Lenovo ideacentre AIO 720-24IKB Quick Start Guide [en, ar, bg, cs, da, de, el, es, et, fi, fr, he, hr, hu, it, ko, nb, nl, pl, pt, ro, ru, sk, sl, sr, sv, th, tr, uk, zh]

ideacentreAll-In-One720ComputerHardware
MaintenanceManual

MachineTypes:F0CM[AIO720-24IKB/EnergyStar]

ideacentreAll-In-One720Computer
HardwareMaintenanceManual

MachineTypes:F0CM[AIO720-24IKB/EnergyStar]

FirstEdition(July2016)14th

©CopyrightLenovo2016.

LIMITEDANDRESTRICTEDRIGHTSNOTICE:IfdataorsoftwarearedeliveredpursuantaGeneralServices
Administration“GSA”contract,use,reproduction,ordisclosureissubjecttorestrictionssetforthinContractNo.
GS-35F-05925

Contents

Chapter1.Aboutthismanual.....1

ImportantSafetyInformation.........1

Chapter2.Safetyinformation.....3

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

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

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

Handlingelectrostaticdischarge-sensitive

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

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

Safetynotices...............6

Chapter3.Generalinformation....9

Specifications...............9

Chapter4.GeneralCheckout.....11

Chapter5.UsingtheSetupUtility...13

StartingtheLenovoBIOSSetupUtilityprogram.13

Viewingandchangingsettings........13

Usingpasswords..............13

Enablingordisablingadevice........15

Selectingastartupdevice..........16

ExitingtheLenovoBIOSSetupUtilityprogram..17

Chapter6.Symptom-to-FRUIndex..19

Harddiskdrivebooterror..........19

PowerSupplyProblems...........19

POSTerrorcodes.............20

Undeterminedproblems...........20

Chapter7.Locatingconnectors,

controlsandcomponents......21

Chapter8.Replacinghardware....27

Generalinformation.............27

Replacingthekeyboardandmouse......28

Replacingtheadapter............28

Removingthestandbase..........29

Removingtherearcover...........29

Replacingtheharddiskdrive.........30

Replacingthememorymodule........31

Replacingthesolidstatedrive........32

Removingthestandholder..........33

Removingthemiddlecover.........34

Replacingthefrontbezel...........36

Replacingthepowerswitchboard.......36

RemovingtheEMIcover...........37

Replacingthecamera............38

Removingthemountbracket.........40

Replacingthepowersupplyunit........41

Replacingthespeakersystem........42

ReplacingtheWi-Ficard...........43

Replacingtheheat-sink...........44

Replacingthesystemfan..........45

Replacingthemotherboard..........47

ReplacingtheLCDpanelmodule.......48

Chapter9.Generalinformation....51

AdditionalServiceInformation........51

©CopyrightLenovo2016

iii

ivideacentreAll-In-One720ComputerHardwareMaintenanceManual

Chapter1.Aboutthismanual

ThismanualcontainsserviceandreferenceinformationforLenovoAll-In-One720seriescomputerslistedon
thecover.ItisintendedonlyfortrainedservicerswhoarefamiliarwithLenovocomputerproducts.

BeforeservicingaLenovoproduct,besuretoreadtheSafetyInformation.

ThedescriptionoftheTV-tunercardinthismanualappliesonlytocomputerswithaTV-tunercardinstalled.
ItdoesnotapplytocomputerswithoutaTV-tunercard.

ImportantSafetyInformation

BesuretoreadallCAUTIONandDANGERsectionsinthismanualbeforefollowinganyoftheinstructions.

VeuillezliretouteslesconsignesdetypeDANGERetATTENTIONduprésentdocumentavantd’exécuter
lesinstructions.

LesenSieunbedingtalleHinweisevomTyp“ACHTUNG”oder“VORSICHT”indieserDokumentation,bevor
SieirgendwelcheVorgängedurchführen

LeggereleistruzioniintrodottedaA TTENZIONEePERICOLOpresentinelmanualeprimadieseguireuna
qualsiasidelleistruzioni

Certifique-sedelertodasasinstruçõesdecuidadoeperigonestemanualantesdeexecutarqualquer
umadasinstruções

Esimportantequeleatodaslasdeclaracionesdeprecauciónydepeligrodeestemanualantesdeseguir
lasinstrucciones.

©CopyrightLenovo2016

1

2ideacentreAll-In-One720ComputerHardwareMaintenanceManual

Chapter2.Safetyinformation

Thischaptercontainsthesafetyinformationthatyouneedtobefamiliarwithbeforeservicingacomputer.

Generalsafety

Followtheserulestoensuregeneralsafety:

•Keeptheareasaroundthecomputerclearandcleanduringandaftermaintenance.

•Whenliftinganyheavyobject:

1.Ensureyoucanstandsafelywithoutslipping.

2.Distributetheweightoftheobjectequallyacrossbothfeet.

3.Liftslowly.Nevermovesuddenlyortwistwhenyouattempttolift.

4.Liftbystandingorbypushingupwithyourlegmuscles;thisactionremovesthestrainfromthe
musclesinyourback.

Donotattempttoliftanyobjectsthatweighmorethan16kg(35lb)orobjectsthatyouthinkare
tooheavyforyou.

•Donotperformanyactionthatwouldcreateahazardforthecustomer,orwouldmakethecomputer
unsafe.

•Beforeyoustartthecomputer,ensurethatotherservicerepresentativesandcustomerpersonnelarenot
inapositionthatwouldcreateahazardforthem.

•Placeremovedcoversandotherpartsinasafeplace,awayfromallpersonnel,whileyouareservicingthe
computer.

•Keepyourtoolcaseawayfromareasthatpeoplemaywalkthroughtoensureno-onetripsoverit.

•Donotwearlooseclothingthatcanbetrappedinthemovingpartsofamachine.Ensurethatyoursleeves
arefastenedorrolledupaboveyourelbows.Ifyourhairislong,tieorfastenitback.

•Inserttheendsofyournecktieorscarfinsideclothingorfastenitwithanon-conductiveclip,
approximately8centimeters(3inches)fromtheend.

•Donotwearjewelry,chains,metal-frameeyeglasses,ormetalfastenersforyourclothing.
Remember:Metalobjectsaregoodelectricalconductors.

•Wearsafetyglasseswhenyouare:hammering,drillingsoldering,cuttingwire,attachingsprings,using
solvents,orworkinginanyotherconditionsthatmightbehazardoustoyoureyes.

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

•Reattachallcoverscorrectlybeforereturningthecomputertothecustomer.

Electricalsafety

CAUTION:
Electricalcurrentfrompower,telephone,andcommunicationcablescanbehazardous.Toavoid
personalinjuryorequipmentdamage,disconnectanyattachedpowercords,telecommunication
cables,networkcables,andmodemcablesbeforeyouopenthecomputercovers,unlessinstructed
otherwiseintheinstallationandconfigurationprocedures.

©CopyrightLenovo2016

3

Observethefollowingruleswhenworkingonelectricalequipment.

Important:Useonlyapprovedtoolsandtestequipment.Somehandtoolshavehandlescoveredwithasoft
materialthatdoesnotinsulateyouwhenworkingwithliveelectricalcurrents.Manycustomershaverubber
floormatsneartheirequipmentthatcontainsmallconductivefiberstodecreaseelectrostaticdischarge.

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

•Donotworkaloneunderhazardousconditionsornearequipmentthathashazardousvoltages.

•Disconnectallpowerbefore:

–Performingamechanicalinspection

–Workingnearpowersupplies

–RemovingorinstallingFieldReplaceableUnits(FRUs)

•Beforeyoustarttoworkonthecomputer,unplugthepowercord.Ifyoucannotunplugit,askthe
customertopower-offtheelectricaloutletthatsuppliespowertothemachineandtolocktheelectrical
outletintheoffposition.

•Ifyouneedtoworkonacomputerthathasexposedelectricalcircuits,observethefollowingprecautions:

–Ensurethatanotherperson,familiarwiththepower-offcontrols,isnearyou.

Remember:Anotherpersonmustbetheretoswitchoffthepower,ifnecessary.

–Useonlyonehandwhenworkingwithpowered-onelectricalequipment;keeptheotherhandinyour

pocketorbehindyourback.
Remember:Theremustbeacompletecircuittocauseelectricalshock.Byobservingtheaboverule,
youmaypreventacurrentfrompassingthroughyourbody.

–Whenusingatester,setthecontrolscorrectlyandusetheapprovedprobeleadsandaccessoriesfor

thattester.

–Standonsuitablerubbermats(obtainedlocally,ifnecessary)toinsulateyoufromgroundssuchas

metalfloorstripsandmachineframes.

Observethespecialsafetyprecautionswhenyouworkwithveryhighvoltages;theseinstructionsarein
thesafetysectionsofthemaintenanceinformation.Useextremecarewhenmeasuringhighvoltages.

•Regularlyinspectandmaintainyourelectricalhandtoolstoensuretheyaresafetouse.

•Donotusewornorbrokentoolsandtesters.

•Neverassumethatpowerhasbeendisconnectedfromacircuit.First,checkthatithasbeenpoweredoff.

•Alwayslookcarefullyforpossiblehazardsinyourworkarea.Examplesofthesehazardsarewetfloors,
non-groundedpowerextensioncables,conditionsthatmaycauseorallowpowersurges,andmissing
safetygrounds.

•Donottouchliveelectricalcircuitswiththereflectivesurfaceofaplasticdentalmirror.Thissurfaceis
conductive,andtouchingalivecircuitcancausepersonalinjuryanddamagetothecomputer.

•Donotservicethefollowingpartswiththepoweronwhentheyareremovedfromtheirnormaloperating
positionsinacomputer:

–Powersupplyunits

–Pumps

–Blowersandfans

–Motorgenerators

andsimilarunits.(Thispracticeensurescorrectgroundingoftheunits.)

•Ifanelectricalaccidentoccurs:

–Usecaution;donotbecomeavictimyourself.

4ideacentreAll-In-One720ComputerHardwareMaintenanceManual

–Switchoffpower.

–Sendanotherpersontogetmedicalaid.

Safetyinspectionguide

Theintentofthisinspectionguideistoassistyouinidentifyingpotentialhazardsposedbytheseproducts.
Eachcomputer,asitwasdesignedandbuilt,hadrequiredsafetyitemsinstalledtoprotectusersand
servicepersonnelfrominjury.Thisguideaddressesonlythoseitems.However,goodjudgmentshouldbe
usedtoidentifypotentialsafetyhazardsduetoattachmentoffeaturesoroptionsnotcoveredbythis
inspectionguide.

Ifanyhazardsarepresent,youmustdeterminehowserioustheapparenthazardcouldbeandwhetheryou
cancontinuewithoutfirstresolvingtheproblem.

Considerthefollowingitemsandthesafetyhazardstheypresent:

•Electricalhazards,especiallyprimarypower(primaryvoltageontheframecancauseseriousorfatal
electricalshock).

•Explosivehazards,suchasadamagedCRTfaceorbulgingcapacitor

•Mechanicalhazards,suchaslooseormissinghardware

Theguideconsistsofaseriesofstepspresentedasachecklist.Beginthecheckswiththepoweroff,and
thepowercorddisconnected.

Checklist:

1.Checkexteriorcoversfordamage(loose,broken,orsharpedges).

2.Power-offthecomputer.Disconnectthepowercord.

3.Checkthepowercordfor:

a.Athird-wiregroundconnectoringoodcondition.Useametertomeasurethird-wireground

continuityfor0.1ohmorlessbetweentheexternalgroundpinandframeground.

b.Thepowercordshouldbetheappropriatetypeasspecifiedinthepartslistings.

c.Insulationmustnotbefrayedorworn.

4.Removethecover.

5.Checkforanyobviousalterations.Usegoodjudgmentastothesafetyofanyalterations.

6.Checkinsidetheunitforanyobvioushazards,suchasmetalfilings,contamination,waterorother
liquids,orsignsoffireorsmokedamage.

7.Checkforworn,frayed,orpinchedcables.

8.Checkthatthepower-supplycoverfasteners(screwsorrivets)havenotbeenremovedortamperedwith.

Handlingelectrostaticdischarge-sensitivedevices

Anycomputerpartcontainingtransistorsorintegratedcircuits(ICs)shouldbeconsideredsensitiveto
electrostaticdischarge(ESD).ESDdamagecanoccurwhenthereisadifferenceinchargebetweenobjects.
ProtectagainstESDdamagebyequalizingthechargesothatthecomputer,thepart,theworkmat,andthe
personhandlingthepartareallatthesamecharge.

Notes:

1.Useproduct-specificESDprocedureswhentheyexceedtherequirementsnotedhere.

2.MakesurethattheESDprotectivedevicesyouusehavebeencertified(ISO9000)asfullyeffective.

WhenhandlingESD-sensitiveparts:

Chapter2.Safetyinformation5

•Keepthepartsinprotectivepackagesuntiltheyareinsertedintotheproduct.

•Avoidcontactwithotherpeoplewhilehandlingthepart.

•Wearagroundedwriststrapagainstyourskintoeliminatestaticonyourbody.

•Preventthepartfromtouchingyourclothing.Mostclothingisinsulativeandretainsachargeeven
whenyouarewearingawriststrap.

•Usetheblacksideofagroundedworkmattoprovideastatic-freeworksurface.Thematisespecially
usefulwhenhandlingESD-sensitivedevices.

•Selectagroundingsystem,suchasthoselistedbelow,toprovideprotectionthatmeetsthespecific
servicerequirement.

Note:TheuseofagroundingsystemisdesirablebutnotrequiredtoprotectagainstESDdamage.

–AttachtheESDgroundcliptoanyframeground,groundbraid,orgreen-wireground.

–UseanESDcommongroundorreferencepointwhenworkingonadouble-insulatedor

battery-operatedsystem.Y oucanusecoaxorconnector-outsideshellsonthesesystems.

–Usetheroundground-prongoftheACplugonAC-operatedcomputers.

Groundingrequirements

Electricalgroundingofthecomputerisrequiredforoperatorsafetyandcorrectsystemfunction.Proper
groundingoftheelectricaloutletcanbeverifiedbyacertifiedelectrician.

Safetynotices

TheCAUTIONandDANGERsafetynoticesinthissectionareprovidedinthelanguageofEnglish.

DANGER

Electricalcurrentfrompower,telephoneandcommunicationcablesishazardous.

Toavoidashockhazard:

•Donotconnectordisconnectanycablesorperforminstallation,maintenance,orreconfiguration
ofthisproductduringanelectricalstorm.

•Connectallpowercordstoaproperlywiredandgroundedelectricaloutlet.

•Connectanyequipmentthatwillbeattachedtothisproducttoaproperlywiredoutlet.

•Whenpossible,useonehandonlytoconnectordisconnectsignalcables.

•Neverturnonanyequipmentwhenthereisevidenceoffire,water,orstructuraldamage.

•Disconnecttheattachedpowercords,telecommunicationscables,networkcables,andmodem

cablesbeforeyouopenthedevicecovers,unlessinstructedotherwiseintheinstallationand
configurationprocedures.

•Connectanddisconnectcablesasdescribedinthefollowingtablewheninstalling,moving,or
openingcoversonthisproductorattacheddevices.

6ideacentreAll-In-One720ComputerHardwareMaintenanceManual

ToConnect

1.TurneverythingOFF .

2.First,attachallcablestodevices.

3.Attachsignalcablestoconnectors.

4.Attachpowercordstooutlet.

5.TurndeviceON.

ToDisconnect

1.TurneverythingOFF .

2.First,removepowercordsfromoutlets.

3.Removesignalcablesfromconnectors.

4.Removeallcablesfromdevices.

CAUTION:
Whenreplacingthelithiumbattery,useonlyPartNumber45C1566oranequivalenttypebattery
recommendedbythemanufacturer.Ifyoursystemhasamodulecontainingalithiumbattery,replace
itonlywiththesamemoduletypemadebythesamemanufacturer.Thebatterycontainslithiumand
canexplodeifnotproperlyused,handled,ordisposedof.

Donot:

•Throwintoorimmerseinwater

•Heattomorethan100°C(212°F)

•Repairordisassemble

Disposeofthebatteryasrequiredbylocalordinancesorregulations.

CAUTION:
Whenlaserproducts(suchasCD-ROMs,DVD-ROMdrives,fiberopticdevices,ortransmitters)are
installed,notethefollowing:

•Donotremovethecovers.Removingthecoversofthelaserproductcouldresultinexposureto
hazardouslaserradiation.Therearenoserviceablepartsinsidethedevice.

•Useofcontrolsoradjustmentsorperformanceofproceduresotherthanthosespecifiedherein
mightresultinhazardousradiationexposure.

DANGER

SomelaserproductscontainanembeddedClass3AorClass3Blaserdiode.Notethefollowing:

Thesediodesemitradiationwhenopen.Donotstareintothebeam,donotviewdirectlywith
opticalinstruments,andavoiddirectexposuretothebeam.

Chapter2.Safetyinformation7

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

1

2

CAUTION:
Usesafepracticeswhenlifting.

CAUTION:
Thepowercontrolbuttononthedeviceandthepowerswitchonthepowersupplydonotturnoff
theelectricalcurrentsuppliedtothedevice.Thedevicealsomighthavemorethanonepower
cord.Toremoveallelectricalcurrentfromthedevice,ensurethatallpowercordsaredisconnected
fromthepowersource.

CAUTION:
Donotplaceanyobjectweighingmorethan82kg(180lbs.)ontopofrack-mounteddevices.

8ideacentreAll-In-One720ComputerHardwareMaintenanceManual

Chapter3.Generalinformation

Thischapterprovidesgeneralinformationthatappliestoallcomputermodelscoveredbythismanual.

Specifications

Thissectionliststhephysicalspecificationsforyourcomputer.

Thissectionliststhephysicalspecificationsforyourcomputer.

TypeLenovoAll-In-One720

Thissectionliststhephysicalspecifications.

Environment

Airtemperature:

Operating:10°to35°C

Transit:-20°to55°C

Humidity:

Operating:35%to80%

Transit:20%to90%(40°C)

Altitude:86KPato106KPa

Electricalinput:

Inputvoltage:90V-264V(AC)

Inputfrequency:47Hz-63Hz

©CopyrightLenovo2016

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10ideacentreAll-In-One720ComputerHardwareMaintenanceManual

Chapter4.GeneralCheckout

Attention:Thedrivesinthecomputeryouareservicingmighthavebeenrearrangedorthedrivestartup

sequencemayhavebeenchanged.Beextremelycarefulduringwriteoperationssuchascopying,saving,or
formatting.Dataorprogramscanbeoverwrittenifyouselectanincorrectdrive.

Generalerrormessagesappearifaproblemorconflictisfoundbyanapplication,theoperatingsystem,or
both.Foranexplanationofthesemessages,refertotheinformationsuppliedwiththatsoftwarepackage.

Usethefollowingproceduretohelpdeterminethecauseoftheproblem:

1.Power-offthecomputerandallexternaldevices.

2.Checkallcablesandpowercords.

3.Setalldisplaycontrolstothemiddleposition.

4.Power-onallexternaldevices.

5.Power-onthecomputer.

•Lookfordisplayederrorcodes.

•Lookforreadableinstructionsoramainmenuonthedisplay.

Ifyoudidnotreceivethecorrectresponse,proceedtostep6.

Ifyoudidreceivethecorrectresponse,proceedtostep7.

6.Ifoneofthefollowinghappens,followtheinstructiongiven:

•IfthecomputerdisplaysaPOSTerror,goto“POSTerrorcodes” .

•Ifthecomputerhangsandnoerrorisdisplayed,continueatstep7.

7.Iftheteststopsandyoucannotcontinue,replacethelastdevicetested.

©CopyrightLenovo2016

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12ideacentreAll-In-One720ComputerHardwareMaintenanceManual

Chapter5.UsingtheSetupUtility

TheSetupUtilityprogramisusedtoviewandchangetheconfigurationsettingsofyourcomputer,regardless
ofwhichoperatingsystemyouareusing.However,theoperatingsystemsettingsmightoverrideanysimilar
settingsintheSetupUtilityprogram.

StartingtheLenovoBIOSSetupUtilityprogram

TostarttheLenovoBIOSSetupUtilityprogram,dothefollowing:

1.Ifyourcomputerisalreadyonwhenyoustartthisprocedure,shutdowntheoperatingsystemand
turnoffthecomputer.

2.PressandholdtheF1keythenturnonthecomputer.WhentheLenovoBIOSSetupUtilityprogramis
displayed,releasetheF1key.

Note:IfaPower-OnPasswordoranAdministratorPasswordhasbeenset,theSetupUtilityprogrammenu
willnotbedisplayeduntilyoutypeyourpassword.Formoreinformation,see“Usingpasswords.”

Viewingandchangingsettings

SystemconfigurationoptionsarelistedintheLenovoBIOSSetupUtilityprogrammenu.Tovieworchange
settings,see“StartingtheSetupUtilityprogram. ”

YoumustusethekeyboardwhenusingtheLenovoBIOSSetupUtilitymenu.Thekeysusedtoperform
varioustasksaredisplayedonthebottomofeachscreen.

Usingpasswords

YoucanusetheLenovoBIOSSetupUtilityprogramtosetpasswordstopreventunauthorizedpersons
fromgainingaccesstoyourcomputeranddata.See“StartingtheSetupUtilityprogram.”Thefollowing
typesofpasswordsareavailable:

•AdministratorPassword

•Power-OnPassword

Youdonothavetosetanypasswordstouseyourcomputer.However,ifyoudecidetosetpasswords,read
thefollowingsections.

Passwordconsiderations

Apasswordcanbeanycombinationoflettersandnumbersupto16characters(a-zand0-9).Forsecurity
reasons,itisagoodideatouseastrongpasswordthatcannotbeeasilycompromised.Wesuggestthat
passwordsshouldfollowtheserules:

•Forastrongpassword,use7-16charactersandamixoflettersandnumbers.

•Donotuseyournameoryourusername.

•Donotuseacommonwordoracommonname.

•Usesomethingsignificantlydifferentfromyourpreviouspassword.

Attention:AdministratorandPower-Onpasswordsarenotcasesensitive.

©CopyrightLenovo2016

13

AdministratorPassword

SettinganAdministratorPassworddetersunauthorizedpersonsfromchangingconfigurationsettings.You
mightwanttosetanAdministratorPasswordifyouareresponsibleformaintainingthesettingsofseveral
computers.

AfteryousetanAdministratorPassword,apasswordpromptisdisplayedeverytimeyouaccesstheLenovo
BIOSSetupUtilityprogram.

IfboththeAdministratorandPower-OnPasswordareset,youcantypeeitherpassword.However,youmust
useyourAdministratorPasswordtochangeanyconfigurationsettings.

Setting,changing,ordeletinganAdministratorpassword

TosetanAdministratorPassword,dothefollowing:

Note:Apasswordcanbeanycombinationoflettersandnumbersupto16characters(a-zand0-9).For
moreinformation,see“Passwordconsiderations”onpage13.

1.StarttheLenovoBIOSSetupUtilityprogram(see“StartingtheLenovoBIOSSetupUtilityprogram”on
page13).

2.FromtheSecuritymenu,selectSetAdministratorPasswordandpresstheEnterkey.

3.Thepassworddialogboxwillbedisplayed.TypethepasswordthenpresstheEnterkey.

4.Re-typethepasswordtoconfirm,thenpresstheEnterkey.Ifyoutypedthepasswordcorrectly,
thepasswordwillbeinstalled.

TochangeanAdministratorPassword,dothefollowing:

1.StarttheLenovoBIOSSetupUtilityprogram(see“StartingtheLenovoBIOSSetupUtilityprogram”on
page13).

2.FromtheSecuritymenu,selectSetAdministratorPasswordandpresstheEnterkey.

3.Thepassworddialogboxwillbedisplayed.TypethecurrentpasswordthenpresstheEnterkey.

4.T ypethenewpassword,thenpresstheEnterkey.Re-typethepasswordtoconfirmthenewpassword.
Ifyoutypedthenewpasswordcorrectly,thenewpasswordwillbeinstalled.ASetupNoticedconfirming
thatchangeshavebeensavedwillbedisplayed.

TodeleteapreviouslysetAdministratorPassword,dothefollowing:

1.FromtheSecuritymenu,selectSetAdministratorPasswordandpresstheEnterkey.

2.Thepassworddialogboxwillbedisplayed.TypethecurrentpasswordandpresstheEnterkey.

3.T odeleteanAdministratorPassword,leaveeachnewpasswordlineitemblank,thenpresstheEnter
key.ASetupNoticeconfirmingthatchangeshavebeensavedwillbedisplayed.

4.ReturntotheLenovoBIOSSetupUtilityprogrammenuandselecttheExitoption.

5.SelectSavechangesandExitfromthemenu.

Power-OnPassword

WhenaPower-OnPasswordisset,youcannotstarttheLenovoBIOSSetupUtilityprogramuntilavalid
passwordistypedfromthekeyboard.

Setting,changing,ordeletingaPower-OnPassword

Note:Apasswordcanbeanycombinationoflettersandnumbersupto16characters(a-zand0-9).

14ideacentreAll-In-One720ComputerHardwareMaintenanceManual

TosetaPower-OnPassword,dothefollowing:

1.StarttheLenovoBIOSSetupUtilityprogram(See”StartingtheLenovoBIOSSetupUtilityprogram”on
page13.)

2.FromtheSecuritymenu,selectSetPower-OnPasswordandpresstheEnterkey.

3.Thepassworddialogboxwillbedisplayed.Typethepassword,thenpresstheEnterkey.

4.Re-typethepasswordtoconfirm.Ifyoutypedthepasswordcorrectly,thepasswordwillbeinstalled.

TochangeaPower-OnPassword,dothefollowing:

1.StarttheLenovoBIOSSetupUtilityprogram(See”StartingtheLenovoBIOSSetupUtilityprogram”on
page13.)

2.FromtheSecuritymenu,selectSetPower-OnPasswordandpresstheEnterkey.

3.Thepassworddialogboxwillbedisplayed.TypethecurrentpasswordthenpresstheEnterkey.

4.T ypethenewpassword,thenpresstheEnterkey.Re-typethepasswordtoconfirmthenewpassword.
Ifyoutypedthenewpasswordcorrectly,thenewpasswordwillbeinstalled.ASetupNoticedconfirming
thatchangeshavebeensavedwillbedisplayed.

TodeleteapreviouslysetPower-OnPassword,dothefollowing:

1.FromtheSecuritymenu,selectSetPower-OnPasswordandpresstheEnterkey.

2.Thepassworddialogboxwillbedisplayed.TypethecurrentpasswordandpresstheEnterkey.

3.T odeletethePower-OnPassword,leaveeachnewpasswordlineitemblank,thenpressEnter.ASetup
Noticeconfirmingthatchangeshavebeensavedwillbedisplayed.

4.ReturntotheLenovoBIOSSetupUtilityprogrammenuandselecttheExitoption.

5.SelectSavechangesandExitfromthemenu.

Enablingordisablingadevice

TheDevicesoptionsisusedtoenableordisableuseraccesstothefollowingdevices:

USBFunctionsSelectwhethertoenableordisableUSB(UniversalSerial

Bus)functions.Ifthefunctionsaredisabled,noUSB
devicescanbeused.

SATAMode

OnboardAudioControllerSelectwhethertoenableordisabletheOnboard

OnboardEthernetControllerorLANBootAgentSelectwhethertoenableordisabletheOnboardEthernet

Toenableordisableadevice,dothefollowing:

1.StarttheSetupUtilityprogram(see“StartingtheSetupUtilityprogram”onpage13).

2.FromtheSetupUtilityprogrammenu,selectDevices.

3.Selectanoptionasfollows:

WhenthisfeatureissettoDisabled,alldevices
connectedtotheSATAconnectors(e.g.harddiskdrives
ortheopticaldiskdrive)aredisabledandcannotbe
accessed.

AudioController.WhenthisfeatureissettoDisabled
alldevicesconnectedtotheaudioconnectors(e.g.
headphonesoramicrophone)aredisabledandcannot
beused.

Controller,orselectwhethertoenableordisableload
onboardPXE(PrebootExecutionEnvironment).

SelectUSBSetup,presstheEnterkey,thenselectUSBFunctions.

Chapter5.UsingtheSetupUtility15

SelectA TADeviceSetup,presstheEnterkey,thenselectSAT AMode.

SelectAudioSetup,presstheEnterkey,thenselectOnboardAudioController.

SelectNetworkSetup,presstheEnterkey,thenselectOnboardEthernetSupportorLANBoot
Agent.

4.SelectDisabledorEnabledandpresstheEnterkey.

5.ReturntotheLenovoBIOSSetupUtilityprogrammenuandselecttheExitoption.

6.SelectSavechangesandExitfromthemenu.

Notes:

a.Ifyoudonotwanttosavethesettings,selectDiscardchangesandExitfromthemenu.

b.SelectIDE/AHCIMode:DevicedriversupportisrequiredforACHI.Dependingonhowtheharddisk

imagewasinstalled,changingthissettingmaypreventthesystemfrombooting.

Selectingastartupdevice

IfyourcomputerdoesnotbootfromadevicesuchastheCD/DVD-ROMdrivediskorharddiskasexpected,
followoneoftheproceduresbelow.

Selectingatemporarystartupdevice

Usethisproceduretostartupfromanybootdevice.

Note:NotallCDs,DVDsorharddiskdrivesarebootable.

1.T urnoffyourcomputer.

2.PressandholdtheF12keythenturnonthecomputer.WhentheStartupDeviceMenuappears,
releasetheF12key.

Note:IftheStartupDeviceMenudoesnotdisplayusingthesesteps,repeatedlypressandreleasethe
F12keyratherthankeepingitpressedwhenturningonthecomputer.

3.Use↑and↓arrowstoselectthedesiredstartupdevicefromtheStartupDeviceMenuandpress
theEnterkeytobegin.

Note:SelectingastartupdevicefromtheStartupDeviceMenudoesnotpermanentlychangethe
startupsequence.

Selectingorchangingthestartupdevicesequence

Tovieworpermanentlychangetheconfiguredstartupdevicesequence,dothefollowing:

1.StarttheLenovoBIOSSetupUtilityprogram(see“StartingtheLenovoBIOSSetupUtilityprogram”on
page13).

2.FromtheLenovoBIOSSetupUtilityprogrammainmenu,selecttheStartupoption.

3.PresstheEnterkey,andselectthedevicesforthePrimaryBootSequence.Readtheinformation
displayedontherightsideofthescreen.

4.Use↑and↓arrowstoselectadevice.Usethe<+>or<->keystomoveadeviceupordown.Usethe

<×>keytoexcludethedevicefromorincludethedeviceinthebootsequence.

5.ReturntotheLenovoBIOSSetupUtilityprogrammenuandselecttheExitoption.

6.SelectSavechangesandExitfromthemenu.

Notes:

16ideacentreAll-In-One720ComputerHardwareMaintenanceManual

a.Ifyoudonotwanttosavethesettings,selectDiscardchangesandExitfromthemenu.

b.Ifyouhavechangedthesesettingsandwanttoreturntothedefaultsettings,selectLoadOptimal

Defaultsfromthemenu.

ExitingtheLenovoBIOSSetupUtilityprogram

Afteryoufinishviewingorchangingsettings,presstheEsckeytoreturntotheLenovoBIOSSetupUtility
programmainmenu.Y oumighthavetopresstheEsckeyseveraltimes.Dooneofthefollowing:

•Ifyouwanttosavethenewsettings,selectSavechangesandExitfromthemenu.WhentheSave&
resetwindowshows,selecttheY esbutton,andthenpresstheEnterkeytoexittheLenovoBIOS
SetupUtilityprogram.

•Ifyoudonotwanttosavethesettings,selectDiscardchangesandExitfromthemenu.Whenthe
ResetWithoutSavingwindowshows,selecttheY esbutton,andthenpresstheEnterkeytoexitthe
LenovoBIOSSetupUtilityprogram.

Chapter5.UsingtheSetupUtility17

18ideacentreAll-In-One720ComputerHardwareMaintenanceManual

Chapter6.Symptom-to-FRUIndex

TheSymptom-to-FRUindexlistserrorsymptomsandpossiblecauses.Themostlikelycauseislistedfirst.
AlwaysbeginwithChapter4,“GeneralCheckout, ”onpage11.Thisindexcanalsobeusedtohelpyou
decidewhichFRUstohaveavailablewhenservicingacomputer.Ifyouareunabletocorrecttheproblem
usingthisindex,goto“Undeterminedproblems”onpage20.

Notes:

•Ifyouhavebothanerrormessageandanincorrectaudioresponse,diagnosetheerrormessagefirst.

•Ifyoucannotrunthediagnostictestsoryougetadiagnosticerrorcodewhenrunningatestbutdid
receiveaPOSTerrormessage,diagnosethePOSTerrormessagefirst.

•Ifyoudidnotreceiveanyerrormessagelookforadescriptionofyourerrorsymptomsinthefirstpartof
thisindex.

Harddiskdrivebooterror

Aharddiskdrivebooterrorcanbecausedbythefollowing.

Error

Thestartupdriveisnotincludedinthebootsequence
configuration.

Nooperatingsystemisinstalledonthebootdrive.Installanoperatingsystemonthebootdrive.

Thebootsectoronthestartupdriveiscorrupted.

Thedriveisdefective.

FRU/Action

Checktheconfigurationandensurethestartupdriveis
inthebootsequence.

Thedrivemustbeformatted.Dothefollowing:

1.Attempttobackupthedataonthefailingharddisk
drive.

2.Usetheoperatingsystemtoformattheharddisk
drive.

Replacetheharddiskdrive.

PowerSupplyProblems

Followtheseproceduresifyoususpectthereisapowersupplyproblem.

Check/VerifyFRU/Action

Checkthatthefollowingareproperlyinstalled:

•PowerCord

•On/OffSwitchconnector

•SystemBoardPowerSupplyconnectors

•Microprocessorconnections

Checkthepowercord.PowerCord

Checkthepower-onswitch.Power-onSwitch

Reseatconnectors

©CopyrightLenovo2016

19

POSTerrorcodes

Eachtimeyouturnthecomputeron,itperformsaseriesofteststocheckthatthesystemisoperating
correctlyandthatcertainoptionsareset.ThisseriesoftestsiscalledthePower-OnSelf- Test,orPOST.
POSTdoesthefollowing:

•Checkssomebasicmotherboardoperations

•Checksthatthememoryisworkingcorrectly

•Startsvideooperations

•Verifiesthatthebootdriveisworking

POSTErrorMessageDescription/Action

Keyboarderror

RebootandSelectproperBootdeviceorInsertBoot
MediainselectedBootdevice

Cannotinitializethekeyboard.Makesurethekeyboard
isproperlyconnectedtothecomputerandthatnokeys
areheldpressedduringPOST.T opurposelyconfigure
thecomputerwithoutakeyboard,selectKeyboardless
operationinStartupandsettheoptiontoEnabled.The
BIOSthenignoresthemissingkeyboardduringPOST.

TheBIOSwasunabletofindasuitablebootdevice.Make
surethebootdriveisproperlyconnectedtothecomputer .
Makesureyouhavebootablemediainthebootdevice.

Undeterminedproblems

1.Power-offthecomputer.

2.Removeordisconnectthefollowingcomponents(ifconnectedorinstalled)oneatatime.

a.Externaldevices(modem,printer,ormouse)

b.Extendedvideomemory

c.ExternalCache

d.ExternalCacheRAM

e.Harddiskdrive

f.Diskdrive

3.Power-onthecomputertore-testthesystem.

4.Repeatsteps1through3untilyoufindthefailingdeviceorcomponent.

Ifalldevicesandcomponentshavebeenremovedandtheproblemcontinues,replacethesystemboard.

20ideacentreAll-In-One720ComputerHardwareMaintenanceManual

Chapter7.Locatingconnectors,controlsandcomponents

Thissectionprovidesillustrationstohelplocatethevariousconnectors,controlsandcomponentsofthe
computer.

Fontview

Thefollowingillustrationshowsthelocationofcontrolsandcomponentsonthefrontofthecomputer.

Attention:Becarefulnottoblockanyairventsonthecomputer.Blockedairventscancauseoverheating.

1.CameraLEDindicator

2.Built-incamera

©CopyrightLenovo2016

3.Built-inmicrophone

21

Leftandrightview

Thefollowingillustrationshowsthelocationofconnectors,controlsandcomponentsontheleftandright
sideofthecomputer.

1.USB3.0connectors

2.Memorycardreader5.Powerbutton

3.Comboaudiojack

4.HDMI-inswitch

22ideacentreAll-In-One720ComputerHardwareMaintenanceManual

Rearview

Thefollowingillustrationshowsthelocationofconnectorsandcomponentsontherearofthecomputer.

1.Securitycableslot6.USB2.0connector

2.Powerconnector

3.Ethernetconnector8.HDMI-inconnector

4.HDMI-outconnector9.Airvents

5.USB2.0connector

7.USB3.0connector

Chapter7.Locatingconnectors,controlsandcomponents23

Hardwarecomponents

1

2

3

4

8

7

6

9

13

16

17

18

19

20

11

10

14

12

5

15

21

Thefollowingillustrationshowsthecomponentsthatmakeupyourcomputer.

1.Standbase

2.Standholder

12.Powerbutton

13.Powersupplyunit

3.Cameramodule14.LCDpanel

4.Rearcover

15.Speakersystem

5.Heat-sink16.Micboard

6.Systemfan17.VESAmountbracket

7.Middlecover18.Wi-Ficard

8.Harddiskdrive19.EMIcover

9.Wi-Fiantenna20.Motherboard

10.Powerswitchboard21.Powersocket

11.Mainframe

24ideacentreAll-In-One720ComputerHardwareMaintenanceManual

Identifyingpartsonthemotherboard

1

A

1

AP

34

7

8

45

1

A

30

128

96

64

32

9

260

2

259

2 5

2 4

2 3

2 2

2 1

2 0

19

181716151413

12

11

10

9

8

7

6

5

4

3

2

1

Themotherboard(sometimescalledtheplanarorsystemboard)isthemaincircuitboardinyourcomputer.
Itprovidesbasiccomputingfunctionsandsupportsavarietyofdevicesthatarefactory-installedorthat
youcaninstalllater.Thefollowingillustrationshowsthelocationofconnectorsandcomponentsonthe
frontofthemotherboard.

1.Backlightconnector

2.Systemfanconnector15.USB2.0connector

14.USB2.0connector

3.SATApowercable16.USB3.0connector

4.SA T AHDDconnector

5.Powersupplyunitconnector

6.T ouchpanelconnector

7.LVDSconnector20.Cardreaderconnector

8.M.2solidstatedriveconnector

17.HDMI-inconnector

18.Speakerconnector

19.Comboaudiojack

21.USB3.0connector

9.Powerswitchboardconnector22.Memoryslots

10.Battery

23.CPU

11.Micconnector24.Wi-Ficardconnector

12.Ethernetconnector

13.HDMI-outconnector

25.Cameraconnector

Chapter7.Locatingconnectors,controlsandcomponents25

26ideacentreAll-In-One720ComputerHardwareMaintenanceManual

Chapter8.Replacinghardware

Attention:Donotremovethecomputercoverorattemptanyrepairbeforereadingthe“Importantsafetyinformation”

intheSafetyandWarrantyGuidethatwasincludedwithyourcomputer.T oobtaincopiesoftheSafetyandWarranty
Guide,gototheSupportWebsiteat:http://consumersupport.lenovo.com.

Note:UseonlypartsprovidedbyLenovo.

Generalinformation

Pre-disassemblyinstructions

Beforestartingthedisassemblyprocedure,makesurethatyoudothefollowing:

1.T urnoffthepowertothesystemandallperipherals.

2.Unplugallpowerandsignalcablesfromthecomputer.

3.Placethesystemonaflat,stablesurface.

©CopyrightLenovo2016

27

Replacingthekeyboardandmouse

Note:YourkeyboardwillbeconnectedtoaUSBconnectorateithersideorattherearofthecomputer.

Toreplacethekeyboardandmouse:

Step1.Removeanymediafromthedrives,shutdownthecomputer,andturnoffallattacheddevices.

Step2.Unplugallpowercordsfromelectricaloutlets.

Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)

cables,andanyothercablesthatareconnectedtothecomputer..

Step4.Locatetheconnectorforthekeyboard.RefertoLocatingconnectors,controlsandcomponentsto

locatethevariousconnectors.

Step5.Disconnectthedefectivekeyboardcablefromthecomputerandconnectthenewkeyboardcable

tothesameconnector.

Step6.Themousecanbereplacedusingthesamemethod.

Replacingtheadapter

Attention:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.

Step1.Removeanymediafromthedrives,shutdowntheoperatingsystem,andturnoffthecomputer

andallattacheddevices.

Step2.Disconnecttheadapterfromtheconnectoronthecomputer,thenunplugtheadapterfrom

electricaloutlet.

28ideacentreAll-In-One720ComputerHardwareMaintenanceManual

Step3.Connectthenewadapterasshown.

Removingthestandbase

Attention:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.

Note:Itmaybehelpfultoplacethecomputerface-downonasoftflatsurfaceforthisprocedure.Lenovo

recommendsthatyouuseablanket,towel,orothersoftclothtoprotectthetouchscreenfromscratches
orotherdamage.

Step1.Removeanymediafromthedrives,shutdowntheoperatingsystem,andturnoffthecomputer

andallattacheddevices.

Step2.Unplugallpowercordsfromelectricaloutlets.

Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)

cables,andanyothercablesthatareconnectedtothecomputer.RefertoLocatingconnectors,
controlsandcomponentstolocatethevariousconnectors.

Step4.Removetherubber,andthentwistthehandscrewringcounter-clockwiseuntilthestandbaseis

loosened.12

Step5.Removethestandbasefromthestandholderandputitaside.3

Removingtherearcover

Attention:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.

Note:Itmaybehelpfultoplacethecomputerface-downonasoftflatsurfaceforthisprocedure.Lenovo

recommendsthatyouuseablanket,towel,orothersoftclothtoprotectthetouchscreenfromscratches
orotherdamage.

Chapter8.Replacinghardware29

Step1.Removeanymediafromthedrives,shutdowntheoperatingsystem,andturnoffthecomputer

andallattacheddevices.

Step2.Unplugallpowercordsfromelectricaloutlets.

Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)

cables,andanyothercablesthatareconnectedtothecomputer.RefertoLocatingconnectors,
controlsandcomponentstolocatethevariousconnectors.

Step4.Slideouttherearcover.

Step5.Toreattachtherearcover:

a.Lineuptherearcoverwithmountingholesonthebackofthecomputer,thenslideitbackinto

position.

Replacingtheharddiskdrive

Attention:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.

Note:Itmaybehelpfultoplacethecomputerface-downonasoftflatsurfaceforthisprocedure.Lenovo

recommendsthatyouuseablanket,towel,orothersoftclothtoprotectthetouchscreenfromscratches
orotherdamage.

Step1.Removeanymediafromthedrives,shutdowntheoperatingsystem,andturnoffthecomputer

andallattacheddevices.

Step2.Unplugallpowercordsfromelectricaloutlets.

Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)

cables,andanyothercablesthatareconnectedtothecomputer.RefertoLocatingconnectors,
controlsandcomponentstolocatethevariousconnectors.

Step4.Removetherearcover.RefertoRemovingtherearcover.

30ideacentreAll-In-One720ComputerHardwareMaintenanceManual

Step5.Pressthelockingpinandthenliftuptheharddiskdrivemodulefromthecomputer.1

Step6.Disconnectthesignalcablefromtheharddiskdrive.

Step7.Removethefourscrewsthatsecuretheharddiskdrivetothebracket.2

Step8.Liftupthebracketfromtheharddiskdrive.3

Step9.Toinstallthenewharddiskdrive:

a.Lineupthenewharddiskdrivewiththebracketandsecureitwithfourscrews.

b.Connectthedataandpowercablestothenewharddiskdrive.

c.Slidetheharddiskdrivemodulebackintoposition.

Step10.Reinstalltheremovedparts.

Replacingthememorymodule

Attention:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.

Note:Itmaybehelpfultoplacethecomputerface-downonasoftflatsurfaceforthisprocedure.Lenovo

recommendsthatyouuseablanket,towel,orothersoftclothtoprotectthetouchscreenfromscratches
orotherdamage.

Step1.Removeanymediafromthedrives,shutdowntheoperatingsystem,andturnoffthecomputer

andallattacheddevices.

Step2.Unplugallpowercordsfromelectricaloutlets.

Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)

cables,andanyothercablesthatareconnectedtothecomputer.RefertoLocatingconnectors,
controlsandcomponentstolocatethevariousconnectors.

Step4.Removetherearcover.RefertoRemovingtherearcover.

Chapter8.Replacinghardware31

Step5.Removethememorycover.1

Step6.Opentheretainingclips2andgentlypullthememorymoduleoutofthememoryslot.3

Step7.Toinstallthenewmemorymodule:

a.Positionthenewmemorymoduleoverthememoryslot.Ensurethatthenotch2onthe

memorymodulealignscorrectlywiththeslotkey1inthememoryslot.Pressthememory
moduledownuntilsnapsintoposition.

b.Reinstallthememorycover.

Step8.Reinstalltheremovedparts.

Replacingthesolidstatedrive

Attention:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.

Note:Itmaybehelpfultoplacethecomputerface-downonasoftflatsurfaceforthisprocedure.Lenovo

recommendsthatyouuseablanket,towel,orothersoftclothtoprotectthetouchscreenfromscratches
orotherdamage.

Step1.Removeanymediafromthedrives,shutdowntheoperatingsystem,andturnoffthecomputer

andallattacheddevices.

Step2.Unplugallpowercordsfromelectricaloutlets.

32ideacentreAll-In-One720ComputerHardwareMaintenanceManual

Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)

cables,andanyothercablesthatareconnectedtothecomputer.RefertoLocatingconnectors,
controlsandcomponentstolocatethevariousconnectors.

Step4.Removetherearcover.RefertoRemovingtherearcover.

Step5.Removethememorycover.1

Step6.Removethescrewthatsecurethesolidstatedrivetothemotherboard2,andthenslideoutthe

solidstatedrive.

3

Step7.Toinstallthenewsolidstatedrive:

a.Insertthesolidstatedriveintotheslot.

b.Securethenewsolidstatedrivetomotherboardwithonescrew.

c.Reinstallthememorycover.

Step8.Reinstalltheremovedparts.

Removingthestandholder

Attention:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.

Note:Itmaybehelpfultoplacethecomputerface-downonasoftflatsurfaceforthisprocedure.Lenovo

recommendsthatyouuseablanket,towel,orothersoftclothtoprotectthetouchscreenfromscratches
orotherdamage.

Step1.Removeanymediafromthedrives,shutdowntheoperatingsystem,andturnoffthecomputer

andallattacheddevices.

Step2.Unplugallpowercordsfromelectricaloutlets.

Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)

cables,andanyothercablesthatareconnectedtothecomputer.RefertoLocatingconnectors,
controlsandcomponentstolocatethevariousconnectors.

Step4.Removethestandbase.RefertoRemovingthestandbase.

Step5.Removetherearcover.RefertoRemovingtherearcover.

Chapter8.Replacinghardware33

Step6.Removethefourscrewsthatsecurethestandholdertothechassis,andthenliftupthestand

holdertoremoveit.

Step7.Toreattachthestandholder:

a.Aligntheholesinthestandholderwiththecorrespondingholesinthechassis.

b.Securethestandholdertothechassiswithfourscrews.

Removingthemiddlecover

Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.

Note:Itmaybehelpfultoplacethecomputerface-downonasoftflatsurfaceforthisprocedure.Lenovo

recommendsthatyouuseablanket,towel,orothersoftclothtoprotectthecomputerscreenfromscratches
orotherdamage.

Toremovethemiddlecover:

Step1.Removeanymediafromthedrives,shutdowntheoperatingsystem,andturnoffthecomputer

andallattacheddevices.

Step2.Unplugallpowercordsfromelectricaloutlets.

Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)

cables,andanyothercablesthatareconnectedtothecomputer.RefertoLocatingconnectors,
controlsandcomponentstolocatethevariousconnectors.

Step4.Removethestandbase.RefertoRemovingthestandbase.

Step5.Removetherearcover.RefertoRemovingtherearcover.

34ideacentreAll-In-One720ComputerHardwareMaintenanceManual

Step6.Loosethetwoscrewsthatsecurethemiddlecovertothemainframe.

Step7.Removethestandholder.RefertoRemovingthestandholder.

Step8.Liftupthemiddlecoverasshown.

Step9.Toreattachthemiddlecover:

a.Lineupthemiddlecoverwiththemainframe,andthenpressthemiddlecoveruntilitsnaps

intoposition.

b.Securethemiddlecovertothemainframewithtwoscrews.

Chapter8.Replacinghardware35

Replacingthefrontbezel

Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.

Note:Itmaybehelpfultoplacethecomputerface-downonasoftflatsurfaceforthisprocedure.Lenovo

recommendsthatyouuseablanket,towel,orothersoftclothtoprotectthecomputerscreenfromscratches
orotherdamage.

Toreplacethefrontbezel

Step1.Removeanymediafromthedrives,shutdowntheoperatingsystem,andturnoffthecomputer

andallattacheddevices.

Step2.Unplugallpowercordsfromelectricaloutlets.

Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)

cables,andanyothercablesthatareconnectedtothecomputer.RefertoLocatingconnectors,
controlsandcomponentstolocatethevariousconnectors.

Step4.Removetherearcover.RefertoRemovingtherearcover.

Step5.Removetheharddiskdrive.RefertoReplacingtheharddiskdrive.

Step6.Removethestandbase.RefertoRemovingthestandbase.

Step7.Removethestandholder.RefertoRemovingthestandholder.

Step8.Removethemiddlecover.RefertoRemovingthemiddlecover.

Step9.Removethetwoscrewsthatsecurethefrontbezeltothemainframe.1

Step10.Removethefrontbezelasshown.2

Step11.T oinstallthenewfrontbezel:attachthenewfrontbezeltothemainframeandsecureitwith

twoscrews.

Step12.Reinstalltheremovedparts,andthenreconnectthedisconnectedcables.

Replacingthepowerswitchboard

Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.

36ideacentreAll-In-One720ComputerHardwareMaintenanceManual

Note:Itmaybehelpfultoplacethecomputerface-downonasoftflatsurfaceforthisprocedure.Lenovo

recommendsthatyouuseablanket,towel,orothersoftclothtoprotectthecomputerscreenfromscratches
orotherdamage.

Toreplacethepowerswitchboard

Step1.Removeanymediafromthedrives,shutdowntheoperatingsystem,andturnoffthecomputer

andallattacheddevices.

Step2.Unplugallpowercordsfromelectricaloutlets.

Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)

cables,andanyothercablesthatareconnectedtothecomputer.RefertoLocatingconnectors,
controlsandcomponentstolocatethevariousconnectors.

Step4.Removethestandbase.RefertoRemovingthestandbase.

Step5.Removetherearcover.RefertoRemovingtherearcover.

Step6.Removethestandholder.RefertoRemovingthestandholder.

Step7.Removethemiddlecover.RefertoRemovingthemiddlecover.

Step8.Removethetwoscrewsthatsecurethepowerswitchboardtothechassis.

Step9.Disconnectthesignalcablefromthepowerswitchboard.

Step10.T oinstallthenewpowerswitchboard:

a.Connectthesignalcabletothenewpowerswitchboard.

b.Alignthenewpowerswitchboardintopositionandsecureitwithtwoscrews.

Step11.Reinstallalltheremovedparts,andthenreconnectallthedisconnectedcables.

RemovingtheEMIcover

Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.

Chapter8.Replacinghardware37

Note:Itmaybehelpfultoplacethecomputerface-downonasoftflatsurfaceforthisprocedure.Lenovo
recommendsthatyouuseablanket,towel,orothersoftclothtoprotectthecomputerscreenfromscratches
orotherdamage.

ToreplacetheEMIcover

Step1.Removeanymediafromthedrives,shutdowntheoperatingsystem,andturnoffthecomputer

andallattacheddevices.

Step2.Unplugallpowercordsfromelectricaloutlets.

Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)

cables,andanyothercablesthatareconnectedtothecomputer.RefertoLocatingconnectors,
controlsandcomponentstolocatethevariousconnectors.

Step4.Removethestandbase.RefertoRemovingthestandbase.

Step5.Removetherearcover.RefertoRemovingtherearcover.

Step6.Removethestandholder.RefertoRemovingthestandholder.

Step7.Removethemiddlecover.RefertoRemovingthemiddlecover.

Step8.RemovethesixscrewsthatsecuretheEMIcovertothechassis,andthenliftitup.

Step9.ToinstallthenewEMIcover:

a.AligntheholesintheEMIcoverwiththemountingholesinthechassis.

b.SecuretheEMIcovertothechassiswithsixscrews.

Replacingthecamera

Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.

38ideacentreAll-In-One720ComputerHardwareMaintenanceManual

Note:Itmaybehelpfultoplacethecomputerface-downonasoftflatsurfaceforthisprocedure.Lenovo

recommendsthatyouuseablanket,towel,orothersoftclothtoprotectthecomputerscreenfromscratches
orotherdamage.

Toreplacethecamera:

Step1.Removeanymediafromthedrives,shutdowntheoperatingsystem,andturnoffthecomputer

andallattacheddevices.

Step2.Unplugallpowercordsfromelectricaloutlets.

Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)

cables,andanyothercablesthatareconnectedtothecomputer.RefertoLocatingconnectors,
controlsandcomponentstolocatethevariousconnectors.

Step4.Removetherearcover.RefertoRemovingtherearcover.

Step5.Removethestandbase.RefertoRemovingthestandbase.

Step6.Removethestandholder.RefertoRemovingthestandholder.

Step7.Removethemiddlecover.RefertoRemovingthemiddlecover.

Step8.RemovetheEMIcover.RefertoRemovingtheEMIcover.

Step9.Disconnectthecameracableformthecorrespondingconnectoronthemotherboard.Referto

Locatingconnectors,controlsandcomponents.

Step10.Pressthecameramodule1,andthenliftupthecameramodulecover2.

Chapter8.Replacinghardware39

Step11.Removethetwoscrewsthatsecurethecameratothechassis,andthenremovethecamera.

Step12.T oinstallthenewcamera:

a.Alignthenewcameraintoposition,andthensecureittothechassiswithtwoscrews.

b.Connectthecameracabletothemotherboard.

c.Reinstallthecameracover.

Step13.Reinstallalltheremovedparts,andthenreconnectallthedisconnectedcables.

Removingthemountbracket

Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.

Note:Itmaybehelpfultoplacethecomputerface-downonasoftflatsurfaceforthisprocedure.Lenovo

recommendsthatyouuseablanket,towel,orothersoftclothtoprotectthecomputerscreenfromscratches
orotherdamage.

Toreplacethemountbracket

Step1.Removeanymediafromthedrives,shutdowntheoperatingsystem,andturnoffthecomputer

andallattacheddevices.

Step2.Unplugallpowercordsfromelectricaloutlets.

Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)

cables,andanyothercablesthatareconnectedtothecomputer.RefertoLocatingconnectors,
controlsandcomponentstolocatethevariousconnectors.

Step4.Removethestandbase.RefertoRemovingthestandbase.

Step5.Removetherearcover.RefertoRemovingtherearcover.

Step6.Removethestandholder.RefertoRemovingthestandholder.

Step7.Removethemiddlecover.RefertoRemovingthemiddlecover.

Step8.RemovetheEMIcover.RefertoRemovingtheEMIcover.

40ideacentreAll-In-One720ComputerHardwareMaintenanceManual

Step9.Removethefourscrewsthatsecurethemountbrackettothechassis,andthenliftitup.

Step10.T oinstallthenewmountbracket:

a.Aligntheholesinthenewmountbracketwiththemountingholesinthechassis.

b.Securethemountbrackettothechassiswithfourscrews.

Replacingthepowersupplyunit

Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.

Note:Itmaybehelpfultoplacethecomputerface-downonasoftflatsurfaceforthisprocedure.Lenovo

recommendsthatyouuseablanket,towel,orothersoftclothtoprotectthecomputerscreenfromscratches
orotherdamage.

Toreplacethepowersupplyunit

Step1.Removeanymediafromthedrives,shutdowntheoperatingsystem,andturnoffthecomputer

andallattacheddevices.

Step2.Unplugallpowercordsfromelectricaloutlets.

Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)

cables,andanyothercablesthatareconnectedtothecomputer.RefertoLocatingconnectors,
controlsandcomponentstolocatethevariousconnectors.

Step4.Removethestandbase.RefertoRemovingthestandbase.

Step5.Removetherearcover.RefertoRemovingtherearcover.

Step6.Removetheharddiskdrive.RefertoReplacingtheharddiskdrive.

Step7.Removethestandholder.RefertoRemovingthestandholder.

Step8.Removethemiddlecover.RefertoRemovingthemiddlecover.

Step9.RemovetheEMIcover.RefertoRemovingtheEMIcover.

Chapter8.Replacinghardware41

Step10.Removethemountbracket.RefertoRemovingthemountbracket.

Step11.Removethefourscrewsthatsecurethepowersupplyunittothechassis.

Step12.Disconnectthecablefromthemotherboardandthepowersocket.

Step13.T oinstallthenewpowersupplyunit:

a.Connectthecableofthenewpowersupplyunittothecorrespondingconnectoronthe

motherboardandpowersocket.

b.Alignthenewpowersupplyunitintopositionandsecureitwithfourscrews.

Step14.Reinstallalltheremovedparts,andthenreconnectallthedisconnectedcables.

Replacingthespeakersystem

Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.

Note:Itmaybehelpfultoplacethecomputerface-downonasoftflatsurfaceforthisprocedure.Lenovo

recommendsthatyouuseablanket,towel,orothersoftclothtoprotectthecomputerscreenfromscratches
orotherdamage.

Toreplacethespeakersystem:

Step1.Removeanymediafromthedrives,shutdowntheoperatingsystem,andturnoffthecomputer

andallattacheddevices.

Step2.Unplugallpowercordsfromelectricaloutlets.

Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)

cables,andanyothercablesthatareconnectedtothecomputer.RefertoLocatingconnectors,
controlsandcomponentstolocatethevariousconnectors.

Step4.Removethestandbase.RefertoRemovingthestandbase.

Step5.Removetherearcover.RefertoRemovingtherearcover.

Step6.Removethestandholder.RefertoRemovingthestandholder.

42ideacentreAll-In-One720ComputerHardwareMaintenanceManual

Step7.Removethemiddlecover.RefertoRemovingthemiddlecover.

Step8.RemovetheEMIcover.RefertoRemovingtheEMIcover.

Step9.Removethefourscrewsthatsecurethespeakersystemtothechassis,andthendisconnectthe

speakercablefromtheconnectoronthemotherboard.

Step10.Liftupthespeakersystemtoremoveit.

Step11.T oinstallthenewspeakersystem:

a.Alignthenewspeakersystemintoposition,andthensecureittothechassiswithfourscrews.

b.Connectthecabletothemotherboard.

Step12.Reinstallalltheremovedparts,andthenreconnectallthedisconnectedcables.

ReplacingtheWi-Ficard

Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.

Note:Itmaybehelpfultoplacethecomputerface-downonasoftflatsurfaceforthisprocedure.Lenovo

recommendsthatyouuseablanket,towel,orothersoftclothtoprotectthecomputerscreenfromscratches
orotherdamage.

ToreplacetheWi-Ficard:

Step1.Removeanymediafromthedrives,shutdowntheoperatingsystem,andturnoffthecomputer

andallattacheddevices.

Step2.Unplugallpowercordsfromelectricaloutlets.

Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)

cables,andanyothercablesthatareconnectedtothecomputer.RefertoLocatingconnectors,
controlsandcomponentstolocatethevariousconnectors.

Step4.Removethestandbase.RefertoRemovingthestandbase.

Chapter8.Replacinghardware43

Step5.Removetherearcover.RefertoRemovingtherearcover.

Step6.Removethestandholder.RefertoRemovingthestandholder.

Step7.Removethemiddlecover.RefertoRemovingthemiddlecover.

Step8.RemovetheEMIcover.RefertoRemovingtheEMIcover.

Step9.RemovethescrewthatsecurestheWi-Ficardtothemotherboard.1

Step10.DisconnecttheantennacablesfromtheWi-Ficard.2

Step11.PulltheWi-Ficardoutoftheslot.

Step12.T oinstallthenewWi-Ficard:

a.InsertthenewWi-FicardintotheWi-Ficardslot.

b.ConnecttheantennacablestothenewWi-Ficard.

c.SecurenewtheWi-Ficardtothemotherboardwiththescrew.

Step13.Reinstallalltheremovedparts,andthenreconnectallthedisconnectedcables.

Replacingtheheat-sink

Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.

Note:Itmaybehelpfultoplacethecomputerface-downonasoftflatsurfaceforthisprocedure.Lenovo

recommendsthatyouuseablanket,towel,orothersoftclothtoprotectthecomputerscreenfromscratches
orotherdamage.

Toreplacetheheat-sink:

Step1.Removeanymediafromthedrives,shutdowntheoperatingsystem,andturnoffthecomputer

andallattacheddevices.

44ideacentreAll-In-One720ComputerHardwareMaintenanceManual

Step2.Unplugallpowercordsfromelectricaloutlets.

Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)

cables,andanyothercablesthatareconnectedtothecomputer.RefertoLocatingconnectors,
controlsandcomponentstolocatethevariousconnectors.

Step4.Removethestandbase.RefertoRemovingthestandbase.

Step5.Removetherearcover.RefertoRemovingtherearcover.

Step6.Removethestandholder.RefertoRemovingthestandholder.

Step7.Removethemiddlecover.RefertoRemovingthemiddlecover.

Step8.RemovetheEMIcover.RefertoRemovingtheEMIcover.

Step9.Loosentheninescrewsthatsecuretheheat-sinktothemotherboard,andthenliftuptheheat-sink

andremoveit.

Attention:Placetheheat-sinkupsidedownonaflatsurfacetopreventthermalgreasefromcontaminating
othercomponents.

Attention:UseanalcoholpadtowipethethermalgreaseofftheCPU.

Step10.T oinstallthenewheat-sink:

a.Positionthenewheat-sinkonthemotherboardsothattheninescrewsarealignedwiththe

holesinthemotherboard.

b.Tightenthescrewsinnumericordertosecurethenewheat-sinktothemotherboard.

Step11.Reinstallalltheremovedparts,andthenreconnectallthedisconnectedcables.

Replacingthesystemfan

Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.

Chapter8.Replacinghardware45

Note:Itmaybehelpfultoplacethecomputerface-downonasoftflatsurfaceforthisprocedure.Lenovo
recommendsthatyouuseablanket,towel,orothersoftclothtoprotectthecomputerscreenfromscratches
orotherdamage.

Toreplacethesystemfan

Step1.Removeanymediafromthedrives,shutdowntheoperatingsystem,andturnoffthecomputer

andallattacheddevices.

Step2.Unplugallpowercordsfromelectricaloutlets.

Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)

cables,andanyothercablesthatareconnectedtothecomputer.RefertoLocatingconnectors,
controlsandcomponentstolocatethevariousconnectors.

Step4.Removethestandbase.RefertoRemovingthestandbase.

Step5.Removetherearcover.RefertoRemovingtherearcover.

Step6.Removetheharddiskdrive.RefertoReplacingtheharddiskdrive.

Step7.Removethestandholder.RefertoRemovingthestandholder.

Step8.Removethemiddlecover.RefertoRemovingthemiddlecover.

Step9.RemovetheEMIcover.RefertoRemovingtheEMIcover.

Step10.Removethemountbracket.RefertoRemovingthemountbracket.

Step11.Removethethreescrewsthatsecurethesystemfantothechassis.

Step12.Disconnectthesystemfanpowercablefromthemotherboard.

Step13.Liftthesystemfanuptoremoveit.

Step14.T oinstallthenewsystemfan:

a.Placethenewsystemfanintoposition,andthensecureittothechassiswiththreescrews.

b.Connectthesystemfanpowercabletotheconnectoronthemotherboard.

Step15.Reinstallalltheremovedparts,andthenreconnectallthedisconnectedcables.

46ideacentreAll-In-One720ComputerHardwareMaintenanceManual

Replacingthemotherboard

Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.

Note:Itmaybehelpfultoplacethecomputerface-downonasoftflatsurfaceforthisprocedure.Lenovo

recommendsthatyouuseablanket,towel,orothersoftclothtoprotectthecomputerscreenfromscratches
orotherdamage.

Toreplacethemotherboard:

Step1.Removeanymediafromthedrives,shutdowntheoperatingsystem,andturnoffthecomputer

andallattacheddevices.

Step2.Unplugallpowercordsfromelectricaloutlets.

Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)

cables,andanyothercablesthatareconnectedtothecomputer.RefertoLocatingconnectors,
controlsandcomponentstolocatethevariousconnectors.

Step4.Removethestandbase.RefertoRemovingthestandbase.

Step5.Removetherearcover.RefertoRemovingtherearcover.

Step6.Removetheharddiskdrive.RefertoReplacingtheharddiskdrive.

Step7.Removethestandholder.RefertoRemovingthestandholder.

Step8.Removethemiddlecover.RefertoRemovingthemiddlecover.

Step9.RemovetheEMIcover.RefertoRemovingtheEMIcover.

Step10.Removethemountbracket.RefertoRemovingthemountbracket.

Step11.Removethesystemfan.RefertoReplacingthesystemfan.

Step12.Removethememorymodules.RefertoReplacingthememorymodule.

Step13.Removetheheat-sink.RefertoReplacingtheheat-sink.

Step14.RemovetheWi-Ficard.RefertoReplacingtheWi-Ficard.

Step15.Removeallthecablesfromthemotherboard.

Chapter8.Replacinghardware47

Step16.Removethesixscrewsthatsecurethemotherboardtothechassis,andthenliftthemotherboard

uptoremoveit.

Step17.T oinstallthenewmotherboard:

a.Alignthescrewholesinthenewmotherboardwiththecorrespondingholesinthechassis.

b.Securethenewmotherboardtothechassiswithsixscrews.

c.Connectallthecablestothenewmotherboard.

Step18.Reinstallalltheremovedparts,andthenreconnectallthedisconnectedcables.

ReplacingtheLCDpanelmodule

Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.

Note:Itmaybehelpfultoplacethecomputerface-downonasoftflatsurfaceforthisprocedure.Lenovo

recommendsthatyouuseablanket,towel,orothersoftclothtoprotectthecomputerscreenfromscratches
orotherdamage.

ToreplacetheLCDpanelmodule:

Step1.Removeanymediafromthedrives,shutdowntheoperatingsystem,andturnoffthecomputer

andallattacheddevices.

Step2.Unplugallpowercordsfromelectricaloutlets.

Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)

cables,andanyothercablesthatareconnectedtothecomputer.RefertoLocatingconnectors,
controlsandcomponentstolocatethevariousconnectors.

Step4.Removethestandbase.RefertoRemovingthestandbase.

Step5.Removetherearcover.RefertoRemovingtherearcover.

Step6.Removetheharddiskdrive.RefertoReplacingtheharddiskdrive.

Step7.Removethestandholder.RefertoRemovingthestandholder.

48ideacentreAll-In-One720ComputerHardwareMaintenanceManual

Step8.Removethemiddlecover.RefertoRemovingthemiddlecover.

Step9.RemovetheEMIcover.RefertoRemovingtheEMIcover.

Step10.Removethepowerswitchboard.RefertoReplacingthepowerswitchboard.

Step11.Removethemountbracket.RefertoRemovingthemountbracket.

Step12.Removethesystemfan.RefertoReplacingthesystemfan.

Step13.Removethecameramodule.RefertoReplacingthecamera.

Step14.Removetheheat-sink.RefertoReplacingtheheat-sink.

Step15.Removethepowersupplyunit.RefertoReplacingthepowersupplyunit.

Step16.DisconnecttheLVDScablefromtheLCDpanel.

Step17.Ifyourdeviceisatouchcomputer,disconnectthetouchcablefromthetouchpanelconnector

onthemotherboard.Otherwise,skipthisstep.RefertoLocatingconnectors,controlsand
componentstolocatethetouchconnector.

Step18.Removethemotherboard.RefertoReplacingthemotherboard.

Step19.RemovethescrewsthatsecurethemainbracketandframeassemblytotheLCDpanel.

Chapter8.Replacinghardware49

Step20.LiftupthemainbracketandframeassemblyasshowntoseparatethemfromtheLCDpanel.

Step21.T oinstallthenewtheLCDpanelmodule:

a.AlignthenewLCDpanelwiththemainbracketandframeassembly.

b.SecurethenewLCDpaneltothemainbracketandframeassemblywithscrews.

c.Connectthetouch(touchmodelonly)andLVDScablestotheconnectorsinthenewLCD

panel.

Step22.Reinstallalltheremovedparts,andthenreconnectallthedisconnectedcables.

50ideacentreAll-In-One720ComputerHardwareMaintenanceManual

Chapter9.Generalinformation

Thischapterprovidesgeneralinformationthatappliestoallcomputermodelscoveredbythismanual.

AdditionalServiceInformation

Thischapterprovidesadditionalinformationthattheservicerepresentativemightfindhelpful.

Powermanagement

Powermanagementreducesthepowerconsumptionofcertaincomponentsofthecomputersuchasthe
systempowersupply,processor,harddiskdrives,andsomemonitors.

Advancedconfigurationandpowerinterface(ACPI)BIOS

AsthiscomputerhasanACPIBIOSsystem,theoperatingsystemisallowedtocontrolthepower
managementfeaturesofthecomputerandthesettingsforAdvancedPowerManagement(APM)BIOSmode
isignored.NotalloperatingsystemssupportACPIBIOSmode.

AutomaticPower-Onfeatures

TheAutomaticPower-OnfeatureswithinthePowerManagementmenuallowyoutoenableanddisable
featuresthatturnonthecomputerautomatically.

•WakeUponAlarm:Youcanspecifyadateandtimeatwhichthecomputerwillbeturnedonautomatically.
Thiscanbeeitherasingleevent,adailyeventoraweeklyevent.

•WakeUponLAN:ThisfeatureallowsLANadaptercardtowaketheSystem.

©CopyrightLenovo2016

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