ThinkCentre
UserGuide
MachineTypes:3034,3131,3142,3244,3257,3307,3356,
3557,3692,3853,4394,5092,5226,5296,6667,and6673
3467,
ThinkCentre
UserGuide
MachineTypes:3034,3131,3142,3244,3257,3307,3356,
3557,3692,3853,4394,5092,5226,5296,6667,and6673
3467,
Note
Beforeusingthisinformationandtheproductitsupports,besuretoreadandunderstandtheThinkCentre
SafetyandWarrantyGuideandAppendixA“Notices”onpage49
.
FirstEdition(October2010)
©CopyrightLenovo2010.
LENOVOproducts,data,computersoftware,andserviceshavebeendevelopedexclusivelyatprivateexpenseandare
soldtogovernmentalentitiesascommercialitemsasdenedby48C.F.R.2.101withlimitedandrestrictedrightsto
use,reproductionanddisclosure.
LIMITEDANDRESTRICTEDRIGHTSNOTICE:Ifproducts,data,computersoftware,orservicesaredeliveredpursuant
aGeneralServicesAdministration“GSA ”contract,use,reproduction,ordisclosureissubjecttorestrictionssetforth
inContractNo.GS-35F-05925.
Contents
Importantsafetyinformation.....vii
Chapter1.Productoverview......1
Features..................1
Specications................3
Softwareoverview..............4
SoftwareprovidedbyLenovo........4
AdobeReader..............6
Antivirussoftware.............6
Locations..................6
Locatingconnectorsonthefrontofyour
computer................6
Locatingconnectorsontherearofyour
computer................7
Locatingcomponents...........8
Locatingpartsonthesystemboard.....9
Chapter2.Installingorreplacing
hardware...............11
Handlingstatic-sensitivedevices.......11
Installingorreplacinghardware........11
Installingexternaloptions........11
Openingthecomputercover.......12
Removingandreinstallingthefrontbezel..12
Installingorreplacingamemorymodule...13
Replacingtheharddiskdrive.......14
Replacingtheopticaldrive........16
Replacingthebattery..........17
Replacingtheheatsink.........18
Replacingtheinternalspeaker.......19
ReplacingthefrontaudioandUSB
assembly...............20
Replacingtheacpoweradapter......21
Replacingtheacpoweradapterbracket...22
Replacingthekeyboardormouse.....25
Completingthepartsreplacement.....25
Installingsecurityfeatures..........26
Integratedcablelock..........26
Passwordprotection..........27
Erasinglostorforgottenpasswords(clearing
CMOS)................27
Performingarecoveryoperation......31
UsingtheRescueandRecoveryworkspace...31
Creatingandusingarescuemedium......32
Creatingarescuemedium........32
Usingarescuemedium.........33
Installingorreinstallingdevicedrivers.....33
Solvingrecoveryproblems..........34
Chapter4.UsingtheSetupUtility
program................35
StartingtheSetupUtilityprogram.......35
Viewingandchangingsettings........35
Usingpasswords..............35
Passwordconsiderations.........35
Power-OnPassword..........36
AdministratorPassword.........36
HardDiskPassword...........36
Setting,changing,anddeletingapassword.36
Enablingordisablingadevice........36
Selectingastartupdevice..........37
Selectingatemporarystartupdevice....37
Selectingorchangingthestartupdevice
sequence...............37
ExitingfromtheSetupUtilityprogram.....37
Chapter5.Updatingsystem
programs...............39
Usingsystemprograms...........39
Updating(ashing)theBIOSfromadisc....39
Updating(ashing)theBIOSfromyouroperating
system..................40
RecoveringfromaPOST/BIOSupdatefailure..40
Chapter6.T roubleshootingand
diagnostics..............41
Basictroubleshooting............41
Diagnosticprograms............42
LenovoThinkVantageToolbox.......42
PC-DoctorforRescueandRecovery....43
PC-DoctorforDOS...........43
Cleaninganopticalmouse..........44
Chapter3.Recoveryinformation...29
Creatingandusingrecoverymedia......29
Creatingrecoverymedia.........29
Usingrecoverymedia..........30
Performingbackupandrecoveryoperations...30
Performingabackupoperation......30
©CopyrightLenovo2010
Chapter7.Gettinginformation,help,
andservice..............45
Informationresources............45
OnlineBooksfolder...........45
LenovoThinkVantageTools........45
v
ThinkVantageProductivityCenter.....45
LenovoWelcome............46
AccessHelp..............46
SafetyandWarranty...........46
LenovoWebsite(http://www.lenovo.com)..46
Helpandservice..............47
Usingthedocumentationanddiagnostic
programs...............47
Callingforservice............47
Usingotherservices..........48
Purchasingadditionalservices......48
AppendixA.Notices.........49
Televisionoutputnotice...........50
EuropeanconformanceCEmark.......50
Trademarks................50
Index..................51
viThinkCentreUserGuide
Importantsafetyinformation
CAUTION:
Beforeusingthismanual,besuretoreadandunderstandalltherelatedsafetyinformationforthis
product.RefertotheThinkCentreSafetyandWarrantyGuidethatyoureceivedwiththisproductfor
thelatestsafetyinformation.Readingandunderstandingthissafetyinformationreducestheriskof
personalinjuryandordamagetoyourproduct.
IfyounolongerhaveacopyoftheThinkCentreSafetyandWarrantyGuide,youcanobtainaPortable
DocumentFormat(PDF)versionfromtheLenovo
http://www.lenovo.com/support
®
SupportWebsiteat:
©CopyrightLenovo2010
vii
viiiThinkCentreUserGuide
Chapter1.Productoverview
Thischapterdescribesthecomputerfeatures,specications,preinstalledsoftwareprograms,andpart
andconnectorlocations.
Features
Thissectionprovidesinformationaboutthecomputerfeatures.
Systeminformation
Thefollowinginformationcoversavarietyofmodels.Forinformationaboutyourspecicmodel,usethe
SetupUtilityprogram.SeeChapter4“UsingtheSetupUtilityprogram”onpage35
Microprocessor
Yourcomputercomeswithoneofthefollowingmicroprocessors(internalcachesizevariesbymodeltype):
•Intel
•IntelCorei5microprocessor
•IntelPentium
Memory
•Supportsuptotwodoubledatarate3smalloutlinedualinlinememorymodules(DDR3SODIMMs)
®
Core™i3microprocessor
®
microprocessor
.
Internaldrives
•Opticaldrive
•SerialAdvancedTechnologyAttachment(SATA)harddiskdrive(availableinsomemodels)
Videosubsystem
•IntegratedgraphicscardforaVideoGraphicsArray(VGA)connectorandaDisplayPortconnector
Audiosubsystem
•Integratedhigh-denition(HD)audio
•Audioline-inconnector,audioline-outconnector,andmicrophoneconnectorontherearpanel
•Microphoneconnectorandheadphoneconnectoronthefrontpanel
•Internalspeaker
Connectivity
•100/1000MbpsintegratedEthernetcontroller
•PeripheralComponentInterconnect(PCI)Faxmodem(availableinsomemodels)
Systemmanagementfeatures
•Abilitytostorepower-onself-test(POST)hardwaretestresults
•Automaticpower-onstartup
•DesktopManagementInterface(DMI)
•IntelActiveManagementTechnology(AMT)(availableonsomemodels)
©CopyrightLenovo2010
1
•IntelMatrixStorageManager
•PrebootExecutionEnvironment(PXE)
•SecureManagedClient(SMC)(somemodels)
•SystemManagement(SM)BasicInput/OutputSystem(BIOS)andSMsoftware
•WakeonLAN
•WakeonRing
•WindowsManagementInstrumentation(WMI)
Input/Output(I/O)features
•EightUniversalSerialBus(USB)connectors(twoonthefrontpanelandsixontherearpanel)
•Ethernetconnector
•OneDisplayPortconnector
•One9-pinserialport(optional)
•OnePersonalSystem/2
®
(PS/2
®
)keyboardconnector(optional)
•OnePS/2mouseconnector(optional)
•OneVGAmonitorconnector
•Threeaudioconnectorsontherearpanel(audioline-inconnector,audioline-outconnector,and
microphoneconnector)
•T woaudioconnectorsonthefrontpanel(microphoneconnectorandheadphoneconnector)
Formoreinformation,see“Locatingconnectorsonthefrontofyourcomputer”onpage6
and“Locating
connectorsontherearofyourcomputer”onpage7.
Expansion
•Oneharddiskdrivebay
•Oneopticaldrivebay
•OnePCIcardslot
PowerSupply
•130-wattpoweradapter
•AdvancedCongurationandPowerInterface(ACPI)support
Securityfeatures
•Computrace
•Coverpresenceswitch(alsocalledintrusionswitch)
•Enablingordisablingadevice
•EnablingordisablingUSBconnectorsindividually
•Harddiskdrivepassword
•Keyboardwithngerprintreader(shippedwithsomemodels)
•Power-onpassword(POP),administratorpassword,andharddiskdrivepasswordtodeterunauthorized
useofyourcomputer
•Startupsequencecontrol
•Startupwithoutkeyboardormouse
•Supportforanintegratedcablelock(Kensingtonlock)
2ThinkCentreUserGuide
•T rustedPlatformModule(TPM)
Preinstalledsoftwareprograms
Yourcomputerispreinstalledwithsomesoftwareprogramstohelpyouworkmoreeasilyandsecurely.For
moreinformation,see“Softwareoverview”onpage4
.
Preinstalledoperatingsystem
Yourcomputerispreinstalledwithoneofthefollowingoperatingsystems:
•Microsoft
®
Windows
•MicrosoftWindowsVista
®
7
®
Operatingsystem(s),certiedortestedforcompatibility
•Linux
®
1
Specications
Thissectionliststhephysicalspecicationsforyourcomputer.
(variesbymodeltype)
1.Theoperatingsystem(s)listedherearebeingcertiedortestedforcompatibilityatthetimethispublicationgoesto
press.AdditionaloperatingsystemsmightbeidentiedbyLenovoascompatiblewithyourcomputerfollowingthe
publicationofthismanual.Thislistissubjecttochange.T odetermineifanoperatingsystemhasbeencertiedor
testedforcompatibility,checktheWebsiteoftheoperatingsystemvendor.
Chapter1.Productoverview3
Dimensions
Width:275mm(10.83inches)
Height:79mm(3.11inches)
Depth:238mm(9.37inches)
Weight
Maximumcongurationasshipped:4.18kg(9.22lbs)
Environment
•Airtemperature:
Operating:10°Cto35°C(50°Fto95°F)
Non-operating:-40°Cto60°C(-40°Fto140°F)
Non-operating:-10°Cto60°C(14°Fto140°F)(withoutpackage)
•Humidity:
Operating:20%to80%(non-condensing)
Non-operating:20%to90%(non-condensing)
•Altitude:
Operating:-50to10000ft(-15.2to3048m)
Non-operating:-50to35000ft(-15.2to10668m)
Electricalinput
•Inputvoltage:
–Lowrange:
Minimum:100Vac
Maximum:127Vac
Inputfrequencyrange:50to60Hz
Voltage-selectionswitchsetting:115Vac
–Highrange:
Minimum:200Vac
Maximum:240Vac
Inputfrequencyrange:50to60Hz
Voltage-selectionswitchsetting:230Vac
Softwareoverview
Thissectiondescribesthesoftwarepreinstalledonthecomputersthathaveaninternalharddiskdrive
andanoperatingsystemfromLenovo.
SoftwareprovidedbyLenovo
ThefollowingsoftwareprogramsareprovidedbyLenovotohelpyouimproveproductivityandreducethe
costassociatedwithmaintainingyourcomputer.Softwareprogramsprovidedwithyourcomputermight
varydependingonyourcomputermodeltypeandpreinstalledoperatingsystem.
LenovoThinkVantageT ools
TheLenovoThinkVantage
accesstovarioustoolstohelpyouworkmoreeasilyandsecurely.Formoreinformation,see“Lenovo
ThinkVantageTools”onpage45
4ThinkCentreUserGuide
®
Toolsprogramguidesyoutoahostofinformationsourcesandprovideseasy
.
Note:TheLenovoThinkVantageToolsprogramisonlyavailableoncomputerswiththeWindows7operating
systemfromLenovo.
ThinkVantageProductivityCenter
TheThinkVantageProductivityCenterprogramguidesyoutoahostofinformationandtoolstohelpyouset
up,understand,maintain,andenhanceyourcomputer.
Note:TheThinkVantageProductivityCenterprogramisonlyavailableoncomputerspreinstalledwith
theWindowsVistaoperatingsystemfromLenovo.
LenovoWelcome
TheLenovoWelcomeprogramintroducesyoutosomeinnovativebuilt-infeaturesofLenovoandguidesyou
throughafewimportantsetuptaskstohelpyoumakethemostofyourcomputer.
ThinkVantageRescueandRecovery
TheThinkVantageRescueandRecovery®programisaonebuttonrecoveryandrestoresolutionthat
includesasetofselfrecoverytoolstohelpusersdiagnosecomputerproblems,gethelp,andrecoverfrom
systemcrashesquickly,eveniftheprimaryoperatingsystemwillnotstart.
ThinkVantageClientSecuritySolution
TheThinkVantageClientSecuritySolutionprogramisavailableonselectLenovocomputers.Ithelpsprotect
yourinformation,includingvitalsecurityinformationlikepasswords,encryptionkeys,andelectronic
credentials,whileguardingagainstunauthorizeduseraccesstodata.
Note:TheThinkVantageClientSecuritySolutionprogramisonlyavailableoncomputerspreinstalledwith
theWindowsVistaoperatingsystemfromLenovo.
PasswordManager
ThePasswordManagerprogramhelpsyouautomaticallycaptureandllinauthenticationinformationfor
WindowsapplicationsandWebsites.
Note:ThePasswordManagerprogramisonlyavailableoncomputerspreinstalledwiththeWindows7
operatingsystemfromLenovo.
PowerManager
ThePowerManagerprogramprovidesconvenient,exible,andcompletepowermanagementforyour
ThinkCentre®computer.ByusingthePowerManagerprogram,youcanadjustyourpowersettingsto
achievethebestbalancebetweensystemperformanceandpowersaving.
ProductRecovery
TheProductRecoveryprogramenablesyoutorestorethecontentsoftheharddiskdrivetothefactory
defaultsettings.
FingerprintSoftware
Theintegratedngerprintreaderprovidedonsomekeyboardsenablesyoutoenrollyourngerprintand
associateitwithyourpower-onpassword,harddiskdrivepassword,andWindowspassword.Asaresult,
ngerprintauthenticationcanreplacepasswordsandenablesimpleandsecureuseraccess.Angerprint
readerkeyboardisavailablewithselectcomputersorcanbepurchasedforcomputersthatsupportthis
option.
Chapter1.Productoverview5
LenovoThinkVantageT oolbox
TheLenovoThinkVantageT oolboxprogramhelpsyoumaintainyourcomputer,improvecomputingsecurity,
diagnosecomputerproblems,getfamiliarwiththeinnovativetechnologiesprovidedbyLenovo,andgetmore
informationaboutyourcomputer.See“LenovoThinkVantageToolbox”onpage42
fordetailedinformation.
PC-DoctorforRescueandRecovery
ThePC-DoctorforRescueandRecoverydiagnosticprogramispreinstalledonyourharddiskdrive.Itis
partoftheRescueandRecoveryworkspaceoneachLenovocomputertodiagnosehardwareproblems
andreportoperating-system-controlledsettingsthatcancausehardwarefailures.UsethePC-Doctorfor
RescueandRecoverydiagnosticprogramifyouareunabletostarttheWindowsoperatingsystem.See
“PC-DoctorforRescueandRecovery”onpage43
formoreinformation.
AdobeReader
TheAdobeReaderprogramisatoolusedtoview,print,andsearchPDFdocuments.
See“OnlineBooksfolder”onpage45formoreinformationaboutaccessingtheonlinebooksandthe
LenovoWebsite.
Antivirussoftware
Yourcomputercomeswithantivirussoftwarethatyoucanusetodetectandeliminateviruses.Lenovo
providesafullversionofantivirussoftwareonyourharddiskdrivewithafree30-daysubscription.After30
days,youmustrenewthelicensetocontinuereceivingtheantivirusprogramupdates.
Locations
Locatingconnectorsonthefrontofyourcomputer
Frontconnectorlocationsshowsthelocationsoftheconnectorsonthefrontofyourcomputer.
Figure1.Frontconnectorlocations
6ThinkCentreUserGuide
1USBconnector
2Headphoneconnector
3Microphoneconnector
4USBconnector
Locatingconnectorsontherearofyourcomputer
Rearconnectorlocationsshowsthelocationsoftheconnectorsontherearofyourcomputer.Some
connectorsontherearofyourcomputerarecolor-codedtohelpyoudeterminewheretoconnectthe
cablesonyourcomputer.
Figure2.Rearconnectorlocations
1VGAmonitorconnector8Cover-releasebutton
2USBconnectors(3)9PCIcardslot
3Ethernetconnector10Audioline-outconnector
4Audioline-inconnector11Microphoneconnector
5PS/2keyboardandmouseconnectors
12USBconnectors(3)
(optional)
6Serialport(optional)
7Integratedcablelockslot14acpoweradapterconnector
13DisplayPortconnector
ConnectorDescription
Audioline-inconnector
Usedtoreceiveaudiosignalsfromanexternalaudiodevice,suchasastereo
system.Whenyouattachanexternalaudiodevice,acableisconnectedbetween
theaudioline-outconnectorofthedeviceandtheaudioline-inconnectorofthe
computer.
Audioline-outconnector
Usedtosendaudiosignalsfromthecomputertoexternaldevices,suchas
poweredstereospeakers(speakerswithbuilt-inampliers),headphones,
multimediakeyboards,ortheaudioline-inconnectoronastereosystemorother
externalrecordingdevice.
Chapter1.Productoverview7
ConnectorDescription
DisplayPortconnector
Ethernetconnector
MicrophoneconnectorUsedtoattachamicrophonetoyourcomputerwhenyouwanttorecordsoundor
Serialport(optional)
PS/2keyboardconnector
(optional)
PS/2mouseconnector(optional)Usedtoattachamouse,atrackball,orotherpointingdevicesthatuseaPS/2
USBconnectorUsedtoattachadevicethatrequiresaUSBconnector,suchasaUSBkeyboard,
VGAmonitorconnectorUsedtoattachaVGAmonitororotherdevicesthatuseaVGAmonitorconnector.
Usedtoattachahigh-performancemonitor ,adirect-drivemonitor,orother
devicesthatuseaDisplayPortconnector.
UsedtoattachanEthernetcableforalocalareanetwork(LAN).
Note:TooperatethecomputerwithinFCCClassBlimits,useaCategory5
Ethernetcable.
ifyouusespeech-recognitionsoftware.
Usedtoattachanexternalmodem,aserialprinter,orotherdevicesthatusea
9-pinserialport.
UsedtoattachakeyboardthatusesaPS/2keyboardconnector.
mouseconnector.
aUSBmouse,aUSBscanneroraUSBprinter.IfyouhavemorethaneightUSB
devices,youcanpurchaseaUSBhub,whichyoucanusetoconnectadditional
USBdevices.
Locatingcomponents
Figure3“Componentlocations”onpage8showsthelocationsofthevariouscomponentsinyourcomputer.
Toopenthecomputercover,see“Openingthecomputercover”onpage12
.
Figure3.Componentlocations
1Opticaldrive
2Frontbezel6Memorymodule
8ThinkCentreUserGuide
5Heatsink
3Harddiskdrive(installedinsomemodels)
4Systemfanassembly
7Battery
8Internalspeaker
Locatingpartsonthesystemboard
Figure4“Systemboardpartlocations”onpage9showsthelocationsofthepartsonthesystemboard.
Figure4.Systemboardpartlocations
1Thermalsensorconnector
2Memoryslots(2)11FrontUSBconnector2
3Battery
10PCIcardslot
12Coverpresenceswitchconnector(Intrusionswitch
connector)
4Systemfanconnector13FrontUSB,frontpanel,andfrontaudioconnector
5Internalspeakerconnector
6Serial(COM)connector
7SA TAconnector2andeSAT Aconnector
8PS/2keyboardandmouseconnector
9ClearCMOS(ComplementaryMetalOxide
14SA TAconnector1
15Microprocessorfanconnector
164-pinpowerconnector
17Microprocessor
Semiconductor)/Recoveryjumper
Chapter1.Productoverview9
10ThinkCentreUserGuide
Chapter2.Installingorreplacinghardware
Thischapterprovidesinstructionsonhowtoinstallorreplacehardwareforyourcomputer.
Handlingstatic-sensitivedevices
Donotopenthestatic-protectivepackagecontainingthenewpartuntilthedefectiveparthasbeenremoved
fromthecomputerandyouarereadytoinstallthenewpart.Staticelectricity,althoughharmlesstoyou,can
seriouslydamagecomputercomponentsandparts.
Whenyouhandlepartsandothercomputercomponents,taketheseprecautionstoavoidstatic-electricity
damage:
•Limityourmovement.Movementcancausestaticelectricitytobuilduparoundyou.
•Alwayshandlepartsandothercomputercomponentscarefully.HandlePCIcards,memorymodules,
systemboards,andmicroprocessorsbytheedges.Nevertouchanyexposedcircuitry.
•Preventothersfromtouchingthepartsandothercomputercomponents.
•Beforeyoureplaceanewpart,touchthestatic-protectivepackagecontainingtheparttoametal
expansion-slotcoverorotherunpaintedmetalsurfaceonthecomputerforatleasttwoseconds.This
reducesstaticelectricityinthepackageandyourbody.
•Whenpossible,removethenewpartfromthestatic-protectivepackaging,andinstallitdirectlyinthe
computerwithoutsettingthepartdown.Whenthisisnotpossible,placethestatic-protectivepackage
thatthepartcameinonasmooth,levelsurfaceandplacethepartonit.
•Donotplacethepartonthecomputercoverorothermetalsurface.
Installingorreplacinghardware
Thissectionprovidesinstructionsonhowtoinstallorreplacehardwareforyourcomputer.Youcanexpand
thecapabilitiesofyourcomputerandmaintainyourcomputerbyinstallingorreplacinghardware.
Attention:
Donotopenyourcomputerorattemptanyrepairbeforereadingandunderstandingthe“Importantsafetyinformation”
intheThinkCentreSafetyandWarrantyGuidethatcamewithyourcomputer.T oobtainacopyoftheThinkCentre
SafetyandWarrantyGuide,goto:
http://www.lenovo.com/support
Notes:
1.UseonlycomputerpartsprovidedbyLenovo.
2.Wheninstallingorreplacinganoption,usetheappropriateinstructionsinthissectionalongwiththe
instructionsthatcomewiththeoption.
Installingexternaloptions
Youcanconnectexternaloptionstoyourcomputer,suchasexternalspeakers,aprinter,orascanner.For
someexternaloptions,youmustinstalladditionalsoftwareinadditiontomakingthephysicalconnection.
Wheninstallinganexternaloption,see“Locatingconnectorsonthefrontofyourcomputer”onpage6and
“Locatingconnectorsontherearofyourcomputer”onpage7
usetheinstructionsthatcomewiththeoptiontohelpyoumaketheconnectionandinstallanysoftware
ordevicedriversthatarerequiredfortheoption.
toidentifytherequiredconnector.Then,
©CopyrightLenovo2010
11
Openingthecomputercover
Attention:
Donotopenyourcomputerorattemptanyrepairbeforereadingandunderstandingthe“Importantsafetyinformation”
intheThinkCentreSafetyandWarrantyGuidethatcamewithyourcomputer.T oobtainacopyoftheThinkCentre
SafetyandWarrantyGuide,goto:
http://www.lenovo.com/support
Thissectionprovidesinstructionsonhowtoopenthecomputercover.
CAUTION:
Turnoffthecomputerandwaitthreetoveminutestoletthecomputercoolbefore
openingthecomputercover.
Toopenthecomputercover,dothefollowing:
1.Removeallmediafromthedrives.Then,turnoffallattacheddevicesandthecomputer.
2.Disconnectallpowercordsfromelectricaloutlets.
3.Disconnectthepowercords,Input/Outputcables,andanyothercablesthatareconnectedtothe
computer.See“Locatingconnectorsonthefrontofyourcomputer”onpage6and“Locatingconnectors
ontherearofyourcomputer”onpage7
4.Removeanylockingdevicethatsecuresthecomputercover,suchasanintegratedcablelock.See
“Integratedcablelock”onpage26.
5.Carefullyliftandpositionthecomputerupsidedownasshownin.
6.Pivotthecover-releasebutton1ontherearofthecomputerandthenopenthecomputercoverasshown.
.
Figure5.Openingthecomputercover
Removingandreinstallingthefrontbezel
Attention:
Donotopenyourcomputerorattemptanyrepairbeforereadingandunderstandingthe“Importantsafetyinformation”
intheThinkCentreSafetyandWarrantyGuidethatcamewithyourcomputer.T oobtainacopyoftheThinkCentre
SafetyandWarrantyGuide,goto:
http://www.lenovo.com/support
Thissectionprovidesinstructionsonhowtoremoveandreinstallthefrontbezel.
12ThinkCentreUserGuide