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Lenovo A720 User Manual

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Page 1
IdeaCentreA720
ideaideaideaCentreidea
HardwareMaintenanceManual
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IdeaCentreA720 HardwareMaintenanceManual
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Contents
Chapter1.Aboutthismanual......1
ImportantSafetyInformation..........1
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
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
Chapter8.Replacinghardware....29
©CopyrightLenovo2012
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Chapter1.Aboutthismanual

ThismanualcontainsserviceandreferenceinformationforIdeaCentreA720computerslistedonthecover. ItisintendedonlyfortrainedservicerswhoarefamiliarwithLenovocomputerproducts.
BeforeservicingaLenovoproduct,besuretoreadtheSafetyInformation.
ThedescriptionoftheTV-tunercardinthismanualappliesonlytocomputerswithaTV-tunercardinstalled. ItdoesnotapplytocomputerswithoutaTV-tunercard.

ImportantSafetyInformation

BesuretoreadallCAUTIONandDANGERsectionsinthismanualbeforefollowinganyoftheinstructions.
VeuillezliretouteslesconsignesdetypeDANGERetATTENTIONduprésentdocumentavantd’exécuter lesinstructions.
LesenSieunbedingtalleHinweisevomT yp“ACHTUNG”oder“VORSICHT”indieserDokumentation,bevor SieirgendwelcheVorgängedurchführen
LeggereleistruzioniintrodottedaA TTENZIONEePERICOLOpresentinelmanualeprimadieseguireuna qualsiasidelleistruzioni
Certique-sedelertodasasinstruçõesdecuidadoeperigonestemanualantesdeexecutarqualquer umadasinstruções
Esimportantequeleatodaslasdeclaracionesdeprecauciónydepeligrodeestemanualantesdeseguir lasinstrucciones.
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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.T oavoid personalinjuryorequipmentdamage,disconnectanyattachedpowercords,telecommunication cables,networkcables,andmodemcablesbeforeyouopenthecomputercovers,unlessinstructed otherwiseintheinstallationandcongurationprocedures.
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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.
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–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:
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•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.
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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,beropticdevices,ortransmitters)are installed,notethefollowing:
•Donotremovethecovers.Removingthecoversofthelaserproductcouldresultinexposureto hazardouslaserradiation.Therearenoserviceablepartsinsidethedevice.
•Useofcontrolsoradjustmentsorperformanceofproceduresotherthanthosespeciedherein mightresultinhazardousradiationexposure.
DANGER
SomelaserproductscontainanembeddedClass3AorClass3Blaserdiode.Notethefollowing:
Thesediodesemitradiationwhenopen.Donotstareintothebeam,donotviewdirectlywith opticalinstruments,andavoiddirectexposuretothebeam.
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≥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.
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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
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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.
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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.
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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.T ypethepasswordthenpresstheEnterkey.
4.Re-typethepasswordtoconrm,thenpresstheEnterkey.Ifyoutypedthepasswordcorrectly, thepasswordwillbeinstalled.
TochangeanAdministratorPassword,dothefollowing:
1.StarttheLenovoBIOSSetupUtilityprogram(see“StartingtheLenovoBIOSSetupUtilityprogram”on page13).
2.FromtheSecuritymenu,selectSetAdministratorPasswordandpresstheEnterkey.
3.Thepassworddialogboxwillbedisplayed.TypethecurrentpasswordthenpresstheEnterkey.
4.T ypethenewpassword,thenpresstheEnterkey.Re-typethepasswordtoconrmthenewpassword. Ifyoutypedthenewpasswordcorrectly,thenewpasswordwillbeinstalled.ASetupNoticedconrming thatchangeshavebeensavedwillbedisplayed.
TodeleteapreviouslysetAdministratorPassword,dothefollowing:
1.FromtheSecuritymenu,selectSetAdministratorPasswordandpresstheEnterkey.
2.Thepassworddialogboxwillbedisplayed.TypethecurrentpasswordandpresstheEnterkey.
3.T odeleteanAdministratorPassword,leaveeachnewpasswordlineitemblank,thenpresstheEnter key.ASetupNoticeconrmingthatchangeshavebeensavedwillbedisplayed.
4.ReturntotheLenovoBIOSSetupUtilityprogrammenuandselecttheExitoption.
5.SelectSavechangesandExitfromthemenu.
Power-OnPassword
WhenaPower-OnPasswordisset,youcannotstarttheLenovoBIOSSetupUtilityprogramuntilavalid passwordistypedfromthekeyboard.
Setting,changing,ordeletingaPower-OnPassword
Note:Apasswordcanbeanycombinationoflettersandnumbersupto16characters(a-zand0-9).
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TosetaPower-OnPassword,dothefollowing:
1.StarttheLenovoBIOSSetupUtilityprogram(See”StartingtheLenovoBIOSSetupUtilityprogram”on page13.)
2.FromtheSecuritymenu,selectSetPower-OnPasswordandpresstheEnterkey.
3.Thepassworddialogboxwillbedisplayed.T ypethepassword,thenpresstheEnterkey.
4.Re-typethepasswordtoconrm.Ifyoutypedthepasswordcorrectly,thepasswordwillbeinstalled.
TochangeaPower-OnPassword,dothefollowing:
1.StarttheLenovoBIOSSetupUtilityprogram(See”StartingtheLenovoBIOSSetupUtilityprogram”on page13.)
2.FromtheSecuritymenu,selectSetPower-OnPasswordandpresstheEnterkey.
3.Thepassworddialogboxwillbedisplayed.TypethecurrentpasswordthenpresstheEnterkey.
4.T ypethenewpassword,thenpresstheEnterkey.Re-typethepasswordtoconrmthenewpassword. Ifyoutypedthenewpasswordcorrectly,thenewpasswordwillbeinstalled.ASetupNoticedconrming thatchangeshavebeensavedwillbedisplayed.
TodeleteapreviouslysetPower-OnPassword,dothefollowing:
1.FromtheSecuritymenu,selectSetPower-OnPasswordandpresstheEnterkey.
2.Thepassworddialogboxwillbedisplayed.TypethecurrentpasswordandpresstheEnterkey.
3.T odeletethePower-OnPassword,leaveeachnewpasswordlineitemblank,thenpressEnter.ASetup Noticeconrmingthatchangeshavebeensavedwillbedisplayed.
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
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SelectA T ADeviceSetup,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.T urnoffyourcomputer.
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:
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a.Ifyoudonotwanttosavethesettings,selectDiscardchangesandExitfromthemenu.
b.Ifyouhavechangedthesesettingsandwanttoreturntothedefaultsettings,selectLoadOptimal
Defaultsfromthemenu.

ExitingtheLenovoBIOSSetupUtilityprogram

Afteryounishviewingorchangingsettings,presstheEsckeytoreturntotheLenovoBIOSSetupUtility programmainmenu.Y oumighthavetopresstheEsckeyseveraltimes.Dooneofthefollowing:
•Ifyouwanttosavethenewsettings,selectSavechangesandExitfromthemenu.WhentheSave& resetwindowshows,selecttheYesbutton,andthenpresstheEnterkeytoexittheLenovoBIOS SetupUtilityprogram.
•Ifyoudonotwanttosavethesettings,selectDiscardchangesandExitfromthemenu.Whenthe ResetWithoutSavingwindowshows,selecttheYesbutton,andthenpresstheEnterkeytoexitthe LenovoBIOSSetupUtilityprogram.
Chapter5.UsingtheSetupUtility17
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18IdeaCentreA720HardwareMaintenanceManual
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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.
Error
Thestartupdriveisnotincludedinthebootsequence conguration.
Nooperatingsystemisinstalledonthebootdrive.Installanoperatingsystemonthebootdrive.
Thebootsectoronthestartupdriveiscorrupted.
Thedriveisdefective.
FRU/Action
Checkthecongurationandensurethestartupdriveis 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
©CopyrightLenovo2012
19
Page 26

POSTerrorcodes

Eachtimeyouturnthecomputeron,itperformsaseriesofteststocheckthatthesystemisoperating correctlyandthatcertainoptionsareset.ThisseriesoftestsiscalledthePower-OnSelf- T est,orPOST. POSTdoesthefollowing:
•Checkssomebasicmotherboardoperations
•Checksthatthememoryisworkingcorrectly
•Startsvideooperations
•Veriesthatthebootdriveisworking
POSTErrorMessageDescription/Action
Keyboarderror
RebootandSelectproperBootdeviceorInsertBoot MediainselectedBootdevice
Cannotinitializethekeyboard.Makesurethekeyboard isproperlyconnectedtothecomputerandthatnokeys areheldpressedduringPOST .T opurposelycongure thecomputerwithoutakeyboard,selectKeyboardless operationinStartupandsettheoptiontoEnabled.The BIOSthenignoresthemissingkeyboardduringPOST.
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
Page 27

Chapter7.Locatingconnectors,controlsandcomponents

1 2
3 7654 8 9
10 11 12 13 14 15
Thissectionprovidesillustrationstohelplocatethevariousconnectors,controlsandcomponentsofthe computer.
Fontview
Thefollowingillustrationshowsthelocationofcontrolsandcomponentsonthefrontofthecomputer.
Attention:Becarefulnottoblockanyairventsonthecomputer.Blockedairventscancauseoverheating.
1.Built-inmicrophone
2.Built-incamera
3.Powerindicator11.NovoVisionbutton
4.Harddiskdriveindicator12.Volumedown
5.Bluetoothstatusindicator13.Volumeup
6.WIFIstatusindicator14.Brightnessdown
7.HDMI-inindicator15.Brightnessup
8.Built-inspeakers
©CopyrightLenovo2012
9.MonitorOn/Off
10.PCmode/HDMI-in/AV-inswitch
21
Page 28
Leftandrightview
2 3 4 6 85
9
10
71
Thefollowingillustrationshowsthelocationofconnectors,controlsandcomponentsontheleftandright sideofthecomputer.
1.Airvents
2.USB3.0connector7.B-CAScardslot(Japanmodelsonly)
3.HDMI-inconnector(selectedmodelsonly)
4.HDMI-outconnector9.Powerbutton
5.Ejectbutton10.Anti-scratchprotector
6.Opticaldrive
8.Memorycardreader
Attention:Donotinsert3-inchdiscsintotheopticaldrive.
22IdeaCentreA720HardwareMaintenanceManual
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Rearview
1 2
3
8764 5
Thefollowingillustrationshowsthelocationofconnectorsandcomponentsontherearofthecomputer.
1.TVtunerconnector(selectedmodelsonly)5.USB2.0connectors(2)
2.Headphoneconnector6.Powerconnector
3.Microphoneconnector
7.Ethernetconnector(RJ45)
4.USB3.0connector8.Securitycableslot
Chapter7.Locatingconnectors,controlsandcomponents23
Page 30
Hardwarecomponents
4 5 6 7
9
10
11
12
13
14
15
16 17
18 19 20
21
8
23
24
25
26
27
28
29
30
31
22
Thefollowingillustrationshowsthecomponentsthatmakeupyourcomputer.
1.Systemfan
2.Scalarboard
3.Harddiskdrivebracket
17.Bluetoothmodule
18.Powerswitchboard
19.Frontfunctionboard
4.Harddiskdrive20.Battery
5.Harddiskdriverubbers
6.CPU
7.Basecover
8.Opticaldrive
9.Opticaldrivebracket
10.Motherboard
11.Chassis
12.Speakers
13.Hinge29.T ouchcontrolboard
14.Opticaldriveejectboard30.Converter
15.Camera
16.WLANcard
24IdeaCentreA720HardwareMaintenanceManual
21.Solidstatedisk
22.TV-tunercard
23.Glass
24.Panelframe
25.LEDpanel
26.Middleframe
27.Rearcover
28.Rearcoverdeco
31.Heat-sink
Page 31
Identifyingpartsonthemotherboard
Themotherboard(sometimescalledtheplanarorsystemboard)isthemaincircuitboardinyourcomputer. Itprovidesbasiccomputingfunctionsandsupportsavarietyofdevicesthatarefactory-installedorthat youcaninstalllater.Thefollowingillustrationshowsthelocationofconnectorsandcomponentsonthe frontofthemotherboard.
1.HDMI-outconnector
2.HDMI-inconnector
3.USB3.0connector
4.Ethernetconnector（RJ45）
5.Powerconnector
6.Systemfanconnector17.Speakerconnector
7.Scalarcableconnector18.Opticaldriveconnector
8.Scalarcableconnector19.Solidstatediskconnector
9.USB2.0connectors(2)
10.USB3.0connector
11.TVjack1
12.TVjack2(Japanonly)
13.Cardreader
14.Microphoneconnector
15.Headphoneconnector
16.Opticaldriveejectbuttonconnector
20.Harddiskdriveconnector
21.Memoryslot
22.CPUsocket
Chapter7.Locatingconnectors,controlsandcomponents25
Page 32
Thefollowingillustrationshowsthelocationofconnectorsandcomponentsonthebackofthemotherboard.
23.TV-T unercardconnector24.Battery
26IdeaCentreA720HardwareMaintenanceManual
Page 33
IdentifyingpartsonthebackoftheLEDpanel
1 2 3
4
5678
ThefollowingillustrationshowsthecomponentsandcontrolsonthebackofLEDpanel.
1.Bluetoothmodule
2.WLANcard
3.Camera7.Scalarboard
4.T ouchcontrolboard8.Powerswitchboard
5.Frontfunctionboard
6.Converterboard
Chapter7.Locatingconnectors,controlsandcomponents27
Page 34
28IdeaCentreA720HardwareMaintenanceManual
Page 35

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.Placethesystemonaat,stablesurface.
©CopyrightLenovo2012
29
Page 36

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:Y ourkeyboardwillbeconnectedtoaUSBconnectorononesideorattherearofthe computer.
Step4.Disconnectthedefectivekeyboardcablefromthecomputerandconnectthenewkeyboardcable
tothesameconnector.
Note:Themousecanbereplacedusingthesamemethod.

Replacingthepowercordorpoweradapter

Attention:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.
Toreplacethepowercordandpoweradapter:
Step1.Removeanymedia(disks,CDs,DVDs,ormemorycards)fromthedrives,shutdowntheoperating
system,andturnoffthecomputerandallattacheddevices.
30IdeaCentreA720HardwareMaintenanceManual
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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
Page 38
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
Page 39
Step5.Removethe2screwsthatsecuretheharddiskdrivetothemotherboard.1
1
1
2
Step6.Disconnectthedataandpowercablefromtheharddiskdrive.2
Step7.Slidetheharddiskdriveandrubberoutofthebayasshown.
Step8.Detachtherubbersfromtheharddiskdriveasshown.
Step9.Installthenewharddiskdriveasfollows:
a.Attachtherubberstothenewharddiskdrive.
b.Lineupthenewharddiskdriveandslideitbackintotheharddiskdrivebay.
Chapter8.Replacinghardware33
Page 40
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
Page 41
Step5.Removethe3screwsthatsecurethesystemfantotheheat-sink.1
1
2
3
Step6.Disconnectthepowercablefromthemotherboard.2
Step7.Liftthesystemfanuptoremoveit.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
Page 42
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
Page 43
Step8.Liftthemicroprocessorstraightupandoutofthesocket.3
1 2
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
Page 44
Step11.Lowerthemicroprocessorstraightdownintoitssocketonthemotherboard.
Step12.T osecurethemicroprocessorinthesocket,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
Page 45
Step6.Removethe3screwsthatsecuretheopticaldrivetothemotherboardandliftituptoremoveit.
Step7.Removethe5screwsthatsecuretheopticaldrivetothebracketanddisconnectthedatacable
fromtheopticaldrive.
Step8.Installthenewopticaldriveasfollows:
a.Connectthedatacabletothenewopticaldrive.
b.Alignthenewopticaldrivewiththebracket,pushitintopositionandsecureitwiththe5screws.
c.Lineuptheopticaldrivebracketholeswiththemountingholesinthemotherboardandsecure
itwiththe3screws.
d.Connectthedatacabletothemotherboard.
Step9.Reattachthebasecoverandsecureitwiththescrews.
Chapter8.Replacinghardware39
Page 46

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
Page 47
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
Page 48
Step14.Removethe8screwsthatsecurethemotherboardtothechassisandslideitoutasshown.
Step15.Removethe2screwsthatsecuretheTV-Tunercardtothemotherboard.
Step16.Disconnecttheantennacable(s)fromtheTV- T unercard.
Step17.PulltheTV-Tunercardupwardtoremoveitfromthecardport.
42IdeaCentreA720HardwareMaintenanceManual
Page 49
Step18.Useaatheadscrewdriverasalevertopriseoutthebatteryasshown.
Step19.T oinstallthenewmotherboard:
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
Page 50
Step10.Removethe8screwsthatsecurethemotherboardtothechassisandslideitoutasshown.
Step11.Removethe4screwsthatsecurethespeakersystemtothemotherboard.
Step12.Detachthespeakerfromthechassis.
Step13.T oinstallthenewspeakersystem:
a.Attachthenewspeakercabletothechassis.
b.Lineupthemotherboardwiththechassisandslideitintoposition.Aligntheholesonthe
motherboardwiththemountingholesonthechassisandsecureittothechassiswiththe 8screws.
c.Lineupthenewspeakersystemwiththemotherboardandsecureitwiththe4screws.
d.Connectthenewspeakercabletothemotherboard.
Step14.Reattachtheopticaldrive,heat-sink,andharddiskdrivetothemotherboard.
Step15.Reattachthehingetothechassis,andreconnectthetouchandLEDpanelcablestothe
motherboard.
Step16.Reattachthebasecoverandsecureitwiththescrews.
44IdeaCentreA720HardwareMaintenanceManual
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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- T unercard.
Chapter8.Replacinghardware45
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Step13.PulltheTV-Tunercardupwardtoremoveitfromthecardportonthemotherboard.
Step14.T oinstallthenewTV-Tunercard:
a.InsertthenotchedendoftheTV-Tunercardintothecardportonthemotherboard.
b.SecurenewtheTV- T unercardtothemotherboardwiththe2screws.
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
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Step10.Removethe8screwsthatsecurethemotherboardtothechassisandslideitoutasshown.
Step11.Useaatheadscrewdriverasalevertopriseoutthebatteryasshown.
Step12.T oinstallthenewbattery:
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
Page 54
Step1.Removeanymedia(disks,CDs,DVDs,ormemorycards)fromthedrives,shutdowntheoperating
1
2
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
Step7.Toreattachthehingetothechassis:
a.Lineupthehingewiththechassisandslidethehingeintoposition.
b.Securethehingetothechassiswiththe6screws.
c.ReconnectthetouchandLEDpanelcablestothemotherboard.
48IdeaCentreA720HardwareMaintenanceManual
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Step8.Reattachthebasecoverandsecureitwiththescrews.
1
2

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
Chapter8.Replacinghardware49
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Step7.Puttheheadofaatheadscrewdriverbetweenthemiddleframeandtherearcoverasshown.
Fulcru m
Leve r
1
2
Thenusingthescrewdriverasaleverandthemiddleframemetalbarasthefulcrum,prisetherear coverawayfromthemiddleframe.1
Step8.Workingaroundtheedgeinananti-clockwisedirection,useyourngerstopriseuptherearcover.
Therearcoverispinnedintoplace,useshort,sharpmovementstopriseitup.2
Step9.Pressdownthehingeandslideouttherearcover.
Step10.T oreattachtherearcover:
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
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Step8.Removethescalarshieldingandsetitaside.
WLAN
Ca mera
Con verte r
Touch co ntrol
Sc alar
HDMI/DVI
LED/CIR LVDS
MMB
Po wer Blue tooth
Step9.Disconnectallthecablesfromthescalarboard.
Step10.Removethe5screwsthatsecurethescalarboardtothemiddleframeandliftituptoremoveit.
Step11.T oinstallthenewscalarboard:
Chapter8.Replacinghardware51
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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.T oinstallthenewtouchcontrolboard:
52IdeaCentreA720HardwareMaintenanceManual
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a.Lineuptheholesonthenewtouchcontrolboardwiththemountingholesonthemiddleframe
1
1
1
1
2
2
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.
Chapter8.Replacinghardware53
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Step10.T oinstallthenewconverterboard:
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
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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” .
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Step6.Removetherearcover.Referto“Removingtherearcover” .
1
2
3
Step7.UseasmallatheadscrewdrivertoprisetheBluetoothmoduleawayfromthesocket.12
Step8.DisconnectthecablefromtheBluetoothmodule.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
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Step9.LiftuptheWLANcardtoremoveitfromthesocket.
1
1
1
1
2
4
3
Step10.T oinstallthenewWLANcard:
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
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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
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Step9.Liftupthefrontfunctionboardtoremoveitfromthefrontbezel.3
3
1
2
1
Step10.T oinstallthenewfrontfunctionboard:
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)
Step4.Removethebasecover.Referto“Removingthebasecover”.
Step5.Removethehingefromthechassis.Referto“Removingthehingefromthechassis” .
Step6.Removetherearcover.Referto“Removingtherearcover” .
cables,andanyothercablesthatareconnectedtothecomputer.Referto“Leftandrightview” and“Rearview”forhelpwithlocatingthevariousconnectors.
Chapter8.Replacinghardware59
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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
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Step17.Removethe6screwsthatsecurethehingetothemiddleframeandsetthehingeaside.
Step18.T oinstallthenewtheLEDpanel:
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
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4 5 6 7
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#FRUs
ServicePartNumber(FRU
CRUID
#)
Motherboard
A7201G_DDR3W/HDINW/TV1MB
A7202G_DDR3W/HDINW/TV1MB
A7201G_DDR3W/HDINW/OTVMB
A7202G_DDR3W/HDINW/OTVMB
A7201G_DDR3W/OHDINW/OTV1MB
A7202G_DDR3W/OHDINW/OTV1MB
IntelPPTC1HM76Chipset
CPU
IntelI3-3110M2.4GL13M2cPGAProcessor
90000165N
90000166N
90000167N
90000168N
90000169N
90000170N
1100364N
102500303N
10
IntelI5-3210M2.5GL13M2cPGAProcessor
62IdeaCentreA720HardwareMaintenanceManual
IntelI5-3320M2.6GL13M2cPGAProcessor
IntelI5-3360M2.8GL13M2cPGAProcessor
IntelI7-3820QM2.7GE16M4cPGAProcessor
IntelI7-3720QM2.6GE16M4cPGAProcessor
IntelI7-3612QM2.1GE16M4cPGAProcessor
IntelI7-3610QM2.3GE16M4cPGAProcessor
IntelSNBI3-2330M2.2G3MJ1PGA
LAN
RealtekRTL8111F73040793N
102500301N
102500299N
102500297N
102500304N
102500306N
102500290N
102500289N
102500017N
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AudioN
RealtekALC272-VA4
73040715N
Memory
M471B5773DH0-CK0
HMT325S6CFR8C-PB
MT8KTF25664HZ-1G6M1
Elp_RJ2108BDBG-GN-F2GBD3-1600SMEMORY
M471B5273DH0-CK0
HMT351S6CFR8C-PB
Elp_RJ2108BDBG-GN-F4GBD3-1600SMEMORY
MT16KTF51264HZ-1G6M1
1-100226N
1-100227N
1-100228N
1-100425N
1-100230N
1-100231N
1-100426N
1-100232N
Harddiskdrive
SeagateST9500325AS500G9NBHDD
WDWD5000BPVT-24HXZ5400RPM500GHDD9.5mm4ksector
16-004189N
16004846N
WDWD5000BPVT-24A1YT05400PRM9.5mm500HDD16-200089N
4
WDWD7500BPVT-24HXZ5400RPM750GHDD
16-004848N
WDWD7500BPVT-24A1YT05400PRM9.5mm750HDD16200088N
WDWD10JPVT-24A1YT05400PRM9.5mm1THDD16200071N
A720HDDCable
90200731N
A720HDDBracket90200753N
Solidstatedisk
21
SamsungMZMPA064HMDR64GmSATASSD
SamsungPM830
16-005084N
16200109N
Opticaldiskdrive
HLDSCA30NBDCombo-LH（BE）
PLDSDL-4ETS12.7mmSlimSA T ASlotloadBDCombo
8
PLDSDC-6E2SHBDCombo-LH（BE）
SONYOptiarcAD-7800SlotRambo
HLDSGA31NSlimSATASlotDVDRW
A720ODDCable
14
A720ODDEJECTBOARD
9
A720ODDBracket
25-200325N
25008493N
25-200326N
25-203881N
25-009580N
90200732N
90000217N
90200752N
Graphics
N13P-GL-AIO-A1GT630M
1100400N
VRAM
H5TQ1G63DFR-11C
1007418N
10
K4W1G1646G-BC11
K4W2G1646C-HC11
H5TQ2G63DFR-11CDDR32GRAM　
K4W2G1646E-HC11DDR32GRAM
1007420N
1007156N
1100323N
1100321N
Chapter8.Replacinghardware63
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PowerSupply
FSP150-RAB150Wadapter®
LietonPA-1151-11VA150wadapter(R)
Heat-sink
31
16
22
17
15
12
30
A720CoolMasterDIS45WHeatSink
A720A VCDIS45WHeatSink
Systemfan
1
A720DeltaDIS45WF an
A720AVCDIS45WFan
WLANcard
A720WlanCardW/CABLE
A720WlanAnntena90200739N
TV- T unercard
AvermediaH339BBDVB-TMiniTVCard
AvermediaH339BAATSCMiniTVCard
DVB-T,A TSCHybridMC907
YUANM270BMiniTVCard(R)
AverMediaH339ISDB-TMiniTVCard®
DMB-T(HK)Hybrid:MC163M
YUANMC182AAnalogminiTVCard®
A720TVT unnerCableForNTSL
A720TVT unnerCableForPAL
Remotecontrol
PhilipsWin7IR43KeyController(R)
PhilipsWin7IRReveiver(R)
Bluetoothmodule
FcnBCM92070BT2.1EDRFlashDTCard®
USIBCM92070BT2.1EDRFlashDTCard®
A720BluetoothCardCable
Camera
QuantaH264720POV9712CAM
A720WebcamCable
Speakers
A720Speaker(L+R)
Converter
A720Converter
A720ConverterCable
36-0018761
36-0018751
90200583N
90201255N
90200584N
90201256N
90000171N
11200290N
11200291N
11-013387N
11012147N
11012854N
11-011447N
11012280N
90201142N
90201143N
8880106611
8880106621
11200978N
11200979N
90200741N
20200089N
90200740N
90200743N
90000215N
90200737N
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Touchcontrolboard
Mastouch27"PCTtouchpanelwin8
AUOM270HW02V3Ultra-slimMVA-LED
73041906N
18200174N
A720MastouchT ouchModule90400015N
A7203MLCDT ouchModule
29
A720LCDFrontBezel
A720MastouchMainFrameStand
A7203MMainFrameStand
A720TOUCHCable
90400016N
90200748N
90200749N
90200750N
90200733N
Keyboard
LiteonSK-8861(TW)S-SilkKB-Silver（WW）
LiteonSK-8861(TH)S-SilkKB-Silver（WW）
LiteonSK-8861(BE)S-SilkKB-Silver（WW）
LiteonSK-8861(DE)S-SilkKB-Silver（WW）
LiteonSK-8861(GB)S-SilkKB-Silver（WW）
LiteonSK-8861(IL)S-SilkKB-Silver（WW）
LiteonSK-8861(IT)S-SilkKB-Silver（WW）
LiteonSK-8861(IS)S-SilkKB-Silver（WW）
LiteonSK-8861(Nordic)S-SilkKB-Silver（WW）
LiteonSK-8861(NL)S-SilkKB-Silver（WW）
LiteonSK-8861(EN-FR)S-SilkKB-Silver（WW）
LiteonSK-8861(US)S-SilkKB-Silver（WW）
LiteonSK-8861(PT)S-SilkKB-Silver（WW）
LiteonSK-8861(FR)S-SilkKB-Silver（WW）
LiteonSK-8861(ES)S-SilkKB-Silver（WW）
LiteonSK-8861(JP)S-SilkKB-Silver（WW）
LiteonSK-8861(US-IN)S-SilkKB-Silver（WW）
LiteonSK-8861(SA)S-SilkKB-Silver（WW）
LiteonSK-8861(BR)S-SilkKB-Silver（WW）
LiteonSK-8861(CS-SK)S-SilkKB-Silver（WW）
LiteonSK-8861(GR)S-SilkKB-Silver（WW）
LiteonSK-8861(KR)S-SilkKB-Silver（WW）
LiteonSK-8861(LA)S-SilkKB-Silver（WW）
LiteonSK-8861(RU)S-SilkKB-Silver（WW）
LiteonSK-8861(US-EU)S-SilkKB-Silver（WW）
LiteonSK-8861(SL)S-SilkKB-Silver（WW）
LiteonSK-8861(BG)S-SilkKB-Silver（WW）
LiteonSK-8861(HU)S-SilkKB-Silver（WW）
LiteonSK-8861(TR)S-SilkKB-Silver（WW）
LiteonSK-8861(US-MY)S-SilkKB-Silver（WW）
902005392
902005402
902005412
902005422
902005432
902005442
902005452
902005462
902005472
902005482
902005492
902005502
902005512
902005522
902005532
902005542
902005552
902005562
902005572
902005582
902005592
902005602
902005612
902005622
902005632
902005642
902005652
902005662
902005672
902005682
Chapter8.Replacinghardware65
Page 72
LiteonSK-8861(LA-AR)S-SilkKB-Silver（WW）
Mouse
LiteonSM-8861(WW)MouseSilver（WW）
LiteonSM-8861Mouse(MY)Silver（WW）
LiteonSM-8861Mouse(NoBattery)Silver（WW）
LiteonSM-8861(JP)Mouse-Silver(WW)
Powercords
Volex1.0mC5USPowerCable
longwellBlackSingle-end1.0mSAAPowerCable
Volex1.0mC5AustrilianPowerCable
Luxshare1.0mC5AustrilianPowerCable
1.0MC5JPNpowercordwithconverter®
Volex1.0mC5JapanPowerCable
Luxshare1.0mC5JapanPowerCable
GrandsunBlackSingle-end1.0m3wireCCCPowerCable(R)
Luxshare1.0MC5CCCPowerCable
longwellBlackSingle-end1.0mASTAPowerCable
Volex1.0mC5UKPowerCable
longwellBlackSingle-end1.0mVDEPowerCable
Volex1.0mC5EuropePowerCable
Luxshare1.0mC5EuropePowerCable
longwellBlackSingle-end1.0mIndiaPowerCable
LongwellBlackSingle-end1.0mItalyC5PowerCable®
Volex1.0mC5ItalyPowerCable
LongwellBlackSingle-end1.0mBrazilPowerCable®
Volex1.0mC5BrazilPowerCable
LongwellBlackSingle-end1.0mArgentinaC5PowerCable®
Volex1.0mC5USPowerCable
LongwellBlackSingle-end1.0mDenmarkC5PowerCable®
Volex1.0mC5DenmarkPowerCable
LongwellBlackSingle-end1.0mSwitzerlandC5PowerCable®
Volex1.0mC5SwitzerlandPowerCable
LongwellBlackSingle-end1.0mIsraelC5PowerCable®
Volex1.0mC5IsraelPowerCable
LongwellBlackSingle-end1.0mTaiwanC5PowerCable®
Volex1.0mC5TaiwanPowerCable
LongwellBlackSingle-end1.0mKoreaC5PowerCable®
Volex1.0mC5KoreaPowerCable
902005692
902005702
902005712
902005722
902007812
310338581
310353971
310495001
310495201
31038887linecord +310396553pin2pin converter
310495061
310495191
310329531
310451471
310353961
310494961
310353321
310494971
310495181
310353951
310391041
310495041
310358281
310495051
310391001
310495071
310391011
310495031
310391031
310495081
310391071
310495021
310388851
310494991
310391061
310494981
1
66IdeaCentreA720HardwareMaintenanceManual
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LongwellBlackSingle-end1.0mSAC5PowerCable®
Volex1.0mC5SAPowerCable
310391051
310495011
Mechanical
A720BaseCoverW/BCASW/TV2W/HDMI
A720BaseCoverW/OBCASW/OTV2W/HDMI
90200744N
90200745N
7
A720BaseCoverW/OBCASW/OTV2W/OHDMI
A720BaseCoverW/OBCASW/OTVW/HDMI
90200746N
90200747N
18A720PowerBoard90000214N
19A720LEDFunctionBoard90000216N
2
A720ScalarBoard
A720PANELBACKLIGHTCABLE
A720PowerSwitchCable
A720L VDSCable
A720LEDFunctionBoardCable
A720MMBCable
27
A720BackCover
90000218N
90200734N
90200735N
90200736N
90200738N
90200742N
90200751N
28A720RearDeco90200754N
A720ScalarEMIShielding
90201154N
A720BaseBottomAssy90201155N
Chapter8.Replacinghardware67
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68IdeaCentreA720HardwareMaintenanceManual
Page 75

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:Y oucanspecifyadateandtimeatwhichthecomputerwillbeturnedonautomatically. Thiscanbeeitherasingleevent,adailyeventoraweeklyevent.
•WakeUponLAN:ThisfeatureallowsLANadaptercardtowaketheSystem.
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