Lenovo ThinkPad L412 Hardware Maintenance Manual

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Lenovo ThinkPad L412 Laptop PDF Hardware maintenance manual

  • Model: ThinkPad L412
  • Brand: Lenovo
  • Type: Hardware maintenance manual
  • Category: Laptop
  • File Size:
  • No. of pages: 167
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1 Page 1 of Lenovo ThinkPad L412 Hardware maintenance manual

ThinkPad L412 HardwareMaintenanceManual ThinkPadL412andL512 (...)

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Lenovo ThinkPad L412 Laptop Manual Note Beforeusingthisinformationandtheproductitsupports,besuretoreadthegeneralinformationunder Notices. FifthEdition(April2012) ©CopyrightLenovo2011,2012. LIMITEDANDRESTRICTEDRIGHTSNOTICE:IfdataorsoftwareisdeliveredpursuantaGeneralServicesAdministration “GSA”contract,use,reproduction,ordisclosureissubjecttorestrictionssetforthinContractNo.GS-35F-05925. (...)

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Lenovo ThinkPad L412 Hardware maintenance manual Contents Aboutthismanual...........iii Chapter1.Safetyinformation......1 Generalsafety................1 Electricalsafety...............2 Safetyinspectionguide............3 Handlingdevicesthataresensitivetoelectrostatic discharge..................3 Groundingrequirements............4 Safetynotices(multilingualtranslations)......4 Lasercompliancestatement(multilingual translations)................17 Chapter2.Importantservice information... (...)

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Lenovo ThinkPad L412 Laptop Manual 1180LCDunit...............85 1190Topshieldingassembly.........89 1200Systemboardassembly.........91 1210USBconnectorboardandUSBcable assembly.................96 1220DC-incableandbasecover.......98 2010LCDfrontbezel............102 2020Speakerassembly...........103 2030Integratedcamera...........104 2040Antennaassembly...........104 2050Hinges,LCDpanel,LCDcable,andLCDrear coverassembly..............106 Chapter9.Locations........111 Frontv (...)

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Lenovo ThinkPad L412 Manual Aboutthismanual ThismanualcontainsserviceandreferenceinformationforthefollowingThinkPad ® Notebookproducts. ThinkPadL412MT0530,0553,0585,0591,4403,and4404 ThinkPadL512MT2550,2597,2598,2599,4444,and4447 Usethismanualalongwiththeadvanceddiagnosticteststotroubleshootproblems. Important: ThismanualisintendedonlyfortrainedservicetechnicianswhoarefamiliarwithThinkPadNotebook products.Usethismanualalongwiththeadvanceddiagnosticteststotroubles (...)

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ThinkPad L412 ivHardwareMaintenanceManual (...)

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Lenovo ThinkPad L412 Manual Chapter1.Safetyinformation Thischapterpresentsfollowingsafetyinformationthatyouneedtobefamiliarwithbeforeyouservice aThinkPadNotebook. •Generalsafety •Electricalsafety •Safetyinspectionguide •Handlingdevicesthataresensitivetoelectrostaticdischarge •Groundingrequirements •Safetynotices(multilingualtranslations) •Lasercompliancestatement(multilingualtranslations) Generalsafety Followtheserulestoensuregeneralsafety: •Observ (...)

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Lenovo ThinkPad L412 Manual Electricalsafety Observethefollowingruleswhenworkingonelectricalequipment. Important: Useonlyapprovedtoolsandtestequipment.Somehandtoolshavehandlescoveredwithasoftmaterial thatdoesnotinsulateyouwhenworkingwithliveelectricalcurrents. Manycustomershave,neartheirequipment,rubberoormatsthatcontainsmallconductivebersto decreaseelectrostaticdischarges.Donotusethistypeofmattoprotectyourselffromelectricalshock. •Findtheroomemergencypowe (...)

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Lenovo ThinkPad L412 Laptop Manual Thispracticeensurescorrectgroundingoftheunits. •Ifanelectricalaccidentoccurs: –Usecaution;donotbecomeavictimyourself. –Switchoffpower. –Sendanotherpersontogetmedicalaid. Safetyinspectionguide Thepurposeofthisinspectionguideistoassistyouinidentifyingpotentiallyunsafeconditions.Aseach machinewasdesignedandbuilt,requiredsafetyitemswereinstalledtoprotectusersandservicetechnicians frominjury.Thisguideaddressesonlythoseitems.Y oushoul (...)

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Lenovo ThinkPad L412 Hardware maintenance manual Notes: 1.Useproduct-specicESDprocedureswhentheyexceedtherequirementsnotedhere. 2.MakesurethattheESDprotectivedevicesyouusehavebeencertied(ISO9000)asfullyeffective. WhenhandlingESD-sensitiveparts: •Keepthepartsinprotectivepackagesuntiltheyareinsertedintotheproduct. •Avoidcontactwithotherpeople. •Wearagroundedwriststrapagainstyourskintoeliminatestaticonyourbody. •Preventthepartfromtouchingyourclothing.Mostclothingisinsulativ (...)

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ThinkPad L412 BeforethecomputerispoweredonafterFRUreplacement,makesureallscrews,springs,andothersmall partsareinplaceandarenotleftlooseinsidethecomputer.Verifythisbyshakingthecomputerandlistening forrattlingsounds.Metallicpartsormetalakescancauseelectricalshorts. DANGER Somestandbybatteriescontainasmallamountofnickelandcadmium.Donotdisassembleastandbybattery, rechargeit,throwitintoreorwater,orshort-circuitit.Disposeofthebatteryasrequiredbylocal (...)

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Lenovo ThinkPad L412 Manual Thoughthemainbatterieshavelowvoltage,ashortedorgroundedbatterycanproduceenoughcurrentto burnpersonnelorcombustiblematerials. DANGER UnlesshotswapisallowedfortheFRUbeingreplaced,doasfollowsbeforeremovingit:poweroffthe computer,unplugallpowercordsfromelectricaloutlets,removethebatterypack,anddisconnectany interconnectingcables. 6HardwareMaintenanceManual (...)

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Lenovo ThinkPad L412 Hardware maintenance manual PERIGO AntesdeligarocomputadorapósasubstituiçãodaFRU,certique-sedequetodososparafusos,molase outraspeçaspequenasestejamnolugarenãoestejamsoltosdentrodocomputador.Veriqueissosacudindo ocomputadoreprocurandoouvirsonsdepeçassoltas.Peçasmetálicasoulascasdemetalpodemcausar curto-circuito. PERIGO Algumasbateriasreservacontêmumapequenaquantidadedeníquelecádmio.Nãodesmonteumabateria reserva,recarregue-a,jogue-anofogoounaágua, (...)

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ThinkPad L412 Opacotedabateriacontémumapequenaquantidadedeníquel.Nãoodesmonte,jogue-onofogoouna água,oudeixe-oentraremcurto-circuito.Descarteopacotedabateriaconformerequeridopelasleisou regulamentoslocais.Usesomenteabaterianasparteslistadasapropriadasaosubstituiropacotedabateria. Ousodeumabateriaincorretapoderesultaremcombustãoouexplosãodabateria. PERIGO Abateriadelítiopodecausarincêndio,explosãoougravesqueimaduras.Nãoarecarregue,removaseu (...)

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Lenovo ThinkPad L412 Manual Avantderemettrel'ordinateursoustensionaprèsremplacementd'uneunitéenclientèle,vériezquetousles ressorts,visetautrespiècessontbienenplaceetbienxées.Pourcefaire,secouezl'unitéetassurez-vous qu'aucunbruitsuspectneseproduit.Despiècesmétalliquesoudescopeauxdemétalpourraientcauser uncourt-circuit. DANGER Certainesbatteriesdesecourscontiennentdunickeletducadmium.Nelesdémontezpas,nelesrechargez pas,nelesexpos (...)

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Lenovo ThinkPad L412 Hardware maintenance manual DANGER Bienquelevoltagedesbatteriesprincipalessoitpeuélevé,lecourt-circuitoulamiseàlamassed'une batteriepeutproduiresufsammentdecourantpourbrûlerdesmatériauxcombustiblesoucauserdes brûlurescorporellesgraves. DANGER Sileremplacementàchaudn'estpasautorisépourl'unitéremplaçablesursitequevousremplacez, procédezcommesuitavantderetirerl'unité:mettezl'ordinateurhorstension,débrancheztousles cordonsd&apo (...)

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Lenovo ThinkPad L412 Laptop Manual DieSystembatterieisteineLithiumbatterie.Siekannsichentzünden,explodierenoderschwereVerbrennungen hervorrufen.BatteriendiesesTypsdürfennichtaufgeladen,zerlegt,über100°Cerhitztoderverbranntwerden. AuchdarfihrInhaltnichtmitWasserinVerbindunggebrachtoderderzurrichtigenPolungangebrachte Verbindungssteckerentferntwerden.BeiderEntsorgungdieörtlichenBestimmungenfürSondermüll beachten.BeimErsetzenderBatterienurBatteriendesTypsverwenden,de (...)

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Lenovo ThinkPad L412 Manual 12HardwareMaintenanceManual (...)

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Lenovo ThinkPad L412 Hardware maintenance manual Chapter1.Safetyinformation13 (...)

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Lenovo ThinkPad L412 Hardware maintenance manual AntesdeencenderelsistemadespuesdesustituirunaFRU,compruebequetodoslostornillos,muellesy demáspiezaspequeñasseencuentranensusitioynoseencuentransueltasdentrodelsistema.Compruébelo agitandoelsistemayescuchandolosposiblesruidosqueprovocarían.Laspiezasmetálicaspuedencausar cortocircuitoseléctricos. Algunasbateríasdereservacontienenunapequeñacantidaddeníquelycadmio.Nolasdesmonte,ni recargue,nilasechealfuegooalaguanilascortocircuite. (...)

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Lenovo ThinkPad L412 Hardware maintenance manual Salvoquesepermitaelintercambioencalienteparalaunidadsustituiblelocalmente,realicelosiguienteantes deextraerla:apagueelsistema,desconectetodosloscablesdealimentacióndelastomasdealimentación eléctrica,extraigalabateríaydesconecteloscablesdeinterconexión. 16HardwareMaintenanceManual (...)

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Lenovo ThinkPad L412 Laptop Manual Lasercompliancestatement(multilingualtranslations) Thelasercompliancestatementsinthissectionareprovidedinthefollowinglanguages: •English •Arabic •BrazilianPortuguese •French •German •Hebrew •Japanese •Korean •Spanish •TraditionalChinese Chapter1.Safetyinformation17 (...)

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ThinkPad L412 Chapter1.Safetyinformation19 (...)

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Lenovo ThinkPad L412 Manual Chapter1.Safetyinformation21 (...)

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Lenovo ThinkPad L412 Laptop Manual Chapter2.Importantserviceinformation Thischapterpresentsfollowingimportantserviceinformationthatappliestoallmachinetypessupportedby thismanual: •StrategyforreplacingFRUs –Strategyforreplacingaharddiskdrive –Importantnoticeforreplacingasystemboard –Howtouseerrormessage •StrategyforreplacingFRUsforCTO,CMV,andGAV –Productdenition –FRUidenticationforCTO,CMV,andGAVproducts Important: •AdvisecustomerstocontacttheLenovoCu (...)

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ThinkPad L412 Strategyforreplacingaharddiskdrive Alwaystrytorunalow-levelformatbeforereplacingaharddiskdrive.Thiswillcauseallcustomerdataon theharddisktobelost.Besurethatthecustomerhasacurrentbackupofthedatabeforedoingthistask. Attention:Thedrivestartupsequenceinthecomputeryouareservicingmayhavebeenchanged.Be extremelycarefulduringwriteoperationssuchascopying,saving,orformatting.Ifyouselectanincorrect drive,dataorprogramscanbeoverwritten. Importantno (...)

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Lenovo ThinkPad L412 Hardware maintenance manual GeneralAnnounceVariant(GAV) Thisisastandardmodel(xedconguration).GAVsareannouncedandofferedtoallcustomers.TheMTM portionofthemachinelabelisa4-digitMTand3-digitmodel,wheremodel=a“xedpartnumber”,not “CTO”(Example:1829-F1U).Also,PEW,eSupport,andtheHMMwilllisttheseproductsunderthesame xedmodelnumber. FRUidenticationforCTO,CMV,andGAVproducts TherearethreeinformationresourcestoidentifywhichFRUsareusedtosupportCTO,CMV,an (...)

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Lenovo ThinkPad L412 Hardware maintenance manual Chapter3.Generalcheckout Thischapterpresentsfollowinginformation: •Whattodorst •Checkoutguide –SystemsupportingtheLenovoThinkVantageToolboxprogramandthePC-DoctorforDOSdiagnostics program –SystemsupportingtheLenovodiagnosticsprograms •Powersystemcheckout ThedescriptionsinthischapterapplytoanyThinkPadmodelthatsupportsthePC-Doctor ® forDOS diagnosticsprogram.Somedescriptionsmightnotapplytoyourparticularcomputer. Beforeyougoto (...)

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ThinkPad L412 Beforecheckingproblemswiththecomputer,determinewhetherthedamageiscoveredunderthewarranty byreferringtothefollowinglist: Thefollowingarenotcoveredunderwarranty: •LCDpanelcrackedfromtheapplicationofexcessiveforceorfrombeingdropped •Scratched(cosmetic)parts •Distortion,deformation,ordiscolorationofthecosmeticparts •Plasticparts,latches,pins,orconnectorsthathavebeencrackedorbrokenbyexcessiveforce •Damagecausedbyliquidspilledintoth (...)

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Lenovo ThinkPad L412 Manual 1.Turnonthecomputer. 2.WhentheThinkPadlogocomesup,immediatelypressF1toentertheBIOSSetupUtility. Note:Ifasupervisorpasswordhasbeensetbythecustomer,BIOSSetupUtilitymenuappearsafterthe passwordisentered.YoucanstartBIOSSetupUtilitybypressingEnterinsteadofenteringthesupervisor password;however,youcannotchangetheparametersthatareprotectedbythesupervisorpassword. OntheBIOSSetupUtilityscreen,pressF9,Enter,F10,andthenEnter. Note:Whenyouinitializ (...)

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Lenovo ThinkPad L412 Hardware maintenance manual Diagnostics Run Normal Test Run Quick Test CPU/Coprocessor Systemboard Video Adapter Fixed Disks Diskette Drives Other Devices Communication Advanced Memory Tests Interactive Tests Hardware Info Utility Quit F1=Help PC-DOCTOR 2.0 Copyright 2008 PC-Doctor, Inc. All Rights Reserved. Use the cursor keys and ESC to move in menus. Press ENTER to select. Wireless LAN Theoptionsonthetestmenuareasfollows: DiagnosticsInteractiveTests •RunNor (...)

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Lenovo ThinkPad L412 Laptop Manual HardwareInfo •SystemConguration •MemoryContents •PhysicalDiskDrives •LogicalDiskDrives •VGAInformation •IDEDriveInfo •PCIInformation •PNPISAInfo •SMBIOSInfo •VESALCDInfo •HardwareEventsLog Utility•RunExternalTests •SurfaceScanHardDisk •BenchmarkSystem •DOSShell •TechSupportForm •BatteryRundown •ViewTestLog •PrintLog •SaveLog •FullEraseHardDrive •QuickEraseHardDrive LenovoThinkVantageToolbox (...)

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Lenovo ThinkPad L412 Manual Torunthetest,click“RunDiagnostics”ontheRescueandRecoverymainscreen. FRUtests ThefollowingtableshowsthetestforeachFRU. Table1.FRUtests FRUApplicabletest Systemboard1.Diagnostics➙CPU/Coprocessor 2.Diagnostics➙Systemboard 3.IfthedockingstationortheportreplicatorisattachedtotheThinkPadNotebook, detachit. Power Diagnostics➙ThinkPadDevices➙acpoweradapter,Battery1(Battery2) LCDunit 1.Diagnostics➙VideoAdapter 2.InteractiveT ests (...)

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Lenovo ThinkPad L412 Hardware maintenance manual Table1.FRUtests(continued) FRUApplicabletest TrackPointorpointing device IftheTrackPointdoesnotwork,checkthecongurationasspeciedintheBIOSSetup Utility.IftheT rackPointisdisabled,selectAutomatictoenableit. AfteryouusetheTrackPoint,thepointermaydriftonthescreenforashorttime.This driftcanoccurwhenaslight,steadypressureisappliedtotheTrackPointpointer. Thissymptomisnotahardwareproblem.Ifthepointerstopsafterashorttime,no serviceactionis (...)

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Lenovo ThinkPad L412 Hardware maintenance manual Todownloadandinstallaquicktestprogram,gotohttp://www.lenovo.com/diags,andfollowtheinstructions ontheWebsite. Torunaquicktestusingthedownloadedprogram,dothefollowing: 1.GototheC:\SWTOOLS\ldiagfolder. 2.Double-clickthegui_lsc_lite.exele. 3.WhentheUserAccountControlwindowopens,clickYes. 4.Selectthedeviceclasstobetested. 5.Selectthedevicestobetested. 6.Selecttheteststobeperformed. 7.Followtheinstructionsonthescreentostartthetest.Whenapro (...)

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Lenovo ThinkPad L412 Laptop Manual •IfyouhavecreatedthebootablediagnosticmediumonaUSBdevice,dothefollowing: 1.AttachtheUSBdevicetothecomputer. 2.Turnonthecomputer.Ifthecomputercannotbeturnedon,gotoPowersystemcheckout,and checkthepowersources.Ifanerrorcodeisdisplayed,gotoSymptom-to-FRUindexforerror codedescriptionsandtroubleshootinghints. 3.WhentheThinkPadlogoisdisplayed,repeatedlypressandreleasetheF12key.WhentheBoot Menuwindowopens,releasetheF12key. 4.Usethearrowkeysto (...)

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Lenovo ThinkPad L412 Hardware maintenance manual 2.Measuretheoutputvoltageattheplugoftheacadaptercable.Seethefollowinggure: Pin Voltage(Vdc) 1+20 20 3 Ground 1 2 3 (20V) Note:Outputvoltageofpinno.2oftheacadaptermaydifferentfromtheoneyouareservicing. 3.Ifthevoltageisnotcorrect,replacetheacadapter. 4.Ifthevoltageisacceptable,dothefollowing: •Replacethesystemboard. •Iftheproblempersists,gotoFRUtests. Note:Noisefromtheacadapterdoesnotalwaysindicateadefect. Checkingoperationalchar (...)

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Lenovo ThinkPad L412 Laptop Manual Terminal Voltage(Vdc) 1+0to+16.8 7 Ground(-) 1(+) 2(+) 3 4 5 6(-) 7(-) 3.Ifthevoltageislessthan+11.0Vdc,thebatterypackhasbeendischarged. Note:Rechargingwilltakeatleast3hours,eveniftheindicatordoesnotturnon. Ifthevoltageisstilllessthan+11.0Vdcafterrecharging,replacethebattery. 4.Ifthevoltageismorethan+11.0Vdc,measuretheresistancebetweenbatteryterminals5and7. Theresistancemustbe4to30KΩ.Iftheresistanceisnotcorrect,replacethebatterypack. (...)

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Lenovo ThinkPad L412 Manual 38HardwareMaintenanceManual (...)

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Lenovo ThinkPad L412 Manual Chapter4.Relatedserviceinformation Thischapterpresentsfollowinginformation: •RestoringthefactorycontentsbyusingRecoveryDiscSet •Passwords •Powermanagement •Symptom-to-FRUindex ServiceWebsite: Whenthelatestmaintenancedisketteandthesystemprogramservicediskettebecomeavailable,theywill bepostedonhttp://www.lenovo.com/suppport. RestoringthefactorycontentsbyusingRecoveryDiscSet Whentheharddiskdriveisreplacedbecauseofafailure,noproduct (...)

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Lenovo ThinkPad L412 Laptop Manual c.SelecttheCD/DVDdriveasthe1stBootDevice. 2.InserttheOperatingSystemRecoveryDiscintotheDVDdrive. 3.PressF10tosavetheBIOSSetupUtilitycongurationchanges.Followtheinstructionsonthescreento begintherecoveryprocess. 4.SelectyourlanguageandclickNext. 5.Readthelicense.Ifyouagreewiththetermsandconditions,selectIacceptthesetermsand conditionsandthenclickNext.Ifyoudonotagreewiththetermsandconditions,followthe instructionsonthescreen. 6.ClickYe (...)

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Lenovo ThinkPad L412 Hardware maintenance manual Note:TherearetwomodesfortheHDP:UseronlyandMaster+User.TheMaster+Usermoderequires twoHDPs;thesystemadministratorentersbothinthesameoperation.Thesystemadministratorthen providestheuserHDPtothesystemuser. Attention:IftheuserHDPhasbeenforgotten,checkwhetheramasterHDPhasbeenset.Ifithas,itcanbe usedforaccesstotheharddiskdrive.IfnomasterHDPisavailable,neitherLenovonorLenovoauthorized servicetechniciansprovideanyservicestoreseteithertheuserorth (...)

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Lenovo ThinkPad L412 Laptop Manual servicestoresettheuserHDPsortorecoverdatafromtheharddiskdrive.Theharddiskdrivecanbe replacedforascheduledfee. ToremoveauserHDPthathasbeenforgotten,whentheSVPandthemasterHDPareknown,dothe following: 1.Turnonthecomputer. 2.WhentheThinkPadlogocomesup,immediatelypressF1toenterBIOSSetupUtility.Formodels supportingthePassphrasefunction,pressF1whileHDPiconisappearingonthescreen;thenenterthe masterHDP .Fortheothermodels,enterthemasterHDP . Note (...)

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Lenovo ThinkPad L412 Laptop Manual Incertaincircumstances,thecomputergoesintosleep(standby)modeautomatically: •Ifa“suspendtime”hasbeensetonthetimer,andtheuserdoesnotdoanyoperationwiththekeyboard, theTrackPoint,theharddisk,theparallelconnector,orthediskettedrivewithinthattime. •Ifthebatteryindicatorblinksorange,indicatingthatthebatterypowerislow. Note:Evenifyoudonotsetthelow-batteryalarm,thechargeindicatornotiesyouwhenthebatteryislow, andthenthecomputerentersth (...)

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Lenovo ThinkPad L412 Laptop Manual Symptom-to-FRUindex Thissectioncontainsfollowinginformation: •Numericerrorcodes •Errormessages •No-beepsymptoms •LCD-relatedsymptoms •Intermittentproblems •Undeterminedproblems Thesymptom-to-FRUindexinthissectionlistssymptomsanderrorsandtheirpossiblecauses.Themost likelycauseislistedrst,inboldfacetype. Note:DotheFRUreplacementorotheractionsinthesequenceshowninthecolumnheaded“FRUor action,insequence.”IfreplacingaFRUdoe (...)

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ThinkPad L412 Table2.Numericerrorcodes(continued) Symptomorerror(beeps,ifany) FRUoraction,insequence 0230 ShadowRAMerror-ShadowRAMfailsatoffsetnnnn. (twoshortbeeps) Systemboard. 0231 SystemRAMerror-SystemRAMfailsatoffsetnnnn. (twoshortbeeps) 1.DIMM. 2.Systemboard. 0232 ExtendedRAMerror-ExtendedRAMfailsatoffsetnnnn. (twoshortbeeps) 1.DIMM. 2.Systemboard. 0250 Systembatteryerror-Systembatteryisdead. (twoshortbeeps) 1.Chargethebackupbatteryformorethan8h (...)

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Lenovo ThinkPad L412 Manual Table2.Numericerrorcodes(continued) Symptomorerror(beeps,ifany) FRUoraction,insequence 02F7 Fail-safetimerNMIfailed (twoshortbeeps) 1.DIMM. 2.Systemboard. 1802 Unauthorizednetworkcardispluggedin-Turnoffand removetheminiPCInetworkcard. (twoshortbeeps) 1.RemoveMiniPCInetworkcard. 2.Systemboard. Errormessages Table3.Errormessages Symptomorerror(beeps,ifany) FRUoraction,insequence BadCRC2.EnterBIOSSetupUtility,andloadSetup defaults. (twosho (...)

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ThinkPad L412 Table4.No-beepsymptoms(continued) Symptomorerror FRUoraction,insequence Thepower-onpasswordpromptappears.Apower-onpasswordorasupervisorpasswordisset. TypethepasswordandpressEnter. Thehard-diskpasswordpromptappears.Ahard-diskpasswordisset.Typethepasswordand pressEnter. LCD-relatedsymptoms Important:TheTFTLCDforthenotebookcomputercontainsmanythin-lmtransistors(TFTs).The presenceofasmallnumberofdotsthataremissing,discolored,oralwaysligh (...)

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Lenovo ThinkPad L412 Laptop Manual Undeterminedproblems Ifthediagnostictestsdidnotidentifytheadapterordevicethathasfailed,ifwrongdevicesareinstalled, orifthesystemsimplyisnotoperating,followtheseprocedurestoisolatethefailingFRU(donotisolate FRUsthathavenodefects). Verifythatallattacheddevicesaresupportedbythecomputer. Verifythatthepowersupplybeingusedatthetimeofthefailureisoperatingcorrectly.(SeePowersystem checkout.) 1.Turnoffthecomputer. 2.VisuallycheckeachFRUfordamage (...)

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ThinkPad L412 Chapter5.Statusindicators Thischapterpresentsthesystemstatusindicatorsthatshowthestatusofthecomputer. 2 1 3 4 5 6 7 8 Table6.Statusindicators IndicatorMeaning 1 Numericlock Bydefault,whenthenumericlockison,theindicatorisdisplayedonthescreen. 2 Poweron Green: Thecomputerisonandreadytouse. Thepowerswitchstayslitwheneverthe computerisonandisnotlitwhenthe computerisinsleep(standby)mode. 3 Wireless LAN/WAN/WiMAX status Green:Thewirelessfea (...)

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ThinkPad L412 Table6.Statusindicators(continued) IndicatorMeaning 5 Deviceaccess Dataisbeingreadfromorwrittentotheharddiskdrive.Whenthisindicatorison,do notputthecomputerintosleep(standby)modeorturnoffthecomputer. Note:Donotmovethecomputerwhilethisindicatorison.Suddenphysicalshock couldcausedriveerrors. 6 CapslockCapsLockmodeisenabled. 7 Sleep(Standby) status Green:Thecomputerisinsleep(standby)mode. Blinkinggreen: Thecomputerisenteringsleep(standby) (...)

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Lenovo ThinkPad L412 Hardware maintenance manual Chapter6.Fnkeycombinations ThefollowingtableshowsthefunctionofeachcombinationofFnwithafunctionkey. Table7.Fnkeycombinations KeycombinationDescription Fn+F1Reserved. Fn+F2Lockthecomputer. Fn+F3 Selectapowerplan(inWindowsXP ,powerscheme)thathasbeencreatedbyPowerManager, oradjustthepowerlevelbyusingtheslidercontrol.Whenyoupressthiscombination,a panelforselectingapowerplan(powerscheme)appears. Notes: 1.TousetheFn+F3keycombination,youmusthav (...)

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ThinkPad L412 Table7.Fnkeycombinations(continued) KeycombinationDescription Applyapresentationschemedirectly,withnoneedtostartPresentationDirector. TodisablethisfunctionandusetheFn+F7keycombinationforswitchingadisplayoutput location,startPresentationDirector,andchangethesettings. Note:Ifthecomputerisawindows7model,itdoesnotsupportpresentationschemes,but theFn+F7combinationisavailableforswitchingadisplayoutputlocation. Fn+F7 ForWindows7: Switchadispla (...)

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Lenovo ThinkPad L412 Manual Table7.Fnkeycombinations(continued) KeycombinationDescription Fn+Pause HasthesamefunctionastheBreakkey. Fn+cursorkeys ThesekeycombinationsworkwithWindowsMediaPlayer.Fn+downarrowkeyworksforthe PlayorPausebutton,Fn+uparrowkeyfortheStopbutton,Fn+rightarrowkeyfortheNext Trackbutton,andFn+leftarrowkeyforthePreviousTrackbutton. Chapter6.Fnkeycombinations53 (...)

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Lenovo ThinkPad L412 Laptop Manual Chapter7.FRUreplacementnotices ExternalCRUstatementtocustomers: Someproblemswithyourproductcanberesolvedwithareplacementpartyoucaninstallyourself,called a“CustomerReplaceableUnit”or“CRU.”SomeCRUsaredesignatedasSelf-serviceCRUsandothers aredesignatedasOptional-serviceCRUs.InstallationofSelf-serviceCRUsisyourresponsibility;youmay requestthatLenovoinstallsanOptional-serviceCRUaccordingtothewarrantyserviceforyourproduct. Whereyouare (...)

62 Page 62 of Lenovo ThinkPad L412 Hardware maintenance manual

Lenovo ThinkPad L412 Laptop Manual •Torquedriver Ifyouhaveatorquedriver,refertotheTorquecolumninthescrewinformationtableforeachstep. •Makesurethatyouusethecorrectscrew.Itisrecommendedtousenewscrewsforreplacements. •Ifyouhaveatorquescrewdriver,tightenallscrewsrmlytothetorquespeciedinthescrewinformation tableforeachstep. •Ensuretorquescrewdriversarecalibratedcorrectlyfollowingcountryspecications. Retainingserialnumbers Thissectionincludesthefollowingdescri (...)

63 Page 63 of Lenovo ThinkPad L412 Hardware maintenance manual

Lenovo ThinkPad L412 Hardware maintenance manual MTMonrearlabel: TTTT-CTOS/NSSSSSSS ProductIDonrearlabel: TTTT-MMM(UsethisnumberwhensettingSerial Number) Intheexample,theSerialNumbertobeinputis“1STTTTMMMSSSSSSS”. RetainingtheUUID TheUniversallyUniqueIdentier(UUID)isa128-bitnumberuniquelyassignedtoyourcomputerat productionandstoredintheEEPROMofyoursystemboard.Thealgorithmthatgeneratesthenumberis designedtoprovideuniqueIDsuntiltheyearA.D.3400.Notwocomputersintheworldhavethesame n (...)

64 Page 64 of Lenovo ThinkPad L412 Hardware maintenance manual

Lenovo ThinkPad L412 Manual 58HardwareMaintenanceManual (...)

65 Page 65 of Lenovo ThinkPad L412 Hardware maintenance manual

Lenovo ThinkPad L412 Hardware maintenance manual Chapter8.RemovingandreplacingaFRU ExternalCRUstatementtocustomers: Someproblemswithyourproductcanberesolvedwithareplacementpartyoucaninstallyourself,called a“CustomerReplaceableUnit”or“CRU.”SomeCRUsaredesignatedasSelf-serviceCRUsandothers aredesignatedasOptional-serviceCRUs.InstallationofSelf-serviceCRUsisyourresponsibility;youmay requestthatLenovoinstallsanOptional-serviceCRUaccordingtothewarrantyserviceforyourproduct. Whereyou (...)

66 Page 66 of Lenovo ThinkPad L412 Hardware maintenance manual

Lenovo ThinkPad L412 Laptop Manual thebatterypackisdefective.AbatterypackFRUshouldnotbereplacedunlessthisdiagnosticshows thatthebatteryisdefective. Theonlyexceptiontothisisifthebatterypackisphysicallydamagedoracustomerisreportingapossible safetyissue. IfLenovoThinkVantageToolboxorLenovoSystemToolboxisnotinstalledinthecomputer,thecustomer shoulddownloadthisprogrambeforeanon-physicallydamagedbatterypackisreplaced.Notethatthe replacementofaphysicallydamagedbatterypackisnotc (...)

67 Page 67 of Lenovo ThinkPad L412 Hardware maintenance manual

Lenovo ThinkPad L412 Hardware maintenance manual 1020ExpressCardblankbezelandMediaCardblankbezel RemovalstepsofExpressCardblankbezel WhenyoupresstheExpressCardblankbezel1,itpopsout2. 1 2 Wheninstalling: Makesurethatthebezeliscorrectlyorientedasshowninthisgure. Chapter8.RemovingandreplacingaFRU61 (...)

68 Page 68 of Lenovo ThinkPad L412 Hardware maintenance manual

Lenovo ThinkPad L412 Manual RemovalstepsofMediaCardblankbezel WhenyoupresstheMediaCardblankbezel1,itpopsout2. 1 2 Wheninstalling: Makesurethatthebezeliscorrectlyorientedasshowninthefollowinggure. 1030Opticaldriveortravelcover Foraccess,removethisFRU: •1010Batterypack 62HardwareMaintenanceManual (...)

69 Page 69 of Lenovo ThinkPad L412 Hardware maintenance manual

ThinkPad L412 Removalstepsofopticaldriveortravelcover 1 StepScrew(quantity)Color Torque 1 M2×8mm,at-head,nylon-coated(1) Black0.181Nm (1.85kgfcm) 3 2 1040Thermalcover Foraccess,removethisFRU: •1010Batterypack Chapter8.RemovingandreplacingaFRU63 (...)

70 Page 70 of Lenovo ThinkPad L412 Hardware maintenance manual

ThinkPad L412 Removalstepsofthermalcover Note:Loosenthescrews1. 1 1 1 1 1 1 2 Attention:Donottouchorapplyanyexcessiveforcetothefanmotorlocatedintheslot.Itmightcause damagetothefanassemblyorthecomputertomulfunction. 1050Harddiskdrive(HDD)assembly Foraccess,removetheseFRUsinorder: •1010Batterypack •1040Thermalcover Attention: •Donotdropthedriveorapplyanyphysicalshocktoit.Thedriveissensitivetophysicalshock.Improper handlingcancausedamageandperm (...)

71 Page 71 of Lenovo ThinkPad L412 Hardware maintenance manual

Lenovo ThinkPad L412 Laptop Manual RemovalstepsofHDDassembly 1 Wheninstalling: MakesurethattheHDDisattachedrmly. 2 a Wheninstalling: DonotapplyexcessiveforcetotheHDDbracket a.Todoso,youmightbendorbreakit. 1060DIMM Foraccess,removetheseFRUsinorder: Chapter8.RemovingandreplacingaFRU65 (...)

72 Page 72 of Lenovo ThinkPad L412 Hardware maintenance manual

Lenovo ThinkPad L412 Hardware maintenance manual •1010Batterypack •1040Thermalcover RemovalstepsofDIMM 1 1 2 Note:IfonlyoneDIMMisusedonthecomputeryouareservicing,thecardmustbeinstalledinSLOT-0(a: thelowerslot),butnotinSLOT-1( b:theupperslot). b a Wheninstalling: InsertthenotchedendoftheDIMMintothesocket.PresstheDIMMrmly,andpivotituntilitsnapsinto place.Makesurethatitisrmlyinstalledintheslotanddoesnotmoveeasily. 1070Fanassembly Foraccess,removetheseFRUsinorder: •1010Bat (...)

73 Page 73 of Lenovo ThinkPad L412 Hardware maintenance manual

Lenovo ThinkPad L412 Manual Attention: •Donothandlethefanroughly.Improperhandlingofthefancancausedistortionordeformationand imperfectcontactwithcomponents. •Donottouchorapplyanyexcessiveforcetothefanmotor.Itmightcausedamagetothefanassemblyor thecomputertomulfunction. Removalstepsoffanassembly 1 Wheninstalling: Makesurethatthefanconnectorisattachedrmlytothesystemboard. Note:Loosenthescrews2ato2finorder.Whenyouattachthefan,securethescrewsinorder. ForThinkPa (...)

74 Page 74 of Lenovo ThinkPad L412 Hardware maintenance manual

Lenovo ThinkPad L412 Manual ForThinkPadL412: 2a 2d 2c 2b 2e 2f Notes: •Numberofthescrewsinstep 2differsbymodels. •Step3isonlyforthemodelswith15.6-inchwidescreen.Formodelswith14.0-inchwidescreen,skip step3. StepScrew(quantity)Color Torque 3 M2×4mm,at-head,nylon-coated(1)Silver 0.181Nm (1.85kgfcm) 4 Wheninstalling: Beforeyouattachthefanassemblytothecomputer,applythermalgrease,atanamountof0.2grams,on thepartsmarked aasinthefollowinggures.Eithertoomucho (...)

75 Page 75 of Lenovo ThinkPad L412 Hardware maintenance manual

Lenovo ThinkPad L412 Laptop Manual Fordiscretefanassembly: a b b b Forintegratedfanassembly: b 1080CPU Foraccess,removetheseFRUsinorder: •1010Batterypack •1040Thermalcover •1070Fanassembly Attention:TheCPUisextremelysensitive.WhenyouservicetheCPU,avoidanykindofroughhandling. Chapter8.RemovingandreplacingaFRU69 (...)

76 Page 76 of Lenovo ThinkPad L412 Hardware maintenance manual

Lenovo ThinkPad L412 Hardware maintenance manual RemovalstepsofCPU Rotatetheheadofthescrewinthedirectionshownbyarrow1toreleasethelock,thenremovetheCPU2. a 1 2 Wheninstalling: PlacetheCPUontheCPUsocket,andthenrotatetheheadofthescrewinthedirectionshownbyarrow atosecuretheCPU. 1090SIMslotcover Foraccess,removethisFRU: •1010Batterypack 70HardwareMaintenanceManual (...)

77 Page 77 of Lenovo ThinkPad L412 Hardware maintenance manual

ThinkPad L412 RemovalstepsofSIMslotcover Note:Loosenthescrew1. 1 2 SomemodelsmighthavetheSIMcardthatthecustomerhasbeeninstalled. IfthecomputeryouareservicinghastheSIMcard,removeitbeforeyoustarttheservicing. Afteryounishtheservicing,makesurethatyouinsertthecardbackintotheslotrmly. Chapter8.RemovingandreplacingaFRU71 (...)

78 Page 78 of Lenovo ThinkPad L412 Hardware maintenance manual

ThinkPad L412 1 2 1100WirelessWANslotcoverandPCIExpressMiniCardforwireless WAN Foraccess,removethisFRU: •1010Batterypack RemovalstepsofwirelessWANslotcoverandPCIExpressMiniCardforwirelessWAN Note:Loosenthescrew1. 1 72HardwareMaintenanceManual (...)

79 Page 79 of Lenovo ThinkPad L412 Hardware maintenance manual

Lenovo ThinkPad L412 Manual 2 Instep3aand3b,unplugthejacksbyusingtheremovaltoolantennaRFconnector(P/N:08K7159)orpick theconnectorswithyourngersandgentlyunplugtheminthedirectionofthearrow. 4 4 3a 3b Wheninstalling: Plugtheredcable 3aintothejacklabeledMAIN,andthebluecable3bintothejacklabeledAUXonthe card. StepScrew(quantity)Color Torque 4 M2×3mm,at-head,nylon-coated(2) Black0.181Nm (1.85kgfcm) 5 Chapter8.RemovingandreplacingaFRU73 (...)

80 Page 80 of Lenovo ThinkPad L412 Hardware maintenance manual

Lenovo ThinkPad L412 Hardware maintenance manual 1110Palmrestassemblywithcables Foraccess,removetheseFRUsinorder: •1010Batterypack •1030Opticaldriveortravelcover Note:Inmodelswiththengerprintreader,thesensorisattachedtothepalmrestFRU.Ifthengerprint readerhasanydefects,youcanreplaceitbytheproceduresgiveninthissection,whicharethesame forapalmrestwithorwithoutangerprintreader. Removalstepsofpalmrestassemblywithcables 2 2 2 2 2 1 1 2 2 StepScrew(quantity)Color Torque 1 M2× (...)

81 Page 81 of Lenovo ThinkPad L412 Hardware maintenance manual

Lenovo ThinkPad L412 Laptop Manual 3 3 4 5 6 7 6 8 7 Installationofpalmrestassemblywithcables Wheninstalling: 1.Attachthecablestothesystemboardrmly. 2.Attachthepalmrestsothatthetwosmallprojectionsofthepalmrestarmlytintotheguideholes ofthekeyboardbezelasshowninthisgure. Chapter8.RemovingandreplacingaFRU75 (...)

82 Page 82 of Lenovo ThinkPad L412 Hardware maintenance manual

Lenovo ThinkPad L412 Manual a a 3.Pushthefrontsideofthepalmrestuntilitclicksintoplace. 4.ClosetheLCDcoverandturnthecomputerover.Thenfastenthescrewstosecurethepalmrest. 1120PCIExpressMiniCardforwirelessLAN Foraccess,removetheseFRUsinorder: •1010Batterypack •1030Opticaldriveortravelcover •1110Palmrestassemblywithcables 76HardwareMaintenanceManual (...)

83 Page 83 of Lenovo ThinkPad L412 Hardware maintenance manual

Lenovo ThinkPad L412 Laptop Manual RemovalstepsofPCIExpressMiniCardforwirelessLAN Instep1aand1b,unplugthejacksbyusingtheremovaltoolantennaRFconnector(P/N:08K7159)orpick theconnectorswithyourngersandgentlyunplugtheminthedirectionofthearrow. 1a 1b 2 2 StepScrew(quantity)Color Torque 2 M2×3mm,at-head,nylon-coated(2) Black0.181Nm (1.85kgfcm) 3 Wheninstalling: PlugthegraycableintothejacklabeledMAIN,andtheblackcableintothejacklabeledAUXonthecard. Chapter8.Removingan (...)

84 Page 84 of Lenovo ThinkPad L412 Hardware maintenance manual

Lenovo ThinkPad L412 Hardware maintenance manual 1130Backupbattery Foraccess,removetheseFRUsinorder: •1010Batterypack •1030Opticaldriveortravelcover •1110Palmrestassemblywithcables DANGER Useonlythebatteryspeciedinthepartslistforyourcomputer.Anyotherbatterycouldignite orexplode. Removalstepsofbackupbattery 2 1 Wheninstalling: Makesurethatthebatteryconnectorisattachedrmlytothesystemboard. 1140Bluetoothdaughtercard(BDC-2) Foraccess,removetheseFRUsinorder: •1010Batterypac (...)

85 Page 85 of Lenovo ThinkPad L412 Hardware maintenance manual

Lenovo ThinkPad L412 Laptop Manual RemovalstepsofBluetoothdaughtercard 1 2 StepScrew(quantity)Color Torque 1 M2×3mm,at-head,nylon-coated(1) Black0.181Nm (1.85kgfcm) Wheninstalling: Makesurethattheconnectoronbottomsideofthecardisattachedrmlytothesystemboard. 1150MediaCardReaderslotboardandMediaCardReadercable assembly Foraccess,removetheseFRUsinorder: •1010Batterypack •1020ExpressCardblankbezelandMediaCardblankbezel •1030Opticaldriveortravelcover •1090SIM (...)

86 Page 86 of Lenovo ThinkPad L412 Hardware maintenance manual

Lenovo ThinkPad L412 Hardware maintenance manual RemovalstepsofMediaCardReaderslotboardandMediaCardReadercableassembly 1 1 Wheninstalling: MakesurethattheMediaCardReadercableassemblyisattachedrmlytothesystemboardandthe MediaCardReaderslotboard. 80HardwareMaintenanceManual (...)

87 Page 87 of Lenovo ThinkPad L412 Hardware maintenance manual

Lenovo ThinkPad L412 Hardware maintenance manual 2 2 3 StepScrew(quantity)Color Torque 2 M2×3mm,at-head,nylon-coated(2) Black0.181Nm (1.85kgfcm) 1160Keyboard Foraccess,removetheseFRUsinorder: •1010Batterypack •1030Opticaldriveortravelcover •1110Palmrestassemblywithcables Chapter8.RemovingandreplacingaFRU81 (...)

88 Page 88 of Lenovo ThinkPad L412 Hardware maintenance manual

Lenovo ThinkPad L412 Manual Removalstepsofkeyboard 1 StepScrew(quantity)Color Torque 1 M2×5mm,at-head,nylon-coated(1) Black0.181Nm (1.85kgfcm) 2 4 2 3 5 6 7 StepScrew(quantity)Color Torque 6 M2×3mm,at-head,nylon-coated(1) Black0.181Nm (1.85kgfcm) 7 M2×2mm,at-head,nylon-coated(1)Silver 0.181Nm (1.85kgfcm) 82HardwareMaintenanceManual (...)

89 Page 89 of Lenovo ThinkPad L412 Hardware maintenance manual

Lenovo ThinkPad L412 Manual 8 Wheninstallingthekeyboard,doasfollows: Installationofthekeyboard 1.Attachtheconnectors. 2.Attachthekeyboardsothatthekeyboardedgeisundertheframeasshowninthefollowinggure. 3.Gentlypressthekeyswithyourpalmsandslightlyslidethekeyboardtowardyouuntilitsnapsinto position. 4.Securethekeyboardbytighteningthescrewsfromthebottomsideofthecomputer. 1170Keyboardbezel Foraccess,removetheseFRUsinorder: •1010Batterypack •1030Opticaldriveortrav (...)

90 Page 90 of Lenovo ThinkPad L412 Hardware maintenance manual

Lenovo ThinkPad L412 Hardware maintenance manual •1070Fanassembly •1100WirelessWANslotcoverandPCIExpressMiniCardforwirelessWAN •1110Palmrestassemblywithcables •1120PCIExpressMiniCardforwirelessLAN •1160Keyboard Removalstepsofkeyboardbezel Note:Steps2aand3aareonlyforThinkPadL512.ForThinkPadL412,skipsteps2ato3a. 3 3 3 1 3a 1 2 2 2 2a 2a StepScrew(quantity)Color Torque 1 M2.5×6.5mm,at-head,nylon-coated(2) Black0.392Nm (4kgfcm) 2 M2×3mm,at-head,nylon-coated(3) Black0.1 (...)

91 Page 91 of Lenovo ThinkPad L412 Hardware maintenance manual

Lenovo ThinkPad L412 Manual 4 4 7 5 6 5 6 StepScrew(quantity)Color Torque 4 M2×3mm,at-head,nylon-coated(2) Black0.181Nm (1.85kgfcm) Wheninstalling: Makesurethattheconnectorsareattachedrmlytothesystemboard. 8 8 1180LCDunit Foraccess,removetheseFRUsinorder: •1010Batterypack Chapter8.RemovingandreplacingaFRU85 (...)

92 Page 92 of Lenovo ThinkPad L412 Hardware maintenance manual

ThinkPad L412 •1030Opticaldriveortravelcover •1100WirelessWANslotcoverandPCIExpressMiniCardforwirelessWAN •1110Palmrestassemblywithcables •1120PCIExpressMiniCardforwirelessLAN •1160Keyboard •1170Keyboardbezel RemovalstepsofLCDunit 1 1 StepScrew(quantity)Color Torque 1 M2.5×6.5mm,at-head,nylon-coated(2) Black0.392Nm (4kgfcm) 2 2 3 Wheninstalling: Makesurethattheconnectorsareattachedrmlytothesystemboard. 86HardwareMaintenanceManu (...)

93 Page 93 of Lenovo ThinkPad L412 Hardware maintenance manual

ThinkPad L412 Instep4,releasewirelessantennacablesfromthecableguides. ForThinkPadL512: 4 4 4 4 4 4 4 4 4 4 4 ForThinkPadL412: 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 Wheninstalling: Makesurethatthecablesareattachedtothecableguidesrmly. Attention:Whenyouroutethecables,makesurethattheyarenotsubjectedtoanytension.Tensioncould causethecablestobedamagedbythecableguides,orawiretobebroken. Chapter8.RemovingandreplacingaFRU87 (...)

94 Page 94 of Lenovo ThinkPad L412 Hardware maintenance manual

Lenovo ThinkPad L412 Laptop Manual ForThinkPadL512: 5 5 5 5 ForThinkPadL412: 5 5 5 5 StepScrew(quantity)Color Torque 5 M2.5×6.5mm,at-head,nylon-coated(4) Black0.392Nm (4kgfcm) 88HardwareMaintenanceManual (...)

95 Page 95 of Lenovo ThinkPad L412 Hardware maintenance manual

Lenovo ThinkPad L412 Manual 6 6 1190Topshieldingassembly Foraccess,removetheseFRUsinorder: •1010Batterypack •1030Opticaldriveortravelcover •1100WirelessWANslotcoverandPCIExpressMiniCardforwirelessWAN •1110Palmrestassemblywithcables •1120PCIExpressMiniCardforwirelessLAN •1160Keyboard •1170Keyboardbezel •1180LCDunit Chapter8.RemovingandreplacingaFRU89 (...)

96 Page 96 of Lenovo ThinkPad L412 Hardware maintenance manual

Lenovo ThinkPad L412 Manual Removalstepsoftopshieldingassembly ForThinkPadL512: 3 1 1 1 2 2 2 2 2 StepScrew(quantity)Color Torque 1 M2×3mm,at-head,nylon-coated(3) Black0.181Nm (1.85kgfcm) 2 M2×5mm,at-head,nylon-coated(5) Black0.181Nm (1.85kgfcm) ForThinkPadL412: 2 1 1 2 3 2 90HardwareMaintenanceManual (...)

97 Page 97 of Lenovo ThinkPad L412 Hardware maintenance manual

Lenovo ThinkPad L412 Manual StepScrew(quantity)Color Torque 1 M2×3mm,at-head,nylon-coated(2) Black0.181Nm (1.85kgfcm) 2 M2×5mm,at-head,nylon-coated(3) Black0.181Nm (1.85kgfcm) 1200Systemboardassembly •Toidentifythesystemboardoriginallyinstalledinyourcomputer,gotoPEWatthefollowingwebsite: http://www.lenovo.com/support/site.wss/document.do?lndocid=LOOK-WARNTY SelectWarrantyLookup.Inputthemachinetypeandtheserialnumber.Usethesystemboardlistedon PEW. Importan (...)

98 Page 98 of Lenovo ThinkPad L412 Hardware maintenance manual

Lenovo ThinkPad L412 Laptop Manual •1120PCIExpressMiniCardforwirelessLAN •1130Backupbattery •1140Bluetoothdaughtercard(BDC-2) •1150MediaCardReaderslotboardandMediaCardReadercableassembly •1160Keyboard •1170Keyboardbezel •1180LCDunit •1190Topshieldingassembly Locationofmajorsensitivecomponentsonthesystemboard Followingcomponentssolderedonthetopsideofthesystemboardareextremelysensitive.Whenyou servicethesystemboard,avoidanykindofroughhandling. a Acceleromet (...)

99 Page 99 of Lenovo ThinkPad L412 Hardware maintenance manual

Lenovo ThinkPad L412 Manual ForThinkPadL512integratedmodels(topside): a ForThinkPadL512integratedmodels(bottomside): b d ForThinkPadL412discretemodels(topside): a Chapter8.RemovingandreplacingaFRU93 (...)

100 Page 100 of Lenovo ThinkPad L412 Hardware maintenance manual

ThinkPad L412 ForThinkPadL412discretemodels(bottomside): b c d ForThinkPadL512discretemodels(topside): a ForThinkPadL512discretemodels(bottomside): b d c 94HardwareMaintenanceManual (...)

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