardwareMaintenanceManual

Safetyinspectionguide

Theintentofthisinspectionguideistoassistyouinidentifyingpotentiallyunsafeconditionsonthese

products.Eachmachine,asitwasdesignedandbuilt,hadrequiredsafetyitemsinstalledtoprotectusers

andservicepersonnelfrominjury.Thisguideaddressesonlythoseitems.However,goodjudgmentshould

beusedtoidentifypotentialsafetyhazardsduetoattachmentoffeaturesoroptionsnotcoveredbythis

inspectionguide.

Ifanyunsafeconditionsarepresent,youmustdeterminehowserioustheapparenthazardcouldbeand

whetheryoucancontinuewithoutrstcorrectingtheproblem.

Considertheseconditionsandthesafetyhazardstheypresent:

•Electricalhazards,especiallyprimarypower(primaryvoltageontheframecancauseseriousorfatal

electricalshock).

•Explosivehazards,suchasadamagedCRTfaceorbulgingcapacitor

•Mechanicalhazards,suchaslooseormissinghardware

Theguideconsistsofaseriesofstepspresentedinachecklist.Beginthecheckswiththepoweroff,and

thepowercorddisconnected.

Checklist:

1.Checkexteriorcoversfordamage(loose,broken,orsharpedges).

2.Power-offthecomputer.Disconnectthepowercord.

3.Checkthepowercordfor:

a.Athird-wiregroundconnectoringoodcondition.Useametertomeasurethird-wireground

continuityfor0.1ohmorlessbetweentheexternalgroundpinandframeground.

b.Thepowercordshouldbetheappropriatetypeasspeciedinthepartslistings.

c.Insulationmustnotbefrayedorworn.

4.Removethecover.

5.Checkforanyobviousalterations.Usegoodjudgmentastothesafetyofanyalterations.

6.Checkinsidetheunitforanyobviousunsafeconditions,suchasmetallings,contamination,wateror

otherliquids,orsignsofreorsmokedamage.

7.Checkforworn,frayed,orpinchedcables.

8.Checkthatthepower-supplycoverfasteners(screwsorrivets)havenotbeenremovedortamperedwith.

Handlingelectrostaticdischarge-sensitivedevices

Anycomputerpartcontainingtransistorsorintegratedcircuits(ICs)shouldbeconsideredsensitiveto

electrostaticdischarge(ESD).ESDdamagecanoccurwhenthereisadifferenceinchargebetweenobjects.

ProtectagainstESDdamagebyequalizingthechargesothatthemachine,thepart,theworkmat,andthe

personhandlingthepartareallatthesamecharge.

Notes:

1.Useproduct-specicESDprocedureswhentheyexceedtherequirementsnotedhere.

2.MakesurethattheESDprotectivedevicesyouusehavebeencertied(ISO9000)asfullyeffective.

WhenhandlingESD-sensitiveparts:

•Keepthepartsinprotectivepackagesuntiltheyareinsertedintotheproduct.

•Avoidcontactwithotherpeoplewhilehandlingthepart.

Chapter2.Safetyinformation5

•Wearagroundedwriststrapagainstyourskintoeliminatestaticonyourbody.

•Preventthepartfromtouchingyourclothing.Mostclothingisinsulativeandretainsachargeevenwhen

youarewearingawriststrap.

•Usetheblacksideofagroundedworkmattoprovideastatic-freeworksurface.Thematisespecially

usefulwhenhandlingESD-sensitivedevices.

•Selectagroundingsystem,suchasthoselistedbelow,toprovideprotectionthatmeetsthespecic

servicerequirement.

Note:TheuseofagroundingsystemisdesirablebutnotrequiredtoprotectagainstESDdamage.

–AttachtheESDgroundcliptoanyframeground,groundbraid,orgreen-wireground.

–UseanESDcommongroundorreferencepointwhenworkingonadouble-insulatedor

battery-operatedsystem.Youcanusecoaxorconnector-outsideshellsonthesesystems.

–Usetheroundground-prongoftheacplugonac-operatedcomputers.

Groundingrequirements

Electricalgroundingofthecomputerisrequiredforoperatorsafetyandcorrectsystemfunction.Proper

groundingoftheelectricaloutletcanbeveriedbyacertiedelectrician.

Safetynotices(multi-lingualtranslations)

Thecautionanddangersafetynoticesinthissectionareprovidedinthefollowinglanguages:

•English

•Arabic

•Brazilian/Portuguese

•Chinese(simplied)

•Chinese(traditional)

•French

•German

•Hebrew

•Italian

•Korean

•Spanish

DANGER

Electricalcurrentfrompower,telephoneandcommunicationcablesishazardous.

Toavoidashockhazard:

•Donotconnectordisconnectanycablesorperforminstallation,maintenance,orreconguration

ofthisproductduringanelectricalstorm.

•Connectallpowercordstoaproperlywiredandgroundedelectricaloutlet.

6ThinkCentreHardwareMaintenanceManual

•Connecttoproperlywiredoutletsanyequipmentthatwillbeattachedtothisproduct.

•Whenpossible,useonehandonlytoconnectordisconnectsignalcables.

•Neverturnonanyequipmentwhenthereisevidenceofre,water,orstructuraldamage.

•Disconnecttheattachedpowercords,telecommunicationssystems,networks,andmodems

beforeyouopenthedevicecovers,unlessinstructedotherwiseintheinstallationandconguration

procedures.

•Connectanddisconnectcablesasdescribedinthefollowingtableswheninstalling,moving,or

openingcoversonthisproductorattacheddevices.

ToConnectToDisconnect

1.TurneverythingOFF.

2.First,attachallcablestodevices.

3.Attachsignalcablestoconnectors.

4.Attachpowercordstooutlet.

5.TurndeviceON.

1.TurneverythingOFF.

2.First,removepowercordsfromoutlet.

3.Removesignalcablesfromconnectors.

4.Removeallcablesfromdevices.

CAUTION:

Whenreplacingthelithiumbattery,useonlyPartNumber45C1566oranequivalenttypebattery

recommendedbythemanufacturer.Ifyoursystemhasamodulecontainingalithiumbattery,replace

itonlywiththesamemoduletypemadebythesamemanufacturer.Thebatterycontainslithiumand

canexplodeifnotproperlyused,handled,ordisposedof.Donot:

•Throworimmerseintowater

•Heattomorethan100°C(212°F)

•Repairordisassemble

Disposeofthebatteryasrequiredbylocalordinancesorregulations.

CAUTION:

Whenlaserproducts(suchasCD-ROMs,DVD-ROMdrives,beropticdevices,ortransmitters)are

installed,notethefollowing:

•Donotremovethecovers.Removingthecoversofthelaserproductcouldresultinexposureto

hazardouslaserradiation.Therearenoserviceablepartsinsidethedevice.

•Useofcontrolsoradjustmentsorperformanceofproceduresotherthanthosespeciedherein

mightresultinhazardousradiationexposure.

DANGER

SomelaserproductscontainanembeddedClass3AorClass3Blaserdiode.Notethefollowing:

Laserradiationwhenopen.Donotstareintothebeam,donotviewdirectlywithoptical

instruments,andavoiddirectexposuretothebeam.

Chapter2.Safetyinformation7

≥18kg(37lbs)≥32kg(70.5lbs)≥55kg(121.2lbs)

CAUTION:

Usesafepracticeswhenlifting.

CAUTION:

Thepowercontrolbuttononthedeviceandthepowerswitchonthepowersupplydonotturnoff

theelectricalcurrentsuppliedtothedevice.Thedevicealsomighthavemorethanonepower

cord.Toremoveallelectricalcurrentfromthedevice,ensurethatallpowercordsaredisconnected

fromthepowersource.

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8ThinkCentreHardwareMaintenanceManual

Chapter2.Safetyinformation9

≥18kg(37lbs)≥32kg(70.5lbs)≥55kg(121.2lbs)

1

2

PERIGO

Acorrenteelétricaprovenientedecabosdealimentação,detelefoneedecomunicaçõeséperigosa.

10ThinkCentreHardwareMaintenanceManual

Paraevitarriscodechoqueelétrico:

•Nãoconectenemdesconectenenhumcaboouexecuteinstalação,manutençãooureconguração

desteprodutoduranteumatempestadecomraios.

•Conectetodososcabosdealimentaçãoatomadaselétricascorretamenteinstaladaseaterradas.

•Todoequipamentoqueforconectadoaesteprodutodeveserconectadoatomadascorretamente

instaladas.

•Quandopossível,utilizeapenasumadasmãosparaconectaroudesconectarcabosdesinal.

•Nuncaliguenenhumequipamentoquandohouverevidênciadefogo,águaoudanosestruturais.

•Antesdeabrirtampasdedispositivos,desconectecabosdealimentação,sistemasdetelecomunicação,

redesemodemsconectados,amenosqueespecicadodemaneiradiferentenosprocedimentosde

instalaçãoeconguração.

•Conecteedesconecteoscabosconformedescritonatabelaapresentadaaseguiraoinstalar,moverou

abrirtampasdesteprodutooudedispositivosconectados.

ParaConectar:ParaDesconectar:

1.DESLIGUETudo.

2.Primeiramente,conectetodososcabosaos

dispositivos.

3.Conecteoscabosdesinalaosconectores.

4.Conecteoscabosdealimentaçãoàstomadas.

5.LIGUEosdispositivos.

1.DESLIGUETudo.

2.Primeiramente,removaoscabosdealimentaçãodas

tomadas.

3.Removaoscabosdesinaldosconectores.

4.Removatodososcabosdosdispositivos.

CUIDADO:

Aosubstituirabateriadelítio,utilizeapenasumabateriacomNúmerodePeça45C1566ouumtipo

debateriaequivalenterecomendadopeloSeoseusistemapossuiummódulocomumabateriade

lítio,substitua-oapenasporummódulodomesmotipoedomesmofabricante.Abateriacontémlítio

epodeexplodirsenãoforutilizada,manuseadaoudescartadademaneiracorreta.

Não:

•Jogueoucoloquenaágua

•Aqueçaamaisde100°C(212°F)

•Consertenemdesmonte

Descarteabateriaconformerequeridopelasleisouregulamentoslocais.

PRECAUCIÓN:

Quandoprodutosalaser(comounidadesdeCD-ROMs,unidadesdeDVD-ROM,dispositivosdebraótica

outransmissores)estivereminstalados,observeoseguinte:

•Nãoremovaastampas.Aremoçãodastampasdeumprodutoalaserpoderesultaremexposição

prejudicialàradiaçãodelaser.Nãoexistempeçasquepodemserconsertadasnointeriordodispositivo.

Chapter2.Safetyinformation11

•Autilizaçãodecontrolesouajustesouaexecuçãodeprocedimentosdiferentesdosespecicadosaqui

poderesultaremexposiçãoprejudicialàradiação.

PERIGO

AlgunsprodutosalasercontêmdiododelaserintegradodaClasse3AoudaClasse3B.Observeoseguinte:

Radiaçãoalaserquandoaberto.Nãoolhediretamenteparaofeixeaolhonuoucominstrumentosópticose

eviteexposiçãodiretaaofeixe.

≥18kg(37lbs)≥32kg(70.5lbs)≥55kg(121.2lbs)

CUIDADO:

Utilizeprocedimentosdesegurançaparalevantarequipamentos.

CUIDADO:

Obotãodecontroledealimentaçãododispositivoeobotãoparaligar/desligardafontedealimentação

nãodesligamacorrenteelétricafornecidaaodispositivo.Odispositivotambémpodetermaisdeumcabo

dealimentação.Pararemovertodaacorrenteelétricadodispositivo,assegurequetodososcabosde

alimentaçãoestejamdesconectadosdafontedealimentação.

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12ThinkCentreHardwareMaintenanceManual

Chapter2.Safetyinformation13

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