Lenovo ideacentre AIO 520-24 IKL Owner's manual

ideacentreAll-In-One520(22&24inch)
ComputerHardwareMaintenanceManual
MachineType:F0D1[AIO520-24IKL/EnergyStar]F0D2[AIO
520-24IKU/EnergyStar]/F0D3[AIO520-24AST/EnergyStar]F0D4
[AIO520-22IKL/EnergyStar]/F0D5[AIO520-22IKU/EnergyStar]
F0D6[AIO520-22AST/EnergyStar]

ideacentreAll-In-One520(22&24inch)
Computer
HardwareMaintenanceManual
MachineType:F0D1[AIO520-24IKL/EnergyStar]F0D2[AIO
520-24IKU/EnergyStar]/F0D3[AIO520-24AST/EnergyStar]F0D4
[AIO520-22IKL/EnergyStar]/F0D5[AIO520-22IKU/EnergyStar]
F0D6[AIO520-22AST/EnergyStar]

FirstEdition(July2017)
©CopyrightLenovo2017.
LIMITEDANDRESTRICTEDRIGHTSNOTICE:IfdataoroftwarearedeliveredpuruantaGeneralService
Adminitration“GSA”contract,ue,reproduction,ordicloureiubjecttoretrictionetforthinContractNo.
GS-35F-05925

Contents
Chapter1.Aboutthisanual......1
ImportantSafetyInformation..........1
Chapter2.Safetyinforation......3
Generalafety................3
Electricalafety...............3
Safetyinpectionguide............5
Handlingelectrotaticdicharge-enitive
device..................5
Groundingrequirement............6
Safetynotice................6
Chapter3.Generalinforation.....9
Specification................9
Chapter4.GeneralCheckout.....11
Chapter5.UsingtheSetupUtility...13
StartingtheLenovoBIOSSetupUtilityprogram.13
Viewingandchangingetting........13
Uingpaword..............13
Enablingordiablingadevice........15
Selectingatartupdevice..........16
ExitingtheLenovoBIOSSetupUtilityprogram..17
Chapter6.Sypto-to-FRUIndex..19
Harddikdrivebooterror..........19
PowerSupplyProblem...........19
POSTerrorcode.............20
Undeterminedproblem...........20
Chapter7.Locatingconnectors,
controlsandcoponents......21
Chapter8.Replacinghardware....31
Generalinformation.............31
Replacingthekeyboardandmoue......32
Replacingtheadapter............32
Removingthetandbae..........33
Removingtherearcover...........33
Replacingthecamera............37
Replacingtheheat-ink...........38
ReplacingtheCPU.............39
Replacingtheharddikdrive.........42
Replacingtheytemfan..........43
Replacingtheopticaldrive..........44
Replacingthememorymodule........45
Replacingtheolidtatedrive........47
ReplacingtheWi-Ficard...........47
ReplacingtheideUSBboard........48
Replacingthemotherboard..........49
Removingthetandholder..........51
ReplacingtheMicrophonemodule.......51
Replacingthepeakerytem........52
ReplacingtheLCDpanelmodule.......53
Chapter9.FRUlists..........57
Chapter10.Generalinforation..101
AdditionalServiceInformation........101
©CopyrightLenovo2017iii

ivideacentreAll-In-One520(22&24inch)ComputerHardwareMaintenanceManual

Chapter1.Aboutthisanual
ThimanualcontainerviceandreferenceinformationforLenovoAll-In-One520eriecomputerlitedon
thecover.ItiintendedonlyfortrainedervicerwhoarefamiliarwithLenovocomputerproduct.
BeforeervicingaLenovoproduct,beuretoreadtheSafetyInformation.
ThedecriptionoftheTV-tunercardinthimanualapplieonlytocomputerwithaTV-tunercardintalled.
ItdoenotapplytocomputerwithoutaTV-tunercard.
IportantSafetyInforation
BeuretoreadallCAUTIONandDANGERectioninthimanualbeforefollowinganyoftheintruction.
VeuillezliretouteleconignedetypeDANGERetATTENTIONdupréentdocumentavantd’exécuter
leintruction.
LeenSieunbedingtalleHinweievomTyp“ACHTUNG”oder“VORSICHT”indieerDokumentation,bevor
SieirgendwelcheVorgängedurchführen
LeggereleitruzioniintrodottedaATTENZIONEePERICOLOpreentinelmanualeprimadieeguireuna
qualiaidelleitruzioni
Certifique-edelertodaaintruçõedecuidadoeperigonetemanualantedeexecutarqualquer
umadaintruçõe
Eimportantequeleatodaladeclaracionedeprecauciónydepeligrodeetemanualantedeeguir
laintruccione.
©CopyrightLenovo20171

2ideacentreAll-In-One520(22&24inch)ComputerHardwareMaintenanceManual

Chapter2.Safetyinforation
Thichaptercontaintheafetyinformationthatyouneedtobefamiliarwithbeforeervicingacomputer.
Generalsafety
Followtheeruletoenuregeneralafety:
•Keeptheareaaroundthecomputerclearandcleanduringandaftermaintenance.
•Whenliftinganyheavyobject:
1.Enureyoucantandafelywithoutlipping.
2.Ditributetheweightoftheobjectequallyacrobothfeet.
3.Liftlowly.Nevermoveuddenlyortwitwhenyouattempttolift.
4.Liftbytandingorbypuhingupwithyourlegmucle;thiactionremovethetrainfromthe
mucleinyourback.
Donotattempttoliftanyobjectsthatweighmorethan16kg(35lb)orobjectsthatyouthinkare
tooheavyforyou.
•Donotperformanyactionthatwouldcreateahazardforthecutomer,orwouldmakethecomputer
unafe.
•Beforeyoutartthecomputer,enurethatotherervicerepreentativeandcutomerperonnelarenot
inapoitionthatwouldcreateahazardforthem.
•Placeremovedcoverandotherpartinaafeplace,awayfromallperonnel,whileyouareervicingthe
computer.
•Keepyourtoolcaeawayfromareathatpeoplemaywalkthroughtoenureno-onetripoverit.
•Donotwearlooeclothingthatcanbetrappedinthemovingpartofamachine.Enurethatyourleeve
arefatenedorrolledupaboveyourelbow.Ifyourhairilong,tieorfatenitback.
•Inerttheendofyournecktieorcarfinideclothingorfatenitwithanon-conductiveclip,
approximately8centimeter(3inche)fromtheend.
•Donotwearjewelry,chain,metal-frameeyeglae,ormetalfatenerforyourclothing.
Reeber:Metalobjectaregoodelectricalconductor.
•Wearafetyglaewhenyouare:hammering,drillingoldering,cuttingwire,attachingpring,uing
olvent,orworkinginanyotherconditionthatmightbehazardoutoyoureye.
•Afterervice,reintallallafetyhield,guard,label,andgroundwire.Replaceanyafetydevice
thatiwornordefective.
•Reattachallcovercorrectlybeforereturningthecomputertothecutomer.
Electricalsafety
CAUTION:
Electricalcurrentfropower,telephone,andcounicationcablescanbehazardous.Toavoid
personalinjuryorequipentdaage,disconnectanyattachedpowercords,telecounication
cables,networkcables,andodecablesbeforeyouopenthecoputercovers,unlessinstructed
otherwiseintheinstallationandconfigurationprocedures.
©CopyrightLenovo20173

Obervethefollowingrulewhenworkingonelectricalequipment.
Iportant:Ueonlyapprovedtoolandtetequipment.Somehandtoolhavehandlecoveredwithaoft
materialthatdoenotinulateyouwhenworkingwithliveelectricalcurrent.Manycutomerhaverubber
floormatneartheirequipmentthatcontainmallconductivefibertodecreaeelectrotaticdicharge.
•Findtheroomemergencypower-off(EPO)witch,diconnectingwitch,orelectricaloutlet.Ifanelectrical
accidentoccur,youcanthenoperatethewitchorunplugthepowercordquickly.
•Donotworkaloneunderhazardouconditionornearequipmentthathahazardouvoltage.
•Diconnectallpowerbefore:
–Performingamechanicalinpection
–Workingnearpowerupplie
–RemovingorintallingFieldReplaceableUnit(FRU)
•Beforeyoutarttoworkonthecomputer,unplugthepowercord.Ifyoucannotunplugit,akthe
cutomertopower-offtheelectricaloutletthatuppliepowertothemachineandtolocktheelectrical
outletintheoffpoition.
•Ifyouneedtoworkonacomputerthathaexpoedelectricalcircuit,obervethefollowingprecaution:
–Enurethatanotherperon,familiarwiththepower-offcontrol,inearyou.
Reeber:Anotherperonmutbetheretowitchoffthepower,ifneceary.
–Ueonlyonehandwhenworkingwithpowered-onelectricalequipment;keeptheotherhandinyour
pocketorbehindyourback.
Reeber:Theremutbeacompletecircuittocaueelectricalhock.Byobervingtheaboverule,
youmaypreventacurrentfrompaingthroughyourbody.
–Whenuingateter,etthecontrolcorrectlyanduetheapprovedprobeleadandacceoriefor
thatteter.
–Standonuitablerubbermat(obtainedlocally,ifneceary)toinulateyoufromgrounducha
metalfloortripandmachineframe.
Obervethepecialafetyprecautionwhenyouworkwithveryhighvoltage;theeintructionarein
theafetyectionofthemaintenanceinformation.Ueextremecarewhenmeauringhighvoltage.
•Regularlyinpectandmaintainyourelectricalhandtooltoenuretheyareafetoue.
•Donotuewornorbrokentoolandteter.
•Neverassumethatpowerhabeendiconnectedfromacircuit.Firt,checkthatithabeenpoweredoff.
•Alwaylookcarefullyforpoiblehazardinyourworkarea.Exampleoftheehazardarewetfloor,
non-groundedpowerextenioncable,conditionthatmaycaueorallowpowerurge,andmiing
afetyground.
•Donottouchliveelectricalcircuitwiththereflectiveurfaceofaplaticdentalmirror.Thiurfacei
conductive,andtouchingalivecircuitcancaueperonalinjuryanddamagetothecomputer.
•Donotervicethefollowingpartwiththepoweronwhentheyareremovedfromtheirnormaloperating
poitioninacomputer:
–Powerupplyunit
–Pump
–Blowerandfan
–Motorgenerator
andimilarunit.(Thipracticeenurecorrectgroundingoftheunit.)
•Ifanelectricalaccidentoccur:
–Uecaution;donotbecomeavictimyourelf.
4ideacentreAll-In-One520(22&24inch)ComputerHardwareMaintenanceManual

–Switchoffpower.
–Sendanotherperontogetmedicalaid.
Safetyinspectionguide
Theintentofthiinpectionguideitoaityouinidentifyingpotentialhazardpoedbytheeproduct.
Eachcomputer,aitwadeignedandbuilt,hadrequiredafetyitemintalledtoprotectuerand
erviceperonnelfrominjury.Thiguideaddreeonlythoeitem.However,goodjudgmenthouldbe
uedtoidentifypotentialafetyhazardduetoattachmentoffeatureoroptionnotcoveredbythi
inpectionguide.
Ifanyhazardarepreent,youmutdeterminehowerioutheapparenthazardcouldbeandwhetheryou
cancontinuewithoutfirtreolvingtheproblem.
Coniderthefollowingitemandtheafetyhazardtheypreent:
•Electricalhazard,epeciallyprimarypower(primaryvoltageontheframecancaueeriouorfatal
electricalhock).
•Exploivehazard,uchaadamagedCRTfaceorbulgingcapacitor
•Mechanicalhazard,uchalooeormiinghardware
Theguideconitofaerieofteppreentedaachecklit.Beginthecheckwiththepoweroff,and
thepowercorddiconnected.
Checklit:
1.Checkexteriorcoverfordamage(looe,broken,orharpedge).
2.Power-offthecomputer.Diconnectthepowercord.
3.Checkthepowercordfor:
a.Athird-wiregroundconnectoringoodcondition.Ueametertomeaurethird-wireground
continuityfor0.1ohmorlebetweentheexternalgroundpinandframeground.
b.Thepowercordhouldbetheappropriatetypeapecifiedinthepartliting.
c.Inulationmutnotbefrayedorworn.
4.Removethecover.
5.Checkforanyobvioualteration.Uegoodjudgmentatotheafetyofanyalteration.
6.Checkinidetheunitforanyobviouhazard,uchametalfiling,contamination,waterorother
liquid,orignoffireormokedamage.
7.Checkforworn,frayed,orpinchedcable.
8.Checkthatthepower-upplycoverfatener(creworrivet)havenotbeenremovedortamperedwith.
Handlingelectrostaticdischarge-sensitivedevices
Anycomputerpartcontainingtranitororintegratedcircuit(IC)houldbeconideredenitiveto
electrotaticdicharge(ESD).ESDdamagecanoccurwhenthereiadifferenceinchargebetweenobject.
ProtectagaintESDdamagebyequalizingthechargeothatthecomputer,thepart,theworkmat,andthe
peronhandlingthepartareallattheamecharge.
Notes:
1.Ueproduct-pecificESDprocedurewhentheyexceedtherequirementnotedhere.
2.MakeurethattheESDprotectivedeviceyouuehavebeencertified(ISO9000)afullyeffective.
WhenhandlingESD-enitivepart:
Chapter2.Safetyinformation5

•Keepthepartinprotectivepackageuntiltheyareinertedintotheproduct.
•Avoidcontactwithotherpeoplewhilehandlingthepart.
•Wearagroundedwrittrapagaintyourkintoeliminatetaticonyourbody.
•Preventthepartfromtouchingyourclothing.Motclothingiinulativeandretainachargeeven
whenyouarewearingawrittrap.
•Uetheblackideofagroundedworkmattoprovideatatic-freeworkurface.Thematiepecially
uefulwhenhandlingESD-enitivedevice.
•Selectagroundingytem,uchathoelitedbelow,toprovideprotectionthatmeetthepecific
ervicerequirement.
Note:TheueofagroundingytemideirablebutnotrequiredtoprotectagaintESDdamage.
–AttachtheESDgroundcliptoanyframeground,groundbraid,orgreen-wireground.
–UeanESDcommongroundorreferencepointwhenworkingonadouble-inulatedor
battery-operatedytem.Y oucanuecoaxorconnector-outidehellontheeytem.
–Uetheroundground-prongoftheACplugonAC-operatedcomputer.
Groundingrequireents
Electricalgroundingofthecomputerirequiredforoperatorafetyandcorrectytemfunction.Proper
groundingoftheelectricaloutletcanbeverifiedbyacertifiedelectrician.
Safetynotices
TheCAUTIONandDANGERafetynoticeinthiectionareprovidedinthelanguageofEnglih.
DANGER
Electricalcurrentfrompower,telephoneandcommunicationcableihazardou.
Toavoidashockhazard:
•Donotconnectordisconnectanycablesorperforinstallation,aintenance,orreconfiguration
ofthisproductduringanelectricalstor.
•Connectallpowercordstoaproperlywiredandgroundedelectricaloutlet.
•Connectanyequipentthatwillbeattachedtothisproducttoaproperlywiredoutlet.
•Whenpossible,useonehandonlytoconnectordisconnectsignalcables.
•Neverturnonanyequipentwhenthereisevidenceoffire,water,orstructuraldaage.
•Disconnecttheattachedpowercords,telecounicationscables,networkcables,andode
cablesbeforeyouopenthedevicecovers,unlessinstructedotherwiseintheinstallationand
configurationprocedures.
•Connectanddisconnectcablesasdescribedinthefollowingtablewheninstalling,oving,or
openingcoversonthisproductorattacheddevices.
6ideacentreAll-In-One520(22&24inch)ComputerHardwareMaintenanceManual

ToConnectToDisconnect
1.TurneverythingOFF.
2.Firt,attachallcabletodevice.
3.Attachignalcabletoconnector.
4.Attachpowercordtooutlet.
5.TurndeviceON.
1.TurneverythingOFF.
2.Firt,removepowercordfromoutlet.
3.Removeignalcablefromconnector.
4.Removeallcablefromdevice.
CAUTION:
Whenreplacingthelithiubattery,useonlyPartNuber45C1566oranequivalenttypebattery
recoendedbytheanufacturer.Ifyoursystehasaodulecontainingalithiubattery,replace
itonlywiththesaeoduletypeadebythesaeanufacturer.Thebatterycontainslithiuand
canexplodeifnotproperlyused,handled,ordisposedof.
Donot:
•Throwintoorierseinwater
•Heattoorethan100°C(212°F)
•Repairordisasseble
Disposeofthebatteryasrequiredbylocalordinancesorregulations.
CAUTION:
Whenlaserproducts(suchasCD-ROMs,DVD-ROMdrives,fiberopticdevices,ortransitters)are
installed,notethefollowing:
•Donotreovethecovers.Reovingthecoversofthelaserproductcouldresultinexposureto
hazardouslaserradiation.Therearenoserviceablepartsinsidethedevice.
•Useofcontrolsoradjustentsorperforanceofproceduresotherthanthosespecifiedherein
ightresultinhazardousradiationexposure.
DANGER
SoelaserproductscontainanebeddedClass3AorClass3Blaserdiode.Notethefollowing:
Thesediodeseitradiationwhenopen.Donotstareintothebea,donotviewdirectlywith
opticalinstruents,andavoiddirectexposuretothebea.
Chapter2.Safetyinformation7

≥18kg(37lbs)≥32kg(70.5lbs)≥55kg(121.2lbs)
CAUTION:
Usesafepracticeswhenlifting.
CAUTION:
Thepowercontrolbuttononthedeviceandthepowerswitchonthepowersupplydonotturnoff
theelectricalcurrentsuppliedtothedevice.Thedevicealsoighthaveorethanonepower
cord.Toreoveallelectricalcurrentfrothedevice,ensurethatallpowercordsaredisconnected
frothepowersource.
1
2
CAUTION:
Donotplaceanyobjectweighingorethan82kg(180lbs.)ontopofrack-ounteddevices.
8ideacentreAll-In-One520(22&24inch)ComputerHardwareMaintenanceManual

Chapter3.Generalinforation
Thichapterprovidegeneralinformationthatapplietoallcomputermodelcoveredbythimanual.
Specifications
Thiectionlitthephyicalpecificationforyourcomputer.
Thissectionliststhephysicalspecificationsforyourcoputer.
TypeLenovoAll-In-One520
Thiectionlitthephyicalpecification.
Environent
Airtemperature:
Operating:10°to35°C
Tranit:-20°to55°C
Humidity:
Operating:35%to80%
Tranit:20%to90%(40°C)
Altitude:86KPato106KPa
Electricalinput:
Inputvoltage:90V-264V(AC)
Inputfrequency:47Hz-63Hz
©CopyrightLenovo20179

10ideacentreAll-In-One520(22&24inch)ComputerHardwareMaintenanceManual

Chapter4.GeneralCheckout
Attention:Thedriveinthecomputeryouareervicingmighthavebeenrearrangedorthedrivetartup
equencemayhavebeenchanged.Beextremelycarefulduringwriteoperationuchacopying,aving,or
formatting.Dataorprogramcanbeoverwrittenifyouelectanincorrectdrive.
Generalerrormeageappearifaproblemorconflictifoundbyanapplication,theoperatingytem,or
both.Foranexplanationoftheemeage,refertotheinformationuppliedwiththatoftwarepackage.
Uethefollowingproceduretohelpdeterminethecaueoftheproblem:
1.Power-offthecomputerandallexternaldevice.
2.Checkallcableandpowercord.
3.Setalldiplaycontroltothemiddlepoition.
4.Power-onallexternaldevice.
5.Power-onthecomputer.
•Lookfordiplayederrorcode.
•Lookforreadableintructionoramainmenuonthediplay.
Ifyoudidnotreceivethecorrectrepone,proceedtotep6.
Ifyoudidreceivethecorrectrepone,proceedtotep7.
6.Ifoneofthefollowinghappen,followtheintructiongiven:
•IfthecomputerdiplayaPOSTerror,goto“POSTerrorcode” .
•Ifthecomputerhangandnoerroridiplayed,continueattep7.
7.Ifthetettopandyoucannotcontinue,replacethelatdeviceteted.
©CopyrightLenovo201711

12ideacentreAll-In-One520(22&24inch)ComputerHardwareMaintenanceManual

Chapter5.UsingtheSetupUtility
TheSetupUtilityprogramiuedtoviewandchangetheconfigurationettingofyourcomputer,regardle
ofwhichoperatingytemyouareuing.However,theoperatingytemettingmightoverrideanyimilar
ettingintheSetupUtilityprogram.
StartingtheLenovoBIOSSetupUtilityprogra
TotarttheLenovoBIOSSetupUtilityprogram,dothefollowing:
1.Ifyourcomputerialreadyonwhenyoutartthiprocedure,hutdowntheoperatingytemand
turnoffthecomputer.
2.PreandholdtheF1keythenturnonthecomputer.WhentheLenovoBIOSSetupUtilityprogrami
diplayed,releaetheF1key.
Note:IfaPower-OnPawordoranAdminitratorPawordhabeenet,theSetupUtilityprogrammenu
willnotbediplayeduntilyoutypeyourpaword.Formoreinformation,ee“Uingpaword.”
Viewingandchangingsettings
SytemconfigurationoptionarelitedintheLenovoBIOSSetupUtilityprogrammenu.T ovieworchange
etting,ee“StartingtheSetupUtilityprogram.”
YoumutuethekeyboardwhenuingtheLenovoBIOSSetupUtilitymenu.Thekeyuedtoperform
varioutakarediplayedonthebottomofeachcreen.
Usingpasswords
YoucanuetheLenovoBIOSSetupUtilityprogramtoetpawordtopreventunauthorizedperon
fromgainingaccetoyourcomputeranddata.See“StartingtheSetupUtilityprogram.”Thefollowing
typeofpawordareavailable:
•AdminitratorPaword
•Power-OnPaword
Youdonothavetoetanypawordtoueyourcomputer.However,ifyoudecidetoetpaword,read
thefollowingection.
Passwordconsiderations
Apawordcanbeanycombinationofletterandnumberupto16character(a-zand0-9).Forecurity
reaon,itiagoodideatoueatrongpawordthatcannotbeeailycompromied.Weuggetthat
pawordhouldfollowtheerule:
•Foratrongpaword,ue7-16characterandamixofletterandnumber.
•Donotueyournameoryouruername.
•Donotueacommonwordoracommonname.
•Ueomethingignificantlydifferentfromyourprevioupaword.
Attention:AdminitratorandPower-Onpawordarenotcaeenitive.
©CopyrightLenovo201713

AdinistratorPassword
SettinganAdminitratorPaworddeterunauthorizedperonfromchangingconfigurationetting.Y ou
mightwanttoetanAdminitratorPawordifyouarereponibleformaintainingtheettingofeveral
computer.
AfteryouetanAdminitratorPaword,apawordpromptidiplayedeverytimeyouaccetheLenovo
BIOSSetupUtilityprogram.
IfboththeAdminitratorandPower-OnPawordareet,youcantypeeitherpaword.However,youmut
ueyourAdminitratorPawordtochangeanyconfigurationetting.
Setting,changing,ordeletinganAdinistratorpassword
ToetanAdminitratorPaword,dothefollowing:
Note:Apawordcanbeanycombinationofletterandnumberupto16character(a-zand0-9).For
moreinformation,ee“Pawordconideration”onpage13.
1.StarttheLenovoBIOSSetupUtilityprogram(ee“StartingtheLenovoBIOSSetupUtilityprogram”on
page13).
2.FromtheSecuritymenu,electSetAdinistratorPasswordandpretheEnterkey.
3.Thepaworddialogboxwillbediplayed.TypethepawordthenpretheEnterkey.
4.Re-typethepawordtoconfirm,thenpretheEnterkey.Ifyoutypedthepawordcorrectly,
thepawordwillbeintalled.
TochangeanAdminitratorPaword,dothefollowing:
1.StarttheLenovoBIOSSetupUtilityprogram(ee“StartingtheLenovoBIOSSetupUtilityprogram”on
page13).
2.FromtheSecuritymenu,electSetAdinistratorPasswordandpretheEnterkey.
3.Thepaworddialogboxwillbediplayed.TypethecurrentpawordthenpretheEnterkey.
4.Typethenewpaword,thenpretheEnterkey.Re-typethepawordtoconfirmthenewpaword.
Ifyoutypedthenewpawordcorrectly,thenewpawordwillbeintalled.ASetupNoticedconfirming
thatchangehavebeenavedwillbediplayed.
TodeleteaprevioulyetAdminitratorPaword,dothefollowing:
1.FromtheSecuritymenu,electSetAdinistratorPasswordandpretheEnterkey.
2.Thepaworddialogboxwillbediplayed.TypethecurrentpawordandpretheEnterkey.
3.TodeleteanAdinistratorPassword,leaveeachnewpawordlineitemblank,thenpretheEnter
key.ASetupNoticeconfirmingthatchangehavebeenavedwillbediplayed.
4.ReturntotheLenovoBIOSSetupUtilityprogrammenuandelecttheExitoption.
5.SelectSavechangesandExitfromthemenu.
Power-OnPassword
WhenaPower-OnPawordiet,youcannottarttheLenovoBIOSSetupUtilityprogramuntilavalid
paworditypedfromthekeyboard.
Setting,changing,ordeletingaPower-OnPassword
Note:Apawordcanbeanycombinationofletterandnumberupto16character(a-zand0-9).
14ideacentreAll-In-One520(22&24inch)ComputerHardwareMaintenanceManual