THINKPAD L520

Lenovo THINKPAD L520, THINKPAD L420, ThinkPad L421 Hardware Maintenance Manual

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HardwareMaintenanceManual
ThinkPadL420,L421,andL520
Note
Beforeusingthisinformationandtheproductitsupports,besuretoreadthegeneralinformationunder
AppendixA“Notices”onpage151
.
FourthEdition(August2011)
©CopyrightLenovo2011.
LIMITEDANDRESTRICTEDRIGHTSNOTICE:IfdataorsoftwareisdeliveredpursuantaGeneralServicesAdministration
“GSAcontract,use,reproduction,ordisclosureissubjecttorestrictionssetforthinContractNo.GS-35F-05925.
Contents
Aboutthismanual...........iii
Chapter1.Safetyinformation......1
Generalsafety................1
Electricalsafety...............2
Safetyinspectionguide............3
Handlingdevicesthataresensitivetoelectrostatic
discharge..................3
Groundingrequirements............4
Safetynotices(multilingualtranslations)......4
Lasercompliancestatement(multilingual
translations)................17
Chapter2.Importantservice
information..............25
StrategyforreplacingFRUs.........25
Strategyforreplacingaharddiskdrive...26
Importantnoticeforreplacingasystem
board................26
Howtouseerrormessage........26
StrategyforreplacingFRUsforCTO,CMV,and
GAV...................26
Productdenition............26
FRUidenticationforCTO,CMV,andGAV
products...............27
Chapter3.Generalcheckout.....29
Whattodorst..............29
Checkoutguide..............30
DiagnosticsusingPC-DoctorforDOS....30
LenovoThinkVantageToolbox.......33
FRUtests...............33
Powersystemcheckout...........34
Checkingtheacpoweradapter......34
Checkingoperationalcharging......35
Checkingthebatterypack........35
Checkingthebackupbattery.......36
Chapter4.Relatedservice
information..............37
RestoringthefactorycontentsbyusingRecovery
DiscSet.................37
Passwords................38
Power-onpassword...........38
Hard-diskpassword...........38
Supervisorpassword..........39
Howtoremovethepower-onpassword...39
Howtoremovethehard-diskpassword...39
Powermanagement............40
Screenblankmode...........40
Sleep(standby)mode..........40
Hibernationmode...........41
Symptom-to-FRUindex...........41
Numericerrorcodes..........42
Errormessages............44
No-beepsymptoms...........44
LCD-relatedsymptoms.........44
Intermittentproblems..........45
Undeterminedproblems.........45
Chapter5.Statusindicators.....47
Chapter6.Fnkeycombinations...49
Chapter7.FRUreplacement
notices................53
Screwnotices...............53
Retainingserialnumbers...........54
Restoringtheserialnumberofthesystem
unit.................54
RetainingtheUUID...........54
ReadingorwritingtheECAinformation...55
Chapter8.Removingandreplacinga
FRU..................57
1010Batterypack.............57
1020ExpressCardblankbezelandMediaCard
blankbezel................58
1030Opticaldriveortravelcover.......60
1040Thermalcover.............61
1050Harddiskdriveorsolidstatedrive
assembly.................62
1060DIMM................64
1070Fanassembly.............65
1080CPU................68
1090SIMslotcover............69
1110WirelessWANslotcoverandPCIExpress
MiniCardforwirelessWAN..........70
1110mSATAsolidstatedrive.........71
1120Palmrestassemblywithcables......73
1130PCIExpressMiniCardforwirelessLAN..76
1140Backupbattery............78
1150Bluetoothdaughtercard........78
1160MediaCardReaderslotboardandMedia
CardReadercableassembly.........79
1170Keyboard..............81
©CopyrightLenovo2011
i
1180Keyboardbezel............83
1190LCDunit...............85
2010Topshieldingassembly.........88
2020Systemboardassembly.........90
2030USBconnectorboardandUSBcable
assembly.................95
2040DC-incableandbasecover.......97
2050LCDfrontbezel............100
2060Speakerassembly...........101
2070Integratedcamera...........102
2080Antennaassembly...........103
2090Hinges,LCDpanel,LCDcable,andLCDrear
coverassembly..............105
Chapter9.Locations........109
Frontview................109
Rearview.................110
Bottomview...............110
Chapter10.Partslist........111
Overall..................112
LCDFRUs................132
Keyboard.................137
Miscellaneousparts............138
acpoweradapters.............140
Powercords...............140
Recoverydiscs..............141
WindowsXPProfessionalDVDs......141
WindowsXPProfessionalGenericDVDs...142
WindowsVistaBusiness(32bit)DVDs...143
WindowsVistaHomeBasic(32bit)DVDs..143
Windows7HomeBasic(32bit)DVDs....143
Windows7HomePremium(32bit)DVDs..144
Windows7HomePremium(64bit)DVDs..144
Windows7Professional(32bit)DVDs....145
Windows7Professional(64bit)DVDs....146
Windows7Starter(32bit)DVDs......147
Windows7Ultimate(32bit)DVDs.....148
Windows7Ultimate(64bit)DVDs.....148
Commonservicetools...........149
AppendixA.Notices.........151
Electronicemissionsnotices.........152
Trademarks................152
iiHardwareMaintenanceManual
Aboutthismanual
ThismanualcontainsserviceandreferenceinformationforthefollowingThinkPad
®
Notebookproducts.
ThinkPadL420
MachineType(MT)7826,7827,7829,7853,7854,and7856
ThinkPadL421
MT7826,7827,7829,7853,7854,and7856
ThinkPadL520
MT5015,5016,5017,5019,7859,and7860
Usethismanualalongwiththeadvanceddiagnosticteststotroubleshootproblems.
Important:
ThismanualisintendedonlyfortrainedservicetechnicianswhoarefamiliarwithThinkPadproducts.Use
thismanualalongwiththeadvanceddiagnosticteststotroubleshootproblemseffectively.
BeforeservicingaThinkPadproduct,besuretoreadalltheinformationunderChapter1“Safety
information”onpage1
andChapter2“Importantserviceinformation”onpage25.
©CopyrightLenovo2011
iii
ivHardwareMaintenanceManual
Chapter1.Safetyinformation
Thischapterpresentsfollowingsafetyinformationthatyouneedtobefamiliarwithbeforeyouservice
aThinkPadNotebook.
“Generalsafety”onpage1
“Electricalsafety”onpage2
“Safetyinspectionguide”onpage3
“Handlingdevicesthataresensitivetoelectrostaticdischarge”onpage3
“Groundingrequirements”onpage4
“Safetynotices(multilingualtranslations)”onpage4
“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.Somehandtoolshavehandlescoveredwithasoftmaterial
thatdoesnotinsulateyouwhenworkingwithliveelectricalcurrents.
Manycustomershave,neartheirequipment,rubberoormatsthatcontainsmallconductivebersto
decreaseelectrostaticdischarges.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:
2HardwareMaintenanceManual
Usecaution;donotbecomeavictimyourself.
Switchoffpower.
Sendanotherpersontogetmedicalaid.
Safetyinspectionguide
Thepurposeofthisinspectionguideistoassistyouinidentifyingpotentiallyunsafeconditions.Aseach
machinewasdesignedandbuilt,requiredsafetyitemswereinstalledtoprotectusersandservicetechnicians
frominjury.Thisguideaddressesonlythoseitems.Youshouldusegoodjudgmenttoidentifypotential
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.
Handlingdevicesthataresensitivetoelectrostaticdischarge
Anycomputerpartcontainingtransistorsorintegratedcircuits(ICs)shouldbeconsideredsensitiveto
electrostaticdischarge(ESD.)ESDdamagecanoccurwhenthereisadifferenceinchargebetweenobjects.
ProtectagainstESDdamagebyequalizingthechargesothatthemachine,thepart,theworkmat,andthe
personhandlingthepartareallatthesamecharge.
Notes:
1.Useproduct-specicESDprocedureswhentheyexceedtherequirementsnotedhere.
Chapter1.Safetyinformation3
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.
Safetynotices(multilingualtranslations)
Thesafetynoticesinthissectionareprovidedinthefollowinglanguages:
English
Arabic
BrazilianPortuguese
French
German
Hebrew
Japanese
Korean
Spanish
TraditionalChinese
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