Lenovo Ideacentre A720 Hmm 20120531 User Manual Idea Centre Hardware Maintenance (English) All In One (ideacentre)

Lenovo-Personal-Computer-A720-Users-Manual-330461 lenovo-personal-computer-a720-users-manual-330461

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2012-06-06

User Manual: Lenovo Ideacentre A720 Hmm 20120531 Lenovo IdeaCentre A720 Hardware Maintenance Manual (English) A720 All-in-One (ideacentre) A720 All-in-One (ideacentre)

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IdeaCentreA720
HardwareMaintenanceManual
ideaideaideaCentreidea
IdeaCentreA720
HardwareMaintenanceManual
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
Specications................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....29
Generalinformation.............29
Replacingthekeyboardandmouse......30
Replacingthepowercordorpoweradapter...30
Removingthebasecover..........31
Replacingtheharddiskdrive.........32
Replacingamemorymodule.........34
Replacingthesystemfan..........34
Replacingtheheat-sink...........35
ReplacingtheCPU.............36
Replacingtheopticaldrive..........38
Replacingthesolidstatedisk.........40
Replacingtheopticaldriveejectboard.....40
Replacingthemotherboard..........41
Replacingthespeakersystem........43
ReplacingtheTVtunercard.........45
Replacingthebattery............46
Removingthehingefromthechassis......47
Removingtherearcover...........49
Replacingthescalarboard..........50
Replacingthetouchcontrolboard.......52
Replacingtheconverterboard........53
Replacingthepowerswitchboard.......54
ReplacingtheBluetoothmodule........55
ReplacingtheWLANcard..........56
Replacingthecamera............57
Replacingthefrontfunctionboard.......58
ReplacingtheLEDpanel...........59
FRUlists.................61
Chapter9.Generalinformation....69
AdditionalServiceInformation........69
©CopyrightLenovo2012iii
ivIdeaCentreA720HardwareMaintenanceManual
Chapter1.Aboutthismanual
ThismanualcontainsserviceandreferenceinformationforIdeaCentreA720computerslistedonthecover.
ItisintendedonlyfortrainedservicerswhoarefamiliarwithLenovocomputerproducts.
BeforeservicingaLenovoproduct,besuretoreadtheSafetyInformation.
ThedescriptionoftheTV-tunercardinthismanualappliesonlytocomputerswithaTV-tunercardinstalled.
ItdoesnotapplytocomputerswithoutaTV-tunercard.
ImportantSafetyInformation
BesuretoreadallCAUTIONandDANGERsectionsinthismanualbeforefollowinganyoftheinstructions.
VeuillezliretouteslesconsignesdetypeDANGERetATTENTIONduprésentdocumentavantd’exécuter
lesinstructions.
LesenSieunbedingtalleHinweisevomTyp“ACHTUNG”oder“VORSICHT”indieserDokumentation,bevor
SieirgendwelcheVorgängedurchführen
LeggereleistruzioniintrodottedaATTENZIONEePERICOLOpresentinelmanualeprimadieseguireuna
qualsiasidelleistruzioni
Certique-sedelertodasasinstruçõesdecuidadoeperigonestemanualantesdeexecutarqualquer
umadasinstruções
Esimportantequeleatodaslasdeclaracionesdeprecauciónydepeligrodeestemanualantesdeseguir
lasinstrucciones.
©CopyrightLenovo20121
2IdeaCentreA720HardwareMaintenanceManual
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.
•Inserttheendsofyournecktieorscarfinsideclothingorfastenitwithanonconductiveclip,approximately
8centimeters(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
otherwiseintheinstallationandcongurationprocedures.
©CopyrightLenovo20123
Observethefollowingruleswhenworkingonelectricalequipment.
Important:Useonlyapprovedtoolsandtestequipment.Somehandtoolshavehandlescoveredwithasoft
materialthatdoesnotinsulateyouwhenworkingwithliveelectricalcurrents.Manycustomershaverubber
oormatsneartheirequipmentthatcontainsmallconductiveberstodecreaseelectrostaticdischarge.
•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
metaloorstripsandmachineframes.
Observethespecialsafetyprecautionswhenyouworkwithveryhighvoltages;theseinstructionsarein
thesafetysectionsofthemaintenanceinformation.Useextremecarewhenmeasuringhighvoltages.
•Regularlyinspectandmaintainyourelectricalhandtoolstoensuretheyaresafetouse.
•Donotusewornorbrokentoolsandtesters.
•Neverassumethatpowerhasbeendisconnectedfromacircuit.First,checkthatithasbeenpoweredoff.
•Alwayslookcarefullyforpossiblehazardsinyourworkarea.Examplesofthesehazardsarewetoors,
non-groundedpowerextensioncables,conditionsthatmaycauseorallowpowersurges,andmissing
safetygrounds.
•Donottouchliveelectricalcircuitswiththereectivesurfaceofaplasticdentalmirror.Thissurfaceis
conductive,andtouchingalivecircuitcancausepersonalinjuryanddamagetothecomputer.
•Donotservicethefollowingpartswiththepoweronwhentheyareremovedfromtheirnormaloperating
positionsinacomputer:
–Powersupplyunits
–Pumps
–Blowersandfans
–Motorgenerators
andsimilarunits.(Thispracticeensurescorrectgroundingoftheunits.)
•Ifanelectricalaccidentoccurs:
–Usecaution;donotbecomeavictimyourself.
4IdeaCentreA720HardwareMaintenanceManual
–Switchoffpower.
–Sendanotherpersontogetmedicalaid.
Safetyinspectionguide
Theintentofthisinspectionguideistoassistyouinidentifyingpotentialhazardsposedbytheseproducts.
Eachcomputer,asitwasdesignedandbuilt,hadrequiredsafetyitemsinstalledtoprotectusersand
servicepersonnelfrominjury.Thisguideaddressesonlythoseitems.However,goodjudgmentshouldbe
usedtoidentifypotentialsafetyhazardsduetoattachmentoffeaturesoroptionsnotcoveredbythis
inspectionguide.
Ifanyhazardsarepresent,youmustdeterminehowserioustheapparenthazardcouldbeandwhetheryou
cancontinuewithoutrstresolvingtheproblem.
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.Thepowercordshouldbetheappropriatetypeasspeciedinthepartslistings.
c.Insulationmustnotbefrayedorworn.
4.Removethecover.
5.Checkforanyobviousalterations.Usegoodjudgmentastothesafetyofanyalterations.
6.Checkinsidetheunitforanyobvioushazards,suchasmetallings,contamination,waterorother
liquids,orsignsofreorsmokedamage.
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-specicESDprocedureswhentheyexceedtherequirementsnotedhere.
2.MakesurethattheESDprotectivedevicesyouusehavebeencertied(ISO9000)asfullyeffective.
WhenhandlingESD-sensitiveparts:
Chapter2.Safetyinformation5
•Keepthepartsinprotectivepackagesuntiltheyareinsertedintotheproduct.
•Avoidcontactwithotherpeoplewhilehandlingthepart.
•Wearagroundedwriststrapagainstyourskintoeliminatestaticonyourbody.
•Preventthepartfromtouchingyourclothing.Mostclothingisinsulativeandretainsachargeevenwhen
youarewearingawriststrap.
•Usetheblacksideofagroundedworkmattoprovideastatic-freeworksurface.Thematisespecially
usefulwhenhandlingESD-sensitivedevices.
•Selectagroundingsystem,suchasthoselistedbelow,toprovideprotectionthatmeetsthespecic
servicerequirement.
Note:TheuseofagroundingsystemisdesirablebutnotrequiredtoprotectagainstESDdamage.
–AttachtheESDgroundcliptoanyframeground,groundbraid,orgreen-wireground.
–UseanESDcommongroundorreferencepointwhenworkingonadouble-insulatedor
battery-operatedsystem.Youcanusecoaxorconnector-outsideshellsonthesesystems.
–Usetheroundground-prongoftheACplugonAC-operatedcomputers.
Groundingrequirements
Electricalgroundingofthecomputerisrequiredforoperatorsafetyandcorrectsystemfunction.Proper
groundingoftheelectricaloutletcanbeveriedbyacertiedelectrician.
Safetynotices
TheCAUTIONandDANGERsafetynoticesinthissectionareprovidedinthethelanguageofEnglish.
DANGER
Electricalcurrentfrompower,telephoneandcommunicationcablesishazardous.
Toavoidashockhazard:
•Donotconnectordisconnectanycablesorperforminstallation,maintenance,orreconguration
ofthisproductduringanelectricalstorm.
•Connectallpowercordstoaproperlywiredandgroundedelectricaloutlet.
•Connectanyequipmentthatwillbeattachedtothisproducttoaproperlywiredoutlet.
•Whenpossible,useonehandonlytoconnectordisconnectsignalcables.
•Neverturnonanyequipmentwhenthereisevidenceofre,water,orstructuraldamage.
•Disconnecttheattachedpowercords,telecommunicationscables,networkcables,andmodem
cablesbeforeyouopenthedevicecovers,unlessinstructedotherwiseintheinstallationand
congurationprocedures.
•Connectanddisconnectcablesasdescribedinthefollowingtablewheninstalling,moving,or
openingcoversonthisproductorattacheddevices.
6IdeaCentreA720HardwareMaintenanceManual
ToConnectToDisconnect
1.TurneverythingOFF.
2.First,attachallcablestodevices.
3.Attachsignalcablestoconnectors.
4.Attachpowercordstooutlet.
5.TurndeviceON.
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,beropticdevices,ortransmitters)are
installed,notethefollowing:
•Donotremovethecovers.Removingthecoversofthelaserproductcouldresultinexposureto
hazardouslaserradiation.Therearenoserviceablepartsinsidethedevice.
•Useofcontrolsoradjustmentsorperformanceofproceduresotherthanthosespeciedherein
mightresultinhazardousradiationexposure.
DANGER
SomelaserproductscontainanembeddedClass3AorClass3Blaserdiode.Notethefollowing:
Thesediodesemitradiationwhenopen.Donotstareintothebeam,donotviewdirectlywith
opticalinstruments,andavoiddirectexposuretothebeam.
Chapter2.Safetyinformation7
≥18kg(37lbs)≥32kg(70.5lbs)≥55kg(121.2lbs)
CAUTION:
Usesafepracticeswhenlifting.
CAUTION:
Thepowercontrolbuttononthedeviceandthepowerswitchonthepowersupplydonotturnoff
theelectricalcurrentsuppliedtothedevice.Thedevicealsomighthavemorethanonepower
cord.Toremoveallelectricalcurrentfromthedevice,ensurethatallpowercordsaredisconnected
fromthepowersource.
1
2
CAUTION:
Donotplaceanyobjectweighingmorethan82kg(180lbs.)ontopofrack-mounteddevices.
8IdeaCentreA720HardwareMaintenanceManual
Chapter3.Generalinformation
Thischapterprovidesgeneralinformationthatappliestoallcomputermodelscoveredbythismanual.
Specications
Thissectionliststhephysicalspecicationsforyourcomputer.
Thissectionliststhephysicalspecicationsforyourcomputer.
TypeIdeaCentreA720
Thissectionliststhephysicalspecications.
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
©CopyrightLenovo20129
10IdeaCentreA720HardwareMaintenanceManual
Chapter4.GeneralCheckout
Attention:Thedrivesinthecomputeryouareservicingmighthavebeenrearrangedorthedrivestartup
sequencemayhavebeenchanged.Beextremelycarefulduringwriteoperationssuchascopying,saving,or
formatting.Dataorprogramscanbeoverwrittenifyouselectanincorrectdrive.
Generalerrormessagesappearifaproblemorconictisfoundbyanapplication,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.
©CopyrightLenovo201211
12IdeaCentreA720HardwareMaintenanceManual
Chapter5.UsingtheSetupUtility
TheSetupUtilityprogramisusedtoviewandchangethecongurationsettingsofyourcomputer,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
SystemcongurationoptionsarelistedintheLenovoBIOSSetupUtilityprogrammenu.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.
•Usesomethingsignicantlydifferentfromyourpreviouspassword.
Attention:AdministratorandPower-Onpasswordsarenotcasesensitive.
©CopyrightLenovo201213
AdministratorPassword
SettinganAdministratorPassworddetersunauthorizedpersonsfromchangingcongurationsettings.You
mightwanttosetanAdministratorPasswordifyouareresponsibleformaintainingthesettingsofseveral
computers.
AfteryousetanAdministratorPassword,apasswordpromptisdisplayedeverytimeyouaccesstheLenovo
BIOSSetupUtilityprogram.
IfboththeAdministratorandPower-OnPasswordareset,youcantypeeitherpassword.However,youmust
useyourAdministratorPasswordtochangeanycongurationsettings.
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-typethepasswordtoconrm,thenpresstheEnterkey.Ifyoutypedthepasswordcorrectly,
thepasswordwillbeinstalled.
TochangeanAdministratorPassword,dothefollowing:
1.StarttheLenovoBIOSSetupUtilityprogram(see“StartingtheLenovoBIOSSetupUtilityprogram”on
page13).
2.FromtheSecuritymenu,selectSetAdministratorPasswordandpresstheEnterkey.
3.Thepassworddialogboxwillbedisplayed.TypethecurrentpasswordthenpresstheEnterkey.
4.Typethenewpassword,thenpresstheEnterkey.Re-typethepasswordtoconrmthenewpassword.
Ifyoutypedthenewpasswordcorrectly,thenewpasswordwillbeinstalled.ASetupNoticedconrming
thatchangeshavebeensavedwillbedisplayed.
TodeleteapreviouslysetAdministratorPassword,dothefollowing:
1.FromtheSecuritymenu,selectSetAdministratorPasswordandpresstheEnterkey.
2.Thepassworddialogboxwillbedisplayed.T ypethecurrentpasswordandpresstheEnterkey.
3.TodeleteanAdministratorPassword,leaveeachnewpasswordlineitemblank,thenpresstheEnter
key.ASetupNoticeconrmingthatchangeshavebeensavedwillbedisplayed.
4.ReturntotheLenovoBIOSSetupUtilityprogrammenuandselecttheExitoption.
5.SelectSavechangesandExitfromthemenu.
Power-OnPassword
WhenaPower-OnPasswordisset,youcannotstarttheLenovoBIOSSetupUtilityprogramuntilavalid
passwordistypedfromthekeyboard.
Setting,changing,ordeletingaPower-OnPassword
Note:Apasswordcanbeanycombinationoflettersandnumbersupto16characters(a-zand0-9).
14IdeaCentreA720HardwareMaintenanceManual
TosetaPower-OnPassword,dothefollowing:
1.StarttheLenovoBIOSSetupUtilityprogram(See”StartingtheLenovoBIOSSetupUtilityprogram”on
page13.)
2.FromtheSecuritymenu,selectSetPower-OnPasswordandpresstheEnterkey.
3.Thepassworddialogboxwillbedisplayed.Typethepassword,thenpresstheEnterkey.
4.Re-typethepasswordtoconrm.Ifyoutypedthepasswordcorrectly,thepasswordwillbeinstalled.
TochangeaPower-OnPassword,dothefollowing:
1.StarttheLenovoBIOSSetupUtilityprogram(See”StartingtheLenovoBIOSSetupUtilityprogram”on
page13.)
2.FromtheSecuritymenu,selectSetPower-OnPasswordandpresstheEnterkey.
3.Thepassworddialogboxwillbedisplayed.TypethecurrentpasswordthenpresstheEnterkey.
4.Typethenewpassword,thenpresstheEnterkey.Re-typethepasswordtoconrmthenewpassword.
Ifyoutypedthenewpasswordcorrectly,thenewpasswordwillbeinstalled.ASetupNoticedconrming
thatchangeshavebeensavedwillbedisplayed.
TodeleteapreviouslysetPower-OnPassword,dothefollowing:
1.FromtheSecuritymenu,selectSetPower-OnPasswordandpresstheEnterkey.
2.Thepassworddialogboxwillbedisplayed.T ypethecurrentpasswordandpresstheEnterkey.
3.TodeletethePower-OnPassword,leaveeachnewpasswordlineitemblank,thenpressEnter.ASetup
Noticeconrmingthatchangeshavebeensavedwillbedisplayed.
4.ReturntotheLenovoBIOSSetupUtilityprogrammenuandselecttheExitoption.
5.SelectSavechangesandExitfromthemenu.
Enablingordisablingadevice
TheDevicesoptionsisusedtoenableordisableuseraccesstothefollowingdevices:
USBFunctionsSelectwhethertoenableordisableUSB(UniversalSerial
Bus)functions.Ifthefunctionsaredisabled,noUSB
devicescanbeused.
SATAModeWhenthisfeatureissettoDisabled,alldevices
connectedtotheSATAconnectors(e.g.harddiskdrives
ortheopticaldiskdrive)aredisabledandcannotbe
accessed.
OnboardAudioControllerSelectwhethertoenableordisabletheOnboard
AudioController.WhenthisfeatureissettoDisabled
alldevicesconnectedtotheaudioconnectors(e.g.
headphonesoramicrophone)aredisabledandcannot
beused.
OnboardEthernetControllerorLANBootAgentSelectwhethertoenableordisabletheOnboardEthernet
Controller,orselectwhethertoenableordisableload
onboardPXE(PrebootExecutionEnvironment).
Toenableordisableadevice,dothefollowing:
1.StarttheSetupUtilityprogram(see“StartingtheSetupUtilityprogram”onpage13).
2.FromtheSetupUtilityprogrammenu,selectDevices.
3.Selectanoptionasfollows:
SelectUSBSetup,presstheEnterkey,thenselectUSBFunctions.
Chapter5.UsingtheSetupUtility15
SelectATADeviceSetup,presstheEnterkey,thenselectSATAMode.
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.Turnoffyourcomputer.
2.PressandholdtheF12keythenturnonthecomputer.WhentheStartupDeviceMenuappears,
releasetheF12key.
Note:IftheStartupDeviceMenudoesnotdisplayusingthesesteps,repeatedlypressandreleasethe
F12keyratherthankeepingitpressedwhenturningonthecomputer.
3.Use↑and↓arrowstoselectthedesiredstartupdevicefromtheStartupDeviceMenuandpress
theEnterkeytobegin.
Note:SelectingastartupdevicefromtheStartupDeviceMenudoesnotpermanentlychangethe
startupsequence.
Selectingorchangingthestartupdevicesequence
Tovieworpermanentlychangetheconguredstartupdevicesequence,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:
16IdeaCentreA720HardwareMaintenanceManual
a.Ifyoudonotwanttosavethesettings,selectDiscardchangesandExitfromthemenu.
b.Ifyouhavechangedthesesettingsandwanttoreturntothedefaultsettings,selectLoadOptimal
Defaultsfromthemenu.
ExitingtheLenovoBIOSSetupUtilityprogram
Afteryounishviewingorchangingsettings,presstheEsckeytoreturntotheLenovoBIOSSetupUtility
programmainmenu.YoumighthavetopresstheEsckeyseveraltimes.Dooneofthefollowing:
•Ifyouwanttosavethenewsettings,selectSavechangesandExitfromthemenu.WhentheSave&
resetwindowshows,selecttheY esbutton,andthenpresstheEnterkeytoexittheLenovoBIOS
SetupUtilityprogram.
•Ifyoudonotwanttosavethesettings,selectDiscardchangesandExitfromthemenu.Whenthe
ResetWithoutSavingwindowshows,selecttheYesbutton,andthenpresstheEnterkeytoexitthe
LenovoBIOSSetupUtilityprogram.
Chapter5.UsingtheSetupUtility17
18IdeaCentreA720HardwareMaintenanceManual
Chapter6.Symptom-to-FRUIndex
TheSymptom-to-FRUindexlistserrorsymptomsandpossiblecauses.Themostlikelycauseislistedrst.
AlwaysbeginwithChapter4,“GeneralCheckout,”onpage11.Thisindexcanalsobeusedtohelpyou
decidewhichFRUstohaveavailablewhenservicingacomputer.Ifyouareunabletocorrecttheproblem
usingthisindex,goto“Undeterminedproblems”onpage20.
Notes:
•Ifyouhavebothanerrormessageandanincorrectaudioresponse,diagnosetheerrormessagerst.
•Ifyoucannotrunthediagnostictestsoryougetadiagnosticerrorcodewhenrunningatestbutdid
receiveaPOSTerrormessage,diagnosethePOSTerrormessagerst.
•Ifyoudidnotreceiveanyerrormessagelookforadescriptionofyourerrorsymptomsintherstpartof
thisindex.
Harddiskdrivebooterror
Aharddiskdrivebooterrorcanbecausedbythefollowing.
ErrorFRU/Action
Thestartupdriveisnotincludedinthebootsequence
conguration.
Checkthecongurationandensurethestartupdriveis
inthebootsequence.
Nooperatingsystemisinstalledonthebootdrive.Installanoperatingsystemonthebootdrive.
Thebootsectoronthestartupdriveiscorrupted.Thedrivemustbeformatted.Dothefollowing:
1.Attempttobackupthedataonthefailingharddisk
drive.
2.Usetheoperatingsystemtoformattheharddisk
drive.
Thedriveisdefective.Replacetheharddiskdrive.
PowerSupplyProblems
Followtheseproceduresifyoususpectthereisapowersupplyproblem.
Check/VerifyFRU/Action
Checkthatthefollowingareproperlyinstalled:
•PowerCord
•On/OffSwitchconnector
•SystemBoardPowerSupplyconnectors
•Microprocessorconnections
Reseatconnectors
Checkthepowercord.PowerCord
Checkthepower-onswitch.Power-onSwitch
©CopyrightLenovo201219
POSTerrorcodes
Eachtimeyouturnthecomputeron,itperformsaseriesofteststocheckthatthesystemisoperating
correctlyandthatcertainoptionsareset.ThisseriesoftestsiscalledthePower-OnSelf-Test,orPOST.
POSTdoesthefollowing:
•Checkssomebasicmotherboardoperations
•Checksthatthememoryisworkingcorrectly
•Startsvideooperations
•Veriesthatthebootdriveisworking
POSTErrorMessageDescription/Action
KeyboarderrorCannotinitializethekeyboard.Makesurethekeyboard
isproperlyconnectedtothecomputerandthatnokeys
areheldpressedduringPOST.Topurposelycongure
thecomputerwithoutakeyboard,selectKeyboardless
operationinStartupandsettheoptiontoEnabled.The
BIOSthenignoresthemissingkeyboardduringPOST.
RebootandSelectproperBootdeviceorInsertBoot
MediainselectedBootdevice
TheBIOSwasunabletondasuitablebootdevice.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.Repeatsteps1through3untilyoundthefailingdeviceorcomponent.
Ifalldevicesandcomponentshavebeenremovedandtheproblemcontinues,replacethesystemboard.
20IdeaCentreA720HardwareMaintenanceManual
Chapter7.Locatingconnectors,controlsandcomponents
Thissectionprovidesillustrationstohelplocatethevariousconnectors,controlsandcomponentsofthe
computer.
Fontview
Thefollowingillustrationshowsthelocationofcontrolsandcomponentsonthefrontofthecomputer.
Attention:Becarefulnottoblockanyairventsonthecomputer.Blockedairventscancauseoverheating.
12
3765489
101112131415
1.Built-inmicrophone9.MonitorOn/Off
2.Built-incamera10.PCmode/HDMI-in/AV-inswitch
3.Powerindicator11.NovoVisionbutton
4.Harddiskdriveindicator12.Volumedown
5.Bluetoothstatusindicator13.Volumeup
6.WIFIstatusindicator14.Brightnessdown
7.HDMI-inindicator15.Brightnessup
8.Built-inspeakers
©CopyrightLenovo201221
Leftandrightview
Thefollowingillustrationshowsthelocationofconnectors,controlsandcomponentsontheleftandright
sideofthecomputer.
234685
9
10
71
1.Airvents6.Opticaldrive
2.USB3.0connector7.B-CAScardslot(Japanmodelsonly)
3.HDMI-inconnector(selectedmodelsonly)8.Memorycardreader
4.HDMI-outconnector9.Powerbutton
5.Ejectbutton10.Anti-scratchprotector
Attention:Donotinsert3-inchdiscsintotheopticaldrive.
22IdeaCentreA720HardwareMaintenanceManual
Rearview
Thefollowingillustrationshowsthelocationofconnectorsandcomponentsontherearofthecomputer.
12387645
1.TVtunerconnector(selectedmodelsonly)5.USB2.0connectors(2)
2.Headphoneconnector6.Powerconnector
3.Microphoneconnector7.Ethernetconnector(RJ45)
4.USB3.0connector8.Securitycableslot
Chapter7.Locatingconnectors,controlsandcomponents23
Hardwarecomponents
Thefollowingillustrationshowsthecomponentsthatmakeupyourcomputer.
4567
9
10
11
12
13
14
15
16
17
18
19
20
21
8
23
24
25
26
27
28
29
30
31
22
1.Systemfan17.Bluetoothmodule
2.Scalarboard18.Powerswitchboard
3.Harddiskdrivebracket19.Frontfunctionboard
4.Harddiskdrive20.Battery
5.Harddiskdriverubbers21.Solidstatedisk
6.CPU22.TV-tunercard
7.Basecover23.Glass
8.Opticaldrive24.Panelframe
9.Opticaldrivebracket25.LEDpanel
10.Motherboard26.Middleframe
11.Chassis27.Rearcover
12.Speakers28.Rearcoverdeco
13.Hinge29.Touchcontrolboard
14.Opticaldriveejectboard30.Converter
15.Camera31.Heat-sink
16.WLANcard
24IdeaCentreA720HardwareMaintenanceManual
Identifyingpartsonthemotherboard
Themotherboard(sometimescalledtheplanarorsystemboard)isthemaincircuitboardinyourcomputer.
Itprovidesbasiccomputingfunctionsandsupportsavarietyofdevicesthatarefactory-installedorthat
youcaninstalllater.Thefollowingillustrationshowsthelocationofconnectorsandcomponentsonthe
frontofthemotherboard.
1.HDMI-outconnector12.TVjack2(Japanonly)
2.HDMI-inconnector13.Cardreader
3.USB3.0connector14.Microphoneconnector
4.Ethernetconnector（RJ45）15.Headphoneconnector
5.Powerconnector16.Opticaldriveejectbuttonconnector
6.Systemfanconnector17.Speakerconnector
7.Scalarcableconnector18.Opticaldriveconnector
8.Scalarcableconnector19.Solidstatediskconnector
9.USB2.0connectors(2)20.Harddiskdriveconnector
10.USB3.0connector21.Memoryslot
11.TVjack122.CPUsocket
Chapter7.Locatingconnectors,controlsandcomponents25
Thefollowingillustrationshowsthelocationofconnectorsandcomponentsonthebackofthemotherboard.
23.TV-Tunercardconnector24.Battery
26IdeaCentreA720HardwareMaintenanceManual
IdentifyingpartsonthebackoftheLEDpanel
ThefollowingillustrationshowsthecomponentsandcontrolsonthebackofLEDpanel.
123
4
5678
1.Bluetoothmodule5.Frontfunctionboard
2.WLANcard6.Converterboard
3.Camera7.Scalarboard
4.Touchcontrolboard8.Powerswitchboard
Chapter7.Locatingconnectors,controlsandcomponents27
28IdeaCentreA720HardwareMaintenanceManual
Chapter8.Replacinghardware
Attention:Donotremovethecomputercoverorattemptanyrepairbeforereadingthe“Importantsafetyinformation”
intheSafetyandWarrantyGuidethatwasincludedwithyourcomputer.ToobtaincopiesoftheSafetyandWarranty
Guide,gototheSupportWebsiteat:http://consumersupport.lenovo.com.
Note:UseonlypartsprovidedbyLenovo.
Generalinformation
Pre-disassemblyinstructions
Beforestartingthedisassemblyprocedure,makesurethatyoudothefollowing:
1.Turnoffthepowertothesystemandallperipherals.
2.Unplugallpowerandsignalcablesfromthecomputer.
3.Placethesystemonaat,stablesurface.
©CopyrightLenovo201229
Replacingthekeyboardandmouse
Attention:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.
Toreplacethekeyboardandmouse
Step1.Removeanymedia(disks,CDs,DVDsormemorycards)fromthedrives,shutdowntheoperating
system,andturnoffthecomputerandallattacheddevices.
Step2.Unplugallpowercordsfromelectricaloutlets.
Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)
cables,andanyothercablesthatareconnectedtothecomputer.Referto“Leftandrightview”
and“Rearview”forhelpwithlocatingthevariousconnectors.
Note:YourkeyboardwillbeconnectedtoaUSBconnectorononesideorattherearofthe
computer.
Step4.Disconnectthedefectivekeyboardcablefromthecomputerandconnectthenewkeyboardcable
tothesameconnector.
Note:Themousecanbereplacedusingthesamemethod.
Replacingthepowercordorpoweradapter
Attention:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.
Toreplacethepowercordandpoweradapter:
Step1.Removeanymedia(disks,CDs,DVDs,ormemorycards)fromthedrives,shutdowntheoperating
system,andturnoffthecomputerandallattacheddevices.
30IdeaCentreA720HardwareMaintenanceManual
Step2.Locatetheconnectorforthepowercord.Referto“Rearview” .
Step3.Disconnectthefailingpowercordandadapterfromthecomputerandconnectthenewpowercord
andadaptertothesameconnector.
Removingthebasecover
Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.
Note:Itmaybehelpfultoplacethecomputerface-downonasoftatsurfaceforthisprocedure.Lenovo
recommendsthatyouuseablanket,towel,orothersoftclothtoprotectthecomputerscreenfromscratches
orotherdamage.
Toremovethebasecover
Step1.Removeanymedia(disks,CDs,DVDs,ormemorycards)fromthedrives,shutdowntheoperating
system,andturnoffthecomputerandallattacheddevices.
Step2.Unplugallpowercordsfromelectricaloutlets.
Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)
cables,andanyothercablesthatareconnectedtothecomputer.Referto“Leftandrightview”
and“Rearview”forhelpwithlocatingthevariousconnectors.
Step4.Placethecomputerface-downonasoftatsurface,thenremovethe7screwsthatsecurethe
basecovertothebase.
Chapter8.Replacinghardware31
Step5.Returnthecomputertoanuprightposition,thenliftthebasecoverupandslideitoutasshown.
Step6.Toreattachthebasecover:
a.Lineupthebasecoverwiththebase,slideitbackandsnapitintoposition.
b.Placethecomputerface-downonasoftatsurface,thensecurethebasecovertothebase
withthe7screws.
Replacingtheharddiskdrive
Attention:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.
Toreplacetheharddiskdrive
Step1.Removeanymedia(disks,CDs,DVDsormemorycards)fromthedrives,shutdowntheoperating
system,andturnoffthecomputerandallattacheddevices.
Step2.Unplugallpowercordsfromelectricaloutlets.
Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)
cables,andanyothercablesthatareconnectedtothecomputer.Referto“Leftandrightview”
and“Rearview”forhelpwithlocatingthevariousconnectors.
Step4.Removethebasecover.Referto“Removingthebasecover” .
32IdeaCentreA720HardwareMaintenanceManual
Step5.Removethe2screwsthatsecuretheharddiskdrivetothemotherboard.1
Step6.Disconnectthedataandpowercablefromtheharddiskdrive.2
1
1
2
Step7.Slidetheharddiskdriveandrubberoutofthebayasshown.
Step8.Detachtherubbersfromtheharddiskdriveasshown.
Step9.Installthenewharddiskdriveasfollows:
a.Attachtherubberstothenewharddiskdrive.
b.Lineupthenewharddiskdriveandslideitbackintotheharddiskdrivebay.
Chapter8.Replacinghardware33
c.Securethenewharddiskdrivetomotherboardwiththe2screws.
d.Connectthedataandpowercabletothenewharddiskdriveandmotherboard.
Step10.Reattachthebasecoverandsecureitwiththescrews.
Replacingamemorymodule
Attention:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.
Toreplaceamemorymodule
Step1.Removeanymedia(disks,CDs,DVDs,ormemorycards)fromthedrives,shutdowntheoperating
system,andturnoffthecomputerandallattacheddevices.
Step2.Unplugallpowercordsfromelectricaloutlets.
Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)
cables,andanyothercablesthatareconnectedtothecomputer.Referto“Leftandrightview”
and“Rearview”forhelpwithlocatingthevariousconnectors.
Step4.Removethebasecover.Referto“Removingthebasecover” .
Step5.Pushoutthelatchesonbothsidesofthememorysockettoreleasethememorymodule.Gently
pullthememorymoduleupwardtoremoveitfromitssocket.
Step6.Alignthenewmemorymodulewiththememorysocket,theninsertitandpushdownonthetop
edge.Makesurethelatcheslockthememorymoduleinplace.
Step7.Reattachthebasecoverandsecureitwiththescrews.
Replacingthesystemfan
Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.
Toreplacethesystemfan
Step1.Removeanymedia(disks,CDs,DVDsormemorycards)fromthedrives,shutdowntheoperating
system,andturnoffthecomputerandallattacheddevices.
Step2.Unplugallpowercordsfromelectricaloutlets.
Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)
cables,andanyothercablesthatareconnectedtothecomputer.Referto“Leftandrightview”
and“Rearview”forhelpwithlocatingthevariousconnectors.
Step4.Removethebasecover.Referto“Removingthebasecover” .
34IdeaCentreA720HardwareMaintenanceManual
Step5.Removethe3screwsthatsecurethesystemfantotheheat-sink.1
Step6.Disconnectthepowercablefromthemotherboard.2
Step7.Liftthesystemfanuptoremoveit.3
1
2
3
Step8.Lineupthenewsystemfan,thensecureittotheheat-sinkandconnectthenewpowercable
tothemotherboard.
Step9.Reattachthebasecoverandsecureitwiththescrews.
Replacingtheheat-sink
Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.
Toreplacetheheat-sink:
Step1.Removeanymedia(disks,CDs,DVDsormemorycards)fromthedrives,shutdowntheoperating
system,andturnoffthecomputerandallattacheddevices.
Step2.Unplugallpowercordsfromelectricaloutlets.
Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)
cables,andanyothercablesthatareconnectedtothecomputer.Referto“Leftandrightview”
and“Rearview”forhelpwithlocatingthevariousconnectors.
Step4.Removethebasecover.Referto“Removingthebasecover” .
Step5.Removethesystemfan.Referto“Replacingthesystemfan” .
Step6.Removethe9screwsthatsecuretheheat-sinktothemotherboard.
Chapter8.Replacinghardware35
Step7.Removetheheat-sinkbyliftingitup.
Attention:Placetheheat-sinkupsidedownonaatsurfacetopreventthermalgreasefromcontaminating
othercomponents.
Attention:Useanalcoholpadtowipethethermalgreaseofftheheat-sinkandCPU.
Step8.Useathermalgreasesyringetoplace5dropsofgreaseonthetopofthemicroprocessor.Each
dropofgreaseshouldbe0.03ml(3tickmarksonthegreasesyringe).
Step9.Lineupthenewheat-sinkthensecureittothemotherboardwiththe9screws.
Step10.Attachthesystemfantothenewheat-sinkandsecureitwiththescrews.
Step11.Reattachthebasecoverandsecureitwiththescrews.
ReplacingtheCPU
Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.
ToreplacetheCPU
Step1.Removeanymedia(disks,CDs,DVDs,ormemorycards)fromthedrives,shutdowntheoperating
system,andturnoffthecomputerandallattacheddevices.
Step2.Unplugallpowercordsfromelectricaloutlets.
Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)
cables,andanyothercablesthatareconnectedtothecomputer.Referto“Leftandrightview”
and“Rearview”forhelpwithlocatingthevariousconnectors.
Step4.Removethebasecover.Referto“Removingthebasecover” .
Step5.Removethesystemfan.Referto“Replacingthesystemfan” .
Step6.Removetheheat-sink.Referto“Replacingtheheat-sink” .
Step7.UseaatheadscrewdrivertoturntheCPUlockscrewcounterclockwisetounlocktheCPU.12
36IdeaCentreA720HardwareMaintenanceManual
Step8.Liftthemicroprocessorstraightupandoutofthesocket.3
12
3
Attention:Donottouchthegoldcontactsonthebottomofthemicroprocessor.Whenhandlingthe
microprocessor,touchonlythesides.
Note:Donotdropanythingontothemicroprocessorsocketwhileitisexposed.Thesocketpinsmust
bekeptascleanaspossible.
Step9.Holdingthesidesofthemicroprocessorwithyourngers,removetheprotectivecover1that
protectsthegoldcontactsonthenewmicroprocessor.2
Step10.Holdingthesidesofthemicroprocessorwithyourngers,positionthemicroprocessorsothatthe
notchesonthemicroprocessorarealignedwiththetabsinthemicroprocessorsocket.
Important:Toavoiddamagingthemicroprocessorcontacts,keepthemicroprocessorcompletelylevel
whileinstallingitintothesocket.
Chapter8.Replacinghardware37
Step11.Lowerthemicroprocessorstraightdownintoitssocketonthemotherboard.
Step12.Tosecurethemicroprocessorinthesocket,closethemicroprocessorretainerandlockitinto
positionwiththesmallhandle.
Step13.Useathermalgreasesyringetoplace5dropsofgreaseonthetopofthemicroprocessor.Each
dropofgreaseshouldbe0.03ml(3tickmarksonthegreasesyringe).
Step14.Reattachthesystemfan,heat-sink,andbasecover,thensecurethemwiththescrews.
Replacingtheopticaldrive
Attention:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.
Toreplacetheopticaldrive
Step1.Removeanymedia(disks,CDs,DVDs,ormemorycards)fromthedrives,shutdowntheoperating
system,andturnoffthecomputerandallattacheddevices.
Step2.Unplugallpowercordsfromelectricaloutlets.
Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)
cables,andanyothercablesthatareconnectedtothecomputer.Referto“Leftandrightview”
and“Rearview”forhelpwithlocatingthevariousconnectors.
Step4.Removethebasecover.Referto“Removingthebasecover” .
Step5.Disconnecttheopticaldrivedatacablefromthemotherboard.
38IdeaCentreA720HardwareMaintenanceManual
Step6.Removethe3screwsthatsecuretheopticaldrivetothemotherboardandliftituptoremoveit.
Step7.Removethe5screwsthatsecuretheopticaldrivetothebracketanddisconnectthedatacable
fromtheopticaldrive.
Step8.Installthenewopticaldriveasfollows:
a.Connectthedatacabletothenewopticaldrive.
b.Alignthenewopticaldrivewiththebracket,pushitintopositionandsecureitwiththe5screws.
c.Lineuptheopticaldrivebracketholeswiththemountingholesinthemotherboardandsecure
itwiththe3screws.
d.Connectthedatacabletothemotherboard.
Step9.Reattachthebasecoverandsecureitwiththescrews.
Chapter8.Replacinghardware39
Replacingthesolidstatedisk
Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.
Toreplacethesolidstatedisk
Step1.Removeanymedia(disks,CDs,DVDs,ormemorycards)fromthedrives,shutdowntheoperating
system,andturnoffthecomputerandallattacheddevices.
Step2.Unplugallpowercordsfromelectricaloutlets.
Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)
cables,andanyothercablesthatareconnectedtothecomputer.Referto“Leftandrightview”
and“Rearview”forhelpwithlocatingthevariousconnectors.
Step4.Removethebasecover.Referto“Removingthebasecover” .
Step5.Removethe2screwsthatsecurethesolidstatedisktothemotherboard.
Step6.Pullthesolidstatediskupwardtoremoveitfromthecardport.
Step7.Toinstallthenewsolidstatedisk:
a.Insertthenotchedendofthenewsolidstatediskintothecardportonthemotherboard.
b.Securethenewsolidstatedisktothemotherboardusingthe2screws.
Step8.Reattachthebasecoverandsecureitwiththescrews.
Replacingtheopticaldriveejectboard
Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.
Toreplacetheopticaldriveejectboard
Step1.Removeanymedia(disks,CDs,DVDs,ormemorycards)fromthedrives,shutdowntheoperating
system,andturnoffthecomputerandallattacheddevices.
Step2.Unplugallpowercordsfromelectricaloutlets.
Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)
cables,andanyothercablesthatareconnectedtothecomputer.Referto“Leftandrightview”
and“Rearview”forhelpwithlocatingthevariousconnectors.
Step4.Removethebasecover.Referto“Removingthebasecover” .
Step5.Removethe2screwsthatsecuretheopticaldriveejectboardtothemotherboard.
40IdeaCentreA720HardwareMaintenanceManual
Step6.Liftuptheopticaldriveejectboardtoremoveit.
Step7.Toinstallthenewopticaldriveejectboard:
a.Connectthenewopticaldriveejectboardtothemotherboard.
b.Securethenewopticaldriveejectboardtothemotherboardwiththe2screws.
Step8.Reattachthebasecoverandsecureitwiththescrews.
Replacingthemotherboard
Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.
Toreplacethemotherboard:
Step1.Removeanymedia(disks,CDs,DVDs,ormemorycards)fromthedrives,shutdowntheoperating
system,andturnoffthecomputerandallattacheddevices.
Step2.Unplugallpowercordsfromelectricaloutlets.
Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)
cables,andanyothercablesthatareconnectedtothecomputer.Referto“Leftandrightview”
and“Rearview”forhelpwithlocatingthevariousconnectors.
Step4.Removethebasecover.Referto“Removingthebasecover” .
Step5.Removetheharddiskdrive.Referto“Replacingtheharddiskdrive” .
Step6.Removeamemorymodule.Referto“Replacingamemorymodule” .
Step7.Removethesystemfan.Referto“Replacingthesystemfan” .
Step8.Removetheheat-sink.Referto“Replacingtheheat-sink” .
Step9.RemovetheCPU.Referto“ReplacingtheCPU” .
Step10.Removetheopticaldrive.Referto“Replacingtheopticaldrive” .
Step11.Removethesolidstatedisk.Referto“Replacingthesolidstatedisk” .
Step12.Removetheopticaldriveejectboard.Referto“Replacingtheopticaldriveejectboard” .
Step13.Removeallthecablesconnectedtothemotherboard.
Chapter8.Replacinghardware41
Step14.Removethe8screwsthatsecurethemotherboardtothechassisandslideitoutasshown.
Step15.Removethe2screwsthatsecuretheTV-Tunercardtothemotherboard.
Step16.Disconnecttheantennacable(s)fromtheTV-Tunercard.
Step17.PulltheTV-Tunercardupwardtoremoveitfromthecardport.
42IdeaCentreA720HardwareMaintenanceManual
Step18.Useaatheadscrewdriverasalevertopriseoutthebatteryasshown.
Step19.Toinstallthenewmotherboard:
a.Insertthebattery(CR2032)intothesocketwiththesidelabeled“+”facingup,andpress
thebatteryintoplace.
b.InsertthenotchedendoftheTV-Tunercardintothecardportonthenewmotherboardand
secureitwiththe2screws.
c.Connecttheantennacable(s)totheTV-Tunercard.
d.Lineupthenewmotherboardwiththechassisandslideitintoposition.Aligntheholeson
thenewmotherboardwiththemountingholesonthechassisandsecureittothechassis
withthescrews.
e.Attachtheopticaldriveejectboard,solidstatedisk,opticaldrive,CPU,heat-sink,systemfan,
memorymodule,harddiskdrivetothenewmotherboard.
f.Connectallthecablestothenewmotherboard.
Step20.Reattachthebasecoverandsecureitwiththescrews.
Replacingthespeakersystem
Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.
Toreplacethespeakersystem:
Step1.Removeanymedia(disks,CDs,DVDs,ormemorycards)fromthedrives,shutdowntheoperating
system,andturnoffthecomputerandallattacheddevices.
Step2.Unplugallpowercordsfromelectricaloutlets.
Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)
cables,andanyothercablesthatareconnectedtothecomputer.Referto“Leftandrightview”
and“Rearview”forhelpwithlocatingthevariousconnectors.
Step4.Removethebasecover.Referto“Removingthebasecover” .
Step5.Removetheharddiskdrive.Referto“Replacingtheharddiskdrive” .
Step6.Removetheheat-sink.Referto“Replacingtheheat-sink” .
Step7.Removetheopticaldrive.Referto“Replacingtheopticaldrive” .
Step8.Removethehingefromthechassis.Referto“Removingthehingefromthechassis” .
Step9.Disconnectthespeakercablefromtheconnectorsonthemotherboard.
Chapter8.Replacinghardware43
Step10.Removethe8screwsthatsecurethemotherboardtothechassisandslideitoutasshown.
Step11.Removethe4screwsthatsecurethespeakersystemtothemotherboard.
Step12.Detachthespeakerfromthechassis.
Step13.Toinstallthenewspeakersystem:
a.Attachthenewspeakercabletothechassis.
b.Lineupthemotherboardwiththechassisandslideitintoposition.Aligntheholesonthe
motherboardwiththemountingholesonthechassisandsecureittothechassiswiththe
8screws.
c.Lineupthenewspeakersystemwiththemotherboardandsecureitwiththe4screws.
d.Connectthenewspeakercabletothemotherboard.
Step14.Reattachtheopticaldrive,heat-sink,andharddiskdrivetothemotherboard.
Step15.Reattachthehingetothechassis,andreconnectthetouchandLEDpanelcablestothe
motherboard.
Step16.Reattachthebasecoverandsecureitwiththescrews.
44IdeaCentreA720HardwareMaintenanceManual
ReplacingtheTVtunercard
Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.
ToreplacetheTVtunercard
Step1.Removeanymedia(disks,CDs,DVDs,ormemorycards)fromthedrives,shutdowntheoperating
system,andturnoffthecomputerandallattacheddevices.
Step2.Unplugallpowercordsfromelectricaloutlets.
Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)
cables,andanyothercablesthatareconnectedtothecomputer.Referto“Leftandrightview”
and“Rearview”forhelpwithlocatingthevariousconnectors.
Step4.Removethebasecover.Referto“Removingthebasecover” .
Step5.Removetheharddiskdrive.Referto“Replacingtheharddiskdrive” .
Step6.Removetheheat-sink.Referto“Replacingtheheat-sink” .
Step7.Removetheopticaldrive.Referto“Replacingtheopticaldrive” .
Step8.Removethehingefromthechassis.Referto“Removingthehingefromthechassis” .
Step9.Removeallthecablesconnectedtothemotherboard.
Step10.Removethe8screwsthatsecurethemotherboardtothechassisandslideitoutasshown.
Step11.Removethe2screwsthatsecuretheTV-Tunercardtothemotherboard.
Step12.Disconnecttheantennacable(s)fromtheTV-Tunercard.
Chapter8.Replacinghardware45
Step13.PulltheTV-Tunercardupwardtoremoveitfromthecardportonthemotherboard.
Step14.ToinstallthenewTV-Tunercard:
a.InsertthenotchedendoftheTV-Tunercardintothecardportonthemotherboard.
b.SecurenewtheTV-Tunercardtothemotherboardwiththe2screws.
c.Connecttheantennacable(s)tothenewTV-Tunercard.
Step15.Lineupmotherboardwiththechassisandslideitintoposition.Aligntheholesonthemotherboard
withthemountingholesonthechassisandsecureittothechassiswiththescrews.
Step16.Reattachtheopticaldrive,heat-sink,andharddiskdrivetothemotherboard.
Step17.Reattachthehingetothechassis,andreconnectthetouchandLEDpanelcablestothe
motherboard.
Step18.Reconnectallthecablesbacktothemotherboard.
Step19.Reattachthebasecoverandsecureitwiththescrews.
Replacingthebattery
Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.
Toreplacethebattery
Step1.Removeanymedia(disks,CDs,DVDs,ormemorycards)fromthedrives,shutdowntheoperating
system,andturnoffthecomputerandallattacheddevices.
Step2.Unplugallpowercordsfromelectricaloutlets.
Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)
cables,andanyothercablesthatareconnectedtothecomputer.Referto“Leftandrightview”
and“Rearview”forhelpwithlocatingthevariousconnectors.
Step4.Removethebasecover.Referto“Removingthebasecover” .
Step5.Removetheharddiskdrive.Referto“Replacingtheharddiskdrive” .
Step6.Removetheheat-sink.Referto“Replacingtheheat-sink” .
Step7.Removetheopticaldrive.Referto“Replacingtheopticaldrive” .
Step8.Removethehingefromthechassis.Referto“Removingthehingefromthechassis” .
Step9.Removeallthecablesconnectedtothemotherboard.
46IdeaCentreA720HardwareMaintenanceManual
Step10.Removethe8screwsthatsecurethemotherboardtothechassisandslideitoutasshown.
Step11.Useaatheadscrewdriverasalevertopriseoutthebatteryasshown.
Step12.Toinstallthenewbattery:
a.Insertthenewbattery(CR2032)intothesocketwiththesidelabeled“+”facingup,andpress
thebatteryintoplace.
Step13.Lineupthemotherboardwiththechassisandslideitintoposition.Aligntheholesonthe
motherboardwiththemountingholesonthechassisandsecureittothechassiswiththescrews.
Step14.Reattachtheopticaldrive,heat-sink,andharddiskdrivetothemotherboard.
Step15.Reattachthehingetothechassis,andreconnectthetouchandLEDpanelcablestothe
motherboard.
Step16.Reconnectallthecablesbacktothemotherboard.
Step17.Reattachthebasecoverandsecureitwiththescrews.
Removingthehingefromthechassis
Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.
Toremovethehingefromthechassis
Chapter8.Replacinghardware47
Step1.Removeanymedia(disks,CDs,DVDs,ormemorycards)fromthedrives,shutdowntheoperating
system,andturnoffthecomputerandallattacheddevices.
Step2.Unplugallpowercordsfromelectricaloutlets.
Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)
cables,andanyothercablesthatareconnectedtothecomputer.Referto“Leftandrightview”
and“Rearview”forhelpwithlocatingthevariousconnectors.
Step4.Removethebasecover.Referto“Removingthebasecover” .
Step5.DisconnectthetouchandLEDpanelcablesfromtheconnectorsonthemotherboard.
Step6.Removethe6screwsthatsecurethehingetothechassis1,thenraisethehingetoremoveit
fromthechassis.2
1
2
Step7.Toreattachthehingetothechassis:
a.Lineupthehingewiththechassisandslidethehingeintoposition.
b.Securethehingetothechassiswiththe6screws.
c.ReconnectthetouchandLEDpanelcablestothemotherboard.
48IdeaCentreA720HardwareMaintenanceManual
Step8.Reattachthebasecoverandsecureitwiththescrews.
Removingtherearcover
Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.
Toremovetherearcover
Step1.Removeanymedia(disks,CDs,DVDs,ormemorycards)fromthedrives,shutdowntheoperating
system,andturnoffthecomputerandallattacheddevices.
Step2.Unplugallpowercordsfromelectricaloutlets.
Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)
cables,andanyothercablesthatareconnectedtothecomputer.Referto“Leftandrightview”
and“Rearview”forhelpwithlocatingthevariousconnectors.
Step4.Removethebasecover.Referto“Removingthebasecover” .
Step5.Removethehingefromthechassis.Referto“Removingthehingefromthechassis” .
Step6.Raisethehinge1andslidethereardecooutasshown.2
1
2
Chapter8.Replacinghardware49
Step7.Puttheheadofaatheadscrewdriverbetweenthemiddleframeandtherearcoverasshown.
Thenusingthescrewdriverasaleverandthemiddleframemetalbarasthefulcrum,prisetherear
coverawayfromthemiddleframe.1
Fulcrum
Le ve r
1
Step8.Workingaroundtheedgeinananti-clockwisedirection,useyourngerstopriseuptherearcover.
Therearcoverispinnedintoplace,useshort,sharpmovementstopriseitup.2
2
Step9.Pressdownthehingeandslideouttherearcover.
Step10.Toreattachtherearcover:
a.Raisethehinge,lineuptherearcoverwiththeLEDpanelandslideitbackintoposition.
b.PresstheedgeofrearcovertolockthecovertotheLEDpanelwiththepins.
c.Slidethereardecobackintoposition.
Step11.Reattachthehingetothechassis,andreconnectthetouchandLEDpanelcablesbacktothe
motherboard.
Step12.Reattachthebasecoverandsecureitwiththescrews.
Replacingthescalarboard
Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.
Toreplacethescalarboard
Step1.Removeanymedia(disks,CDs,DVDs,ormemorycards)fromthedrives,shutdowntheoperating
system,andturnoffthecomputerandallattacheddevices.
Step2.Unplugallpowercordsfromelectricaloutlets.
Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)
cables,andanyothercablesthatareconnectedtothecomputer.Referto“Leftandrightview”
and“Rearview”forhelpwithlocatingthevariousconnectors.
Step4.Removethebasecover.Referto“Removingthebasecover” .
Step5.Removethehingefromthechassis.Referto“Removingthehingefromthechassis” .
Step6.Removetherearcover.Referto“Removingtherearcover” .
Step7.Removethe3screwsthatsecurethescalarshieldingtothemiddleframe.
50IdeaCentreA720HardwareMaintenanceManual
Step8.Removethescalarshieldingandsetitaside.
Step9.Disconnectallthecablesfromthescalarboard.
Step10.Removethe5screwsthatsecurethescalarboardtothemiddleframeandliftituptoremoveit.
WLAN
Ca me ra
Conve rte r
To uch control
S ca la r
HDMI/DVI
LE D/CIR
LVDS
MMB
P owe r
Blu e too th
Step11.Toinstallthenewscalarboard:
Chapter8.Replacinghardware51
a.Lineuptheholesonthenewscalarboardwiththemountingholesonthemiddleframeand
secureitwiththe5screws.
b.Connectallthecablestothenewscalarboard.
c.Reattachthescalarshieldingtothemiddleframewiththe3screws.
Step12.ReattachtherearcovertotheLEDpanel.
Step13.Reattachthehingetothechassis,andreconnectthetouchandLEDpanelcablesbacktothe
motherboard.
Step14.Reattachthebasecoverandsecureitwiththescrews.
Replacingthetouchcontrolboard
Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.
Toreplacethetouchcontrolboard:
Step1.Removeanymedia(disks,CDs,DVDs,ormemorycards)fromthedrives,shutdowntheoperating
system,andturnoffthecomputerandallattacheddevices.
Step2.Unplugallpowercordsfromelectricaloutlets.
Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)
cables,andanyothercablesthatareconnectedtothecomputer.Referto“Leftandrightview”
and“Rearview”forhelpwithlocatingthevariousconnectors.
Step4.Removethebasecover.Referto“Removingthebasecover” .
Step5.Removethehingefromthechassis.Referto“Removingthehingefromthechassis” .
Step6.Removetherearcover.Referto“Removingtherearcover” .
Step7.Disconnectallthetouchcablesfromthetouchcontrolboard.
Step8.Removethe2screwsthatsecurethetouchcontrolboardtothemiddleframe.
Step9.Liftupthetouchcontrolboardtoremoveit.
Step10.Toinstallthenewtouchcontrolboard:
52IdeaCentreA720HardwareMaintenanceManual
a.Lineuptheholesonthenewtouchcontrolboardwiththemountingholesonthemiddleframe
andsecureitwiththe2screws.
b.Connectallthecablestothenewtouchcontrolboard.
Step11.ReattachtherearcovertotheLEDpanel.
Step12.Reattachthehingetothechassis,andreconnectthetouchandLEDpanelcablestothe
motherboard.
Step13.Reattachthebasecoverandsecureitwiththescrews.
Replacingtheconverterboard
Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.
Toreplacetheconverterboard:
Step1.Removeanymedia(disks,CDs,DVDs,ormemorycards)fromthedrives,shutdowntheoperating
system,andturnoffthecomputerandallattacheddevices.
Step2.Unplugallpowercordsfromelectricaloutlets.
Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)
cables,andanyothercablesthatareconnectedtothecomputer.Referto“Leftandrightview”
and“Rearview”forhelpwithlocatingthevariousconnectors.
Step4.Removethebasecover.Referto“Removingthebasecover” .
Step5.Removethehingefromthechassis.Referto“Removingthehingefromthechassis” .
Step6.Removetherearcover.Referto“Removingtherearcover” .
Step7.Removethe4screwsthatsecuretheconverterboardtothemiddleframe.1
Step8.Disconnectthe2cablesfromtheconverterboard.2
Step9.Liftuptheconverterboardtoremoveit.
1
1
1
1
2
2
Chapter8.Replacinghardware53
Step10.Toinstallthenewconverterboard:
a.Lineuptheholesonthenewconverterboardwiththemountingholesonthemiddleframe
andsecureitwiththe4screws.
b.Connectthe2cablestothenewconverterboard.
Step11.ReattachtherearcovertotheLEDpanel.
Step12.Reattachthehingetothechassis,andreconnectthetouchandLEDpanelcablestothe
motherboard.
Step13.Reattachthebasecoverandsecureitwiththescrews.
Replacingthepowerswitchboard
Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.
Toreplacethepowerswitchboard
Step1.Removeanymedia(disks,CDs,DVDs,ormemorycards)fromthedrives,shutdowntheoperating
system,andturnoffthecomputerandallattacheddevices.
Step2.Unplugallpowercordsfromelectricaloutlets.
Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)
cables,andanyothercablesthatareconnectedtothecomputer.Referto“Leftandrightview”
and“Rearview”forhelpwithlocatingthevariousconnectors.
Step4.Removethebasecover.Referto“Removingthebasecover” .
Step5.Removethehingefromthechassis.Referto“Removingthehingefromthechassis” .
Step6.Removetherearcover.Referto“Removingtherearcover” .
Step7.Disconnectthepowercablefromthepowerswitchboard.
54IdeaCentreA720HardwareMaintenanceManual
Step8.RemovethescrewthatsecuresthepowerswitchboardtotheLEDpanelandliftupthepower
switchboardtoremoveit.
Step9.Toinstallthepowerswitchboard:
a.LineuptheholeonthenewpowerswitchboardwiththemountingholeontheLEDpaneland
secureitwiththescrew.
b.Connectthepowercabletothenewconverterboard.
Step10.ReattachtherearcovertotheLEDpanel.
Step11.Reattachthehingetothechassis,andreconnectthetouchandLEDpanelcablestothe
motherboard.
Step12.Reattachthebasecoverandsecureitwiththescrews.
ReplacingtheBluetoothmodule
Attention:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.
ToreplacetheBluetoothmodule:
Step1.Removeanymedia(disks,CDs,DVDs,ormemorycards)fromthedrives,shutdowntheoperating
system,andturnoffthecomputerandallattacheddevices.
Step2.Unplugallpowercordsfromelectricaloutlets.
Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)
cables,andanyothercablesthatareconnectedtothecomputer.Referto“Leftandrightview”
and“Rearview”forhelpwithlocatingthevariousconnectors.
Step4.Removethebasecover.Referto“Removingthebasecover” .
Step5.Removethehingefromthechassis.Referto“Removingthehingefromthechassis” .
Chapter8.Replacinghardware55
Step6.Removetherearcover.Referto“Removingtherearcover” .
Step7.UseasmallatheadscrewdrivertoprisetheBluetoothmoduleawayfromthesocket.12
Step8.DisconnectthecablefromtheBluetoothmodule.3
1
2
3
Step9.ToinstallthenewBluetoothmodule:
a.ConnectthecabletothenewBluetoothmodule.
b.LineupthenewBluetoothmodulewiththesocket,snapitintopositionandsecureitwith
thepins.
Step10.ReattachtherearcovertotheLEDpanel.
Step11.Reattachthehingetothechassis,andreconnectthetouchandLEDpanelcablestothe
motherboard.
Step12.Reattachthebasecoverandsecureitwiththescrews.
ReplacingtheWLANcard
Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.
ToreplacetheWLANcard:
Step1.Removeanymedia(disks,CDs,DVDs,ormemorycards)fromthedrives,shutdowntheoperating
system,andturnoffthecomputerandallattacheddevices.
Step2.Unplugallpowercordsfromelectricaloutlets.
Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)
cables,andanyothercablesthatareconnectedtothecomputer.Referto“Leftandrightview”
and“Rearview”forhelpwithlocatingthevariousconnectors.
Step4.Removethebasecover.Referto“Removingthebasecover” .
Step5.Removethehingefromthechassis.Referto“Removingthehingefromthechassis” .
Step6.Removetherearcover.Referto“Removingtherearcover” .
Step7.UseasmallatheadscrewdrivertoprisetheWLANcardawayfromthesocket.12
Step8.Disconnecttheantennacable3anddatacablefromtheWLANcard.4
56IdeaCentreA720HardwareMaintenanceManual
Step9.LiftuptheWLANcardtoremoveitfromthesocket.
1
1
1
1
2
4
3
Step10.ToinstallthenewWLANcard:
a.ConnectthedatacabletothenewWLANcard.
b.LineupthenewWLANcardwiththesocket,snapitintopositionandsecureitwiththepins.
c.ConnecttheantennacabletothenewWLANcard.
Step11.ReattachtherearcovertotheLEDpanel.
Step12.Reattachthehingetothechassis,andreconnectthetouchandLEDpanelcablestothe
motherboard.
Step13.Reattachthebasecoverandsecureitwiththescrews.
Replacingthecamera
Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.
Toreplacethecamera:
Step1.Removeanymedia(disks,CDs,DVDs,ormemorycards)fromthedrives,shutdowntheoperating
system,andturnoffthecomputerandallattacheddevices.
Step2.Unplugallpowercordsfromelectricaloutlets.
Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)
cables,andanyothercablesthatareconnectedtothecomputer.Referto“Leftandrightview”
and“Rearview”forhelpwithlocatingthevariousconnectors.
Step4.Removethebasecover.Referto“Removingthebasecover” .
Step5.Removethehingefromthechassis.Referto“Removingthehingefromthechassis” .
Step6.Removetherearcover.Referto“Removingtherearcover” .
Step7.Removethe2screwsthatsecurethecameratothefrontbezel.1
Chapter8.Replacinghardware57
Step8.Liftupthecamera2anddisconnectthedatacablefromthecamera.3
1
2
3
1
Step9.Toinstallthenewcamera:
a.Connectthedatacabletothenewcamera.
b.Lineuptheholesinthenewcamerawiththemountingholesonthefrontbezelandsecure
itwiththe2screws.
Step10.ReattachtherearcovertotheLEDpanel.
Step11.Reattachthehingetothechassis,andreconnectthetouchandLEDpanelcablestothe
motherboard.
Step12.Reattachthebasecoverandsecureitwiththescrews.
Replacingthefrontfunctionboard
Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.
Toreplacethefrontfunctionboard:
Step1.Removeanymedia(disks,CDs,DVDs,ormemorycards)fromthedrives,shutdowntheoperating
system,andturnoffthecomputerandallattacheddevices.
Step2.Unplugallpowercordsfromelectricaloutlets.
Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)
cables,andanyothercablesthatareconnectedtothecomputer.Referto“Leftandrightview”
and“Rearview”forhelpwithlocatingthevariousconnectors.
Step4.Removethebasecover.Referto“Removingthebasecover” .
Step5.Removethehingefromthechassis.Referto“Removingthehingefromthechassis” .
Step6.Removetherearcover.Referto“Removingtherearcover” .
Step7.Removethe2screwsthatsecurethefrontfunctionboardtothefrontbezel.1
Step8.Disconnectthedatacablefromthefrontfunctionboard.2
58IdeaCentreA720HardwareMaintenanceManual
Step9.Liftupthefrontfunctionboardtoremoveitfromthefrontbezel.3
3
1
2
1
Step10.Toinstallthenewfrontfunctionboard:
a.Connectthedatacabletothenewfrontfunctionboard.
b.Lineuptheholesinthenewfrontfunctionboardwiththemountingholesonthefrontbezel
andsecureitwiththe2screws.
Step11.ReattachtherearcovertotheLEDpanel.
Step12.Reattachthehingetothechassis,andreconnectthetouchandLEDpanelcablestothe
motherboard.
Step13.Reattachthebasecoverandsecureitwiththescrews.
ReplacingtheLEDpanel
Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.
Note:Itmaybehelpfultoplacethecomputerface-downonasoftatsurfaceforthisprocedure.Lenovo
recommendsthatyouuseablanket,towel,orothersoftclothtoprotectthecomputerscreenfromscratches
orotherdamage.
ToreplacetheLEDpanel:
Step1.Removeanymedia(disks,CDs,DVDs,ormemorycards)fromthedrives,shutdowntheoperating
system,andturnoffthecomputerandallattacheddevices.
Step2.Unplugallpowercordsfromelectricaloutlets.
Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)
cables,andanyothercablesthatareconnectedtothecomputer.Referto“Leftandrightview”
and“Rearview”forhelpwithlocatingthevariousconnectors.
Step4.Removethebasecover.Referto“Removingthebasecover” .
Step5.Removethehingefromthechassis.Referto“Removingthehingefromthechassis” .
Step6.Removetherearcover.Referto“Removingtherearcover” .
Chapter8.Replacinghardware59
Step7.Removethescalarboard.Referto“Replacingthescalarboard” .
Step8.Removethetouchcontrolboard.Referto“Replacingthetouchcontrolboard” .
Step9.Removetheconverterboard.Referto“Replacingtheconverterboard” .
Step10.Removethepowerswitchboard.Referto“Replacingthepowerswitchboard” .
Step11.RemovetheBluetoothmodule.Referto“ReplacingtheBluetoothmodule” .
Step12.RemovetheWLANcard.Referto“ReplacingtheWLANcard” .
Step13.RemovetheWLANantennacablefromthefrontbezel.
Step14.Removethecamera.Referto“Replacingthecamera” .
Step15.Removethefrontfunctionboard.Referto“Replacingthefrontfunctionboard” .
Step16.Removeallthecablesattachedtothemiddleframeandthefrontbezel.
60IdeaCentreA720HardwareMaintenanceManual
Step17.Removethe6screwsthatsecurethehingetothemiddleframeandsetthehingeaside.
Step18.ToinstallthenewtheLEDpanel:
a.Lineuptheholesonthehingewiththemountingholesonthenewmiddleframeandsecureit
with6screws.
b.AttachallthecablestothenewLEDpanelmiddleframeandfrontbezel.
c.AttachtheWLANcard,Bluetoothmodule,powerswitchboard,converterboard,touchcontrol
board,scalarboardandfrontfunctionboardtothenewLEDpanelmiddleframeandconnect
allthecablestothenewLEDpanel.
Step19.ReattachtherearcovertotheLEDpanel.
Step20.Reattachthehingetothechassis,andreconnectthetouchandLEDpanelcablestothe
motherboard.
Step21.Reattachthebasecoverandsecureitwiththescrews.
FRUlists
Thischapterliststheinformationontheeldreplaceableunits(FRUs).
Attention:BesuretoreadandunderstandallthesafetyinformationbeforereplacinganyFRUs.
Notes:FRUsthathavea1or2intheCRUcolumnareCustomerReplaceableUnits(CRUs).
•1–identiespartsthatarefairlysimpletoreplace,requiringfewornotools.
•2–identiespartsthatareslightlymoredifculttoreplace.
•N-identiespartsthatarenottobereplacedbythecustomer.
Chapter8.Replacinghardware61
4567
9
10
11
12
13
14
15
16
17
18
19
20
21
8
23
24
25
26
27
28
29
30
31
22
Item#FRUsServicePartNumber(FRU
#)
CRUID
Motherboard
A7201G_DDR3W/HDINW/TV1MB90000165N
A7202G_DDR3W/HDINW/TV1MB90000166N
A7201G_DDR3W/HDINW/OTVMB90000167N
A7202G_DDR3W/HDINW/OTVMB90000168N
A7201G_DDR3W/OHDINW/OTV1MB90000169N
A7202G_DDR3W/OHDINW/OTV1MB90000170N
IntelPPTC1HM76Chipset1100364N
CPU
IntelI3-3110M2.4GL13M2cPGAProcessor102500303N
IntelI5-3210M2.5GL13M2cPGAProcessor102500301N
IntelI5-3320M2.6GL13M2cPGAProcessor102500299N
IntelI5-3360M2.8GL13M2cPGAProcessor102500297N
IntelI7-3820QM2.7GE16M4cPGAProcessor102500304N
IntelI7-3720QM2.6GE16M4cPGAProcessor102500306N
IntelI7-3612QM2.1GE16M4cPGAProcessor102500290N
IntelI7-3610QM2.3GE16M4cPGAProcessor102500289N
IntelSNBI3-2330M2.2G3MJ1PGA102500017N
LAN
RealtekRTL8111F73040793N
10
62IdeaCentreA720HardwareMaintenanceManual
AudioN
RealtekALC272-VA473040715N
Memory
M471B5773DH0-CK01-100226N
HMT325S6CFR8C-PB1-100227N
MT8KTF25664HZ-1G6M11-100228N
Elp_RJ2108BDBG-GN-F2GBD3-1600SMEMORY1-100425N
M471B5273DH0-CK01-100230N
HMT351S6CFR8C-PB1-100231N
Elp_RJ2108BDBG-GN-F4GBD3-1600SMEMORY1-100426N
MT16KTF51264HZ-1G6M11-100232N
Harddiskdrive
SeagateST9500325AS500G9NBHDD16-004189N
WDWD5000BPVT-24HXZ5400RPM500GHDD9.5mm4ksector16004846N
WDWD5000BPVT-24A1YT05400PRM9.5mm500HDD16-200089N
WDWD7500BPVT-24HXZ5400RPM750GHDD16-004848N
WDWD7500BPVT-24A1YT05400PRM9.5mm750HDD16200088N
WDWD10JPVT-24A1YT05400PRM9.5mm1THDD16200071N
A720HDDCable90200731N
4
A720HDDBracket90200753N
Solidstatedisk
SamsungMZMPA064HMDR64GmSATASSD16-005084N
21
SamsungPM83016200109N
Opticaldiskdrive
HLDSCA30NBDCombo-LH（BE）25-200325N
PLDSDL-4ETS12.7mmSlimSATASlotloadBDCombo25008493N
PLDSDC-6E2SHBDCombo-LH（BE）25-200326N
SONYOptiarcAD-7800SlotRambo25-203881N
8
HLDSGA31NSlimSATASlotDVDRW25-009580N
A720ODDCable90200732N
14A720ODDEJECTBOARD90000217N
9A720ODDBracket90200752N
Graphics
N13P-GL-AIO-A1GT630M1100400N
VRAM
H5TQ1G63DFR-11C1007418N
K4W1G1646G-BC111007420N
K4W2G1646C-HC111007156N
H5TQ2G63DFR-11CDDR32GRAM　1100323N
10
K4W2G1646E-HC11DDR32GRAM1100321N
Chapter8.Replacinghardware63
PowerSupply
FSP150-RAB150Wadapter®36-0018761
LietonPA-1151-11VA150wadapter(R)36-0018751
Heat-sink
A720CoolMasterDIS45WHeatSink90200583N
31
A720AVCDIS45WHeatSink90201255N
Systemfan
A720DeltaDIS45WFan90200584N
1
A720AVCDIS45WFan90201256N
WLANcard
A720WlanCardW/CABLE90000171N
16
A720WlanAnntena90200739N
TV- Tunercard
AvermediaH339BBDVB-TMiniTVCard11200290N
AvermediaH339BAATSCMiniTVCard11200291N
DVB-T,ATSCHybridMC90711-013387N
YUANM270BMiniTVCard(R)11012147N
AverMediaH339ISDB-TMiniTVCard®11012854N
DMB-T(HK)Hybrid:MC163M11-011447N
YUANMC182AAnalogminiTVCard®11012280N
A720TVTunnerCableForNTSL90201142N
22
A720TVTunnerCableForPAL90201143N
Remotecontrol
PhilipsWin7IR43KeyController(R)8880106611
PhilipsWin7IRReveiver(R)8880106621
Bluetoothmodule
FcnBCM92070BT2.1EDRFlashDTCard®11200978N
USIBCM92070BT2.1EDRFlashDTCard®11200979N
17
A720BluetoothCardCable90200741N
Camera
QuantaH264720POV9712CAM20200089N
15
A720WebcamCable90200740N
Speakers
12A720Speaker(L+R)90200743N
Converter
A720Converter90000215N
30
A720ConverterCable90200737N
64IdeaCentreA720HardwareMaintenanceManual
Touchcontrolboard
Mastouch27"PCTtouchpanelwin873041906N
AUOM270HW02V3Ultra-slimMVA-LED18200174N
A720MastouchTouchModule90400015N
A7203MLCDTouchModule90400016N
A720LCDFrontBezel90200748N
A720MastouchMainFrameStand90200749N
A7203MMainFrameStand90200750N
29
A720TOUCHCable90200733N
Keyboard
LiteonSK-8861(TW)S-SilkKB-Silver（WW）902005392
LiteonSK-8861(TH)S-SilkKB-Silver（WW）902005402
LiteonSK-8861(BE)S-SilkKB-Silver（WW）902005412
LiteonSK-8861(DE)S-SilkKB-Silver（WW）902005422
LiteonSK-8861(GB)S-SilkKB-Silver（WW）902005432
LiteonSK-8861(IL)S-SilkKB-Silver（WW）902005442
LiteonSK-8861(IT)S-SilkKB-Silver（WW）902005452
LiteonSK-8861(IS)S-SilkKB-Silver（WW）902005462
LiteonSK-8861(Nordic)S-SilkKB-Silver（WW）902005472
LiteonSK-8861(NL)S-SilkKB-Silver（WW）902005482
LiteonSK-8861(EN-FR)S-SilkKB-Silver（WW）902005492
LiteonSK-8861(US)S-SilkKB-Silver（WW）902005502
LiteonSK-8861(PT)S-SilkKB-Silver（WW）902005512
LiteonSK-8861(FR)S-SilkKB-Silver（WW）902005522
LiteonSK-8861(ES)S-SilkKB-Silver（WW）902005532
LiteonSK-8861(JP)S-SilkKB-Silver（WW）902005542
LiteonSK-8861(US-IN)S-SilkKB-Silver（WW）902005552
LiteonSK-8861(SA)S-SilkKB-Silver（WW）902005562
LiteonSK-8861(BR)S-SilkKB-Silver（WW）902005572
LiteonSK-8861(CS-SK)S-SilkKB-Silver（WW）902005582
LiteonSK-8861(GR)S-SilkKB-Silver（WW）902005592
LiteonSK-8861(KR)S-SilkKB-Silver（WW）902005602
LiteonSK-8861(LA)S-SilkKB-Silver（WW）902005612
LiteonSK-8861(RU)S-SilkKB-Silver（WW）902005622
LiteonSK-8861(US-EU)S-SilkKB-Silver（WW）902005632
LiteonSK-8861(SL)S-SilkKB-Silver（WW）902005642
LiteonSK-8861(BG)S-SilkKB-Silver（WW）902005652
LiteonSK-8861(HU)S-SilkKB-Silver（WW）902005662
LiteonSK-8861(TR)S-SilkKB-Silver（WW）902005672
LiteonSK-8861(US-MY)S-SilkKB-Silver（WW）902005682
Chapter8.Replacinghardware65
LiteonSK-8861(LA-AR)S-SilkKB-Silver（WW）902005692
Mouse
LiteonSM-8861(WW)MouseSilver（WW）902005702
LiteonSM-8861Mouse(MY)Silver（WW）902005712
LiteonSM-8861Mouse(NoBattery)Silver（WW）902005722
LiteonSM-8861(JP)Mouse-Silver(WW)902007812
Powercords
Volex1.0mC5USPowerCable310338581
longwellBlackSingle-end1.0mSAAPowerCable310353971
Volex1.0mC5AustrilianPowerCable310495001
Luxshare1.0mC5AustrilianPowerCable310495201
1.0MC5JPNpowercordwithconverter®31038887linecord
+310396553pin2pin
converter
1
Volex1.0mC5JapanPowerCable310495061
Luxshare1.0mC5JapanPowerCable310495191
GrandsunBlackSingle-end1.0m3wireCCCPowerCable(R)310329531
Luxshare1.0MC5CCCPowerCable310451471
longwellBlackSingle-end1.0mASTAPowerCable310353961
Volex1.0mC5UKPowerCable310494961
longwellBlackSingle-end1.0mVDEPowerCable310353321
Volex1.0mC5EuropePowerCable310494971
Luxshare1.0mC5EuropePowerCable310495181
longwellBlackSingle-end1.0mIndiaPowerCable310353951
LongwellBlackSingle-end1.0mItalyC5PowerCable®310391041
Volex1.0mC5ItalyPowerCable310495041
LongwellBlackSingle-end1.0mBrazilPowerCable®310358281
Volex1.0mC5BrazilPowerCable310495051
LongwellBlackSingle-end1.0mArgentinaC5PowerCable®310391001
Volex1.0mC5USPowerCable310495071
LongwellBlackSingle-end1.0mDenmarkC5PowerCable®310391011
Volex1.0mC5DenmarkPowerCable310495031
LongwellBlackSingle-end1.0mSwitzerlandC5PowerCable®310391031
Volex1.0mC5SwitzerlandPowerCable310495081
LongwellBlackSingle-end1.0mIsraelC5PowerCable®310391071
Volex1.0mC5IsraelPowerCable310495021
LongwellBlackSingle-end1.0mTaiwanC5PowerCable®310388851
Volex1.0mC5TaiwanPowerCable310494991
LongwellBlackSingle-end1.0mKoreaC5PowerCable®310391061
Volex1.0mC5KoreaPowerCable310494981
66IdeaCentreA720HardwareMaintenanceManual
LongwellBlackSingle-end1.0mSAC5PowerCable®310391051
Volex1.0mC5SAPowerCable310495011
Mechanical
A720BaseCoverW/BCASW/TV2W/HDMI90200744N
A720BaseCoverW/OBCASW/OTV2W/HDMI90200745N
A720BaseCoverW/OBCASW/OTV2W/OHDMI90200746N
7
A720BaseCoverW/OBCASW/OTVW/HDMI90200747N
18A720PowerBoard90000214N
19A720LEDFunctionBoard90000216N
2A720ScalarBoard90000218N
A720PANELBACKLIGHTCABLE90200734N
A720PowerSwitchCable90200735N
A720LVDSCable90200736N
A720LEDFunctionBoardCable90200738N
A720MMBCable90200742N
27A720BackCover90200751N
28A720RearDeco90200754N
A720ScalarEMIShielding90201154N
A720BaseBottomAssy90201155N
Chapter8.Replacinghardware67
68IdeaCentreA720HardwareMaintenanceManual
Chapter9.Generalinformation
Thischapterprovidesgeneralinformationthatappliestoallcomputermodelscoveredbythismanual.
AdditionalServiceInformation
Thischapterprovidesadditionalinformationthattheservicerepresentativemightndhelpful.
Powermanagement
Powermanagementreducesthepowerconsumptionofcertaincomponentsofthecomputersuchasthe
systempowersupply,processor,harddiskdrives,andsomemonitors.
Advancedcongurationandpowerinterface(ACPI)BIOS
AsthiscomputerhasanACPIBIOSsystem,theoperatingsystemisallowedtocontrolthepower
managementfeaturesofthecomputerandthesettingsforAdvancedPowerManagement(APM)BIOSmode
isignored.NotalloperatingsystemssupportACPIBIOSmode.
AutomaticPower-Onfeatures
TheAutomaticPower-OnfeatureswithinthePowerManagementmenuallowyoutoenableanddisable
featuresthatturnonthecomputerautomatically.
•WakeUponAlarm:Youcanspecifyadateandtimeatwhichthecomputerwillbeturnedonautomatically.
Thiscanbeeitherasingleevent,adailyeventoraweeklyevent.
•WakeUponLAN:ThisfeatureallowsLANadaptercardtowaketheSystem.
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