Lenovo IdeaCentre C240 User manual

LenovoC240/245/255All-In-OnePCHardware
MaintenanceManual
ideaideaideaCentreidea
MachineType:10113/6268[C240];10114/6269[C245];10137/F0A1
[C255]

LenovoC240/245/255All-In-OnePC
HardwareMaintenanceManual
MachineType:10113/6268[C240];10114/6269[C245];10137/F0A1
[C255]

FourthEdition(July2013)25th
©CopyrightLenovo2012,2013.
LIMITEDANDRESTRICTEDRIGHTSNOTICE:IfdataoroftwarearedeliveredpuruantaGeneralService
Adminitration“GSA”contract,ue,reproduction,ordicloureiubjecttoretrictionetforthinContractNo.
GS-35F-05925

Contents
Chapter1.Aboutthimanual......1
ImportantSafetyInformation..........1
Chapter2.Safetyinformation......3
Generalafety................3
Electricalafety...............3
Safetyinpectionguide............5
Handlingelectrotaticdicharge-enitive
device..................5
Groundingrequirement............6
Safetynotice................6
Chapter3.Generalinformation.....9
Specification................9
Chapter4.GeneralCheckout.....11
Chapter5.UingtheSetupUtility...13
StartingtheLenovoBIOSSetupUtilityprogram.13
Viewingandchangingetting........13
Uingpaword..............13
Enablingordiablingadevice........15
Selectingatartupdevice..........16
Changingbootingmode...........17
ExitingtheLenovoBIOSSetupUtilityprogram..17
Chapter6.Symptom-to-FRUIndex..19
Harddikdrivebooterror..........19
PowerSupplyProblem...........19
POSTerrorcode.............20
Undeterminedproblem...........20
Chapter7.Locatingconnector,
controlandcomponent......21
Chapter8.Replacinghardware....27
Generalinformation.............27
Replacingthekeyboardandmoue......28
Replacingtheopticaldrive..........28
Replacingthepoweradapter.........30
Removingtherearcover...........31
Replacingamemorymodule.........32
Replacingtheharddikdrive.........32
Replacingtheheat-ink...........33
Replacingtheytemfan..........34
ReplacingtheWi-Ficard...........35
Replacingthepeakerytem........36
Replacingthefrontindicatorboard.......37
Replacingthepowerwitchboard.......38
Replacingthemotherboard..........39
Replacingthecomputertand........41
Replacingthecamera............41
Replacingtheconverterboard........42
ReplacingtheLEDpanel...........43
Chapter9.FRUlit-C240–245....47
Chapter10.FRUlit-C255......51
Chapter11.AdditionalService
Information..............57
©CopyrightLenovo2012,2013iii

ivLenovoC240/245/255All-In-OnePCHardwareMaintenanceManual

Chapter1.Aboutthimanual
ThimanualcontainerviceandreferenceinformationforLenovoC240/C245/C255All-In-Onecomputer
litedonthecover.ItiintendedonlyfortrainedervicerwhoarefamiliarwithLenovocomputerproduct.
BeforeervicingaLenovoproduct,beuretoreadtheSafetyInformation.
ThedecriptionoftheTV-tunercardinthimanualapplieonlytocomputerwithaTV-tunercardintalled.
ItdoenotapplytocomputerwithoutaTV-tunercard.
ImportantSafetyInformation
BeuretoreadallCAUTIONandDANGERectioninthimanualbeforefollowinganyoftheintruction.
VeuillezliretouteleconignedetypeDANGERetATTENTIONdupréentdocumentavantd’exécuter
leintruction.
LeenSieunbedingtalleHinweievomTyp“ACHTUNG”oder“VORSICHT”indieerDokumentation,bevor
SieirgendwelcheVorgängedurchführen
LeggereleitruzioniintrodottedaATTENZIONEePERICOLOpreentinelmanualeprimadieeguireuna
qualiaidelleitruzioni
Certifique-edelertodaaintruçõedecuidadoeperigonetemanualantedeexecutarqualquer
umadaintruçõe
Eimportantequeleatodaladeclaracionedeprecauciónydepeligrodeetemanualantedeeguir
laintruccione.
©CopyrightLenovo2012,20131

2LenovoC240/245/255All-In-OnePCHardwareMaintenanceManual

Chapter2.Safetyinformation
Thichaptercontaintheafetyinformationthatyouneedtobefamiliarwithbeforeervicingacomputer.
Generalafety
Followtheeruletoenuregeneralafety:
•Keeptheareaaroundthecomputerclearandcleanduringandaftermaintenance.
•Whenliftinganyheavyobject:
1.Enureyoucantandafelywithoutlipping.
2.Ditributetheweightoftheobjectequallyacrobothfeet.
3.Liftlowly.Nevermoveuddenlyortwitwhenyouattempttolift.
4.Liftbytandingorbypuhingupwithyourlegmucle;thiactionremovethetrainfromthe
mucleinyourback.
Donotattempttoliftanyobjectsthatweighmorethan16kg(35lbs.)orobjectsthatyouthink
aretooheavyforyou.
•Donotperformanyactionthatwouldcreateahazardforthecutomer,orwouldmakethecomputer
unafe.
•Beforeyoutartthecomputer,enurethatotherervicerepreentativeandcutomerperonnelarenot
inapoitionthatwouldcreateahazardforthem.
•Placeremovedcoverandotherpartinaafeplace,awayfromallperonnel,whileyouareervicingthe
computer.
•Keepyourtoolcaeawayfromareathatpeoplemaywalkthroughtoenureno-onetripoverit.
•Donotwearlooeclothingthatcanbetrappedinthemovingpartofamachine.Enurethatyourleeve
arefatenedorrolledupaboveyourelbow.Ifyourhairilong,tieorfatenitback.
•Inerttheendofyournecktieorcarfinideclothingorfatenitwithanonconductiveclip,approximately
8centimeter(3inche)fromtheend.
•Donotwearjewelry,chain,metal-frameeyeglae,ormetalfatenerforyourclothing.
Remember:Metalobjectaregoodelectricalconductor.
•Wearafetyglaewhenyouare:hammering,drillingoldering,cuttingwire,attachingpring,uing
olvent,orworkinginanyotherconditionthatmightbehazardoutoyoureye.
•Afterervice,reintallallafetyhield,guard,label,andgroundwire.Replaceanyafetydevice
thatiwornordefective.
•Reattachallcovercorrectlybeforereturningthecomputertothecutomer.
Electricalafety
CAUTION:
Electricalcurrentfrompower,telephone,andcommunicationcablecanbehazardou.Toavoid
peronalinjuryorequipmentdamage,diconnectanyattachedpowercord,telecommunication
cable,networkcable,andmodemcablebeforeyouopenthecomputercover,unleintructed
otherwieintheintallationandconfigurationprocedure.
©CopyrightLenovo2012,20133

Obervethefollowingrulewhenworkingonelectricalequipment.
Important:Ueonlyapprovedtoolandtetequipment.Somehandtoolhavehandlecoveredwithaoft
materialthatdoenotinulateyouwhenworkingwithliveelectricalcurrent.Manycutomerhaverubber
floormatneartheirequipmentthatcontainmallconductivefibertodecreaeelectrotaticdicharge.
•Findtheroomemergencypower-off(EPO)witch,diconnectingwitch,orelectricaloutlet.Ifanelectrical
accidentoccur,youcanthenoperatethewitchorunplugthepowercordquickly.
•Donotworkaloneunderhazardouconditionornearequipmentthathahazardouvoltage.
•Diconnectallpowerbefore:
–Performingamechanicalinpection
–Workingnearpowerupplie
–RemovingorintallingFieldReplaceableUnit(FRU)
•Beforeyoutarttoworkonthecomputer,unplugthepowercord.Ifyoucannotunplugit,akthe
cutomertopower-offtheelectricaloutletthatuppliepowertothemachineandtolocktheelectrical
outletintheoffpoition.
•Ifyouneedtoworkonacomputerthathaexpoedelectricalcircuit,obervethefollowingprecaution:
–Enurethatanotherperon,familiarwiththepower-offcontrol,inearyou.
Remember:Anotherperonmutbetheretowitchoffthepower,ifneceary.
–Ueonlyonehandwhenworkingwithpowered-onelectricalequipment;keeptheotherhandinyour
pocketorbehindyourback.
Remember:Theremutbeacompletecircuittocaueelectricalhock.Byobervingtheaboverule,
youmaypreventacurrentfrompaingthroughyourbody.
–Whenuingateter,etthecontrolcorrectlyanduetheapprovedprobeleadandacceoriefor
thatteter.
–Standonuitablerubbermat(obtainedlocally,ifneceary)toinulateyoufromgrounducha
metalfloortripandmachineframe.
Obervethepecialafetyprecautionwhenyouworkwithveryhighvoltage;theeintructionarein
theafetyectionofthemaintenanceinformation.Ueextremecarewhenmeauringhighvoltage.
•Regularlyinpectandmaintainyourelectricalhandtooltoenuretheyareafetoue.
•Donotuewornorbrokentoolandteter.
•Neverassumethatpowerhabeendiconnectedfromacircuit.Firt,checkthatithabeenpoweredoff.
•Alwaylookcarefullyforpoiblehazardinyourworkarea.Exampleoftheehazardarewetfloor,
non-groundedpowerextenioncable,conditionthatmaycaueorallowpowerurge,andmiing
afetyground.
•Donottouchliveelectricalcircuitwiththereflectiveurfaceofaplaticdentalmirror.Thiurfacei
conductive,andtouchingalivecircuitcancaueperonalinjuryanddamagetothecomputer.
•Donotervicethefollowingpartwiththepoweronwhentheyareremovedfromtheirnormaloperating
poitioninacomputer:
–Powerupplyunit
–Pump
–Blowerandfan
–Motorgenerator
andimilarunit.(Thipracticeenurecorrectgroundingoftheunit.)
•Ifanelectricalaccidentoccur:
–Uecaution;donotbecomeavictimyourelf.
4LenovoC240/245/255All-In-OnePCHardwareMaintenanceManual

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

•Keepthepartinprotectivepackageuntiltheyareinertedintotheproduct.
•Avoidcontactwithotherpeoplewhilehandlingthepart.
•Wearagroundedwrittrapagaintyourkintoeliminatetaticonyourbody.
•Preventthepartfromtouchingyourclothing.Motclothingiinulativeandretainachargeeven
whenyouarewearingawrittrap.
•Uetheblackideofagroundedworkmattoprovideatatic-freeworkurface.Thematiepecially
uefulwhenhandlingESD-enitivedevice.
•Selectagroundingytem,uchathoelitedbelow,toprovideprotectionthatmeetthepecific
ervicerequirement.
Note:TheueofagroundingytemideirablebutnotrequiredtoprotectagaintESDdamage.
–AttachtheESDgroundcliptoanyframeground,groundbraid,orgreen-wireground.
–UeanESDcommongroundorreferencepointwhenworkingonadouble-inulatedor
battery-operatedytem.Youcanuecoaxorconnector-outidehellontheeytem.
–Uetheroundground-prongoftheACplugonAC-operatedcomputer.
Groundingrequirement
Electricalgroundingofthecomputerirequiredforoperatorafetyandcorrectytemfunction.Proper
groundingoftheelectricaloutletcanbeverifiedbyacertifiedelectrician.
Safetynotice
TheCAUTIONandDANGERafetynoticeinthiectionareprovidedinthelanguageofEnglih.
DANGER
Electricalcurrentfrompower,telephoneandcommunicationcableihazardou.
Toavoidahockhazard:
•Donotconnectordiconnectanycableorperformintallation,maintenance,orreconfiguration
ofthiproductduringanelectricaltorm.
•Connectallpowercordtoaproperlywiredandgroundedelectricaloutlet.
•Connectanyequipmentthatwillbeattachedtothiproducttoaproperlywiredoutlet.
•Whenpoible,ueonehandonlytoconnectordiconnectignalcable.
•Neverturnonanyequipmentwhenthereievidenceoffire,water,ortructuraldamage.
•Diconnecttheattachedpowercord,telecommunicationcable,networkcable,andmodem
cablebeforeyouopenthedevicecover,unleintructedotherwieintheintallationand
configurationprocedure.
•Connectanddiconnectcableadecribedinthefollowingtablewhenintalling,moving,or
openingcoveronthiproductorattacheddevice.
6LenovoC240/245/255All-In-OnePCHardwareMaintenanceManual

ToConnectToDiconnect
1.TurneverythingOFF .
2.Firt,attachallcabletodevice.
3.Attachignalcabletoconnector.
4.Attachpowercordtooutlet.
5.TurndeviceON.
1.TurneverythingOFF .
2.Firt,removepowercordfromoutlet.
3.Removeignalcablefromconnector.
4.Removeallcablefromdevice.
CAUTION:
Whenreplacingthelithiumbattery,ueonlyPartNumber45C1566oranequivalenttypebattery
recommendedbythemanufacturer.Ifyourytemhaamodulecontainingalithiumbattery,replace
itonlywiththeamemoduletypemadebytheamemanufacturer.Thebatterycontainlithiumand
canexplodeifnotproperlyued,handled,ordipoedof.
Donot:
•Throwintoorimmereinwater
•Heattomorethan100°C(212°F)
•Repairordiaemble
Dipoeofthebatteryarequiredbylocalordinanceorregulation.
CAUTION:
Whenlaerproduct(uchaCD-ROM,DVD-ROMdrive,fiberopticdevice,ortranmitter)are
intalled,notethefollowing:
•Donotremovethecover.Removingthecoverofthelaerproductcouldreultinexpoureto
hazardoulaerradiation.Therearenoerviceablepartinidethedevice.
•Ueofcontroloradjutmentorperformanceofprocedureotherthanthoepecifiedherein
mightreultinhazardouradiationexpoure.
DANGER
SomelaerproductcontainanembeddedCla3AorCla3Blaerdiode.Notethefollowing:
Theediodeemitradiationwhenopen.Donottareintothebeam,donotviewdirectlywith
opticalintrument,andavoiddirectexpouretothebeam.
Chapter2.Safetyinformation7

≥18kg(37lb)≥32kg(70.5lb)≥55kg(121.2lb)
CAUTION:
Ueafepracticewhenlifting.
CAUTION:
Thepowercontrolbuttononthedeviceandthepowerwitchonthepowerupplydonotturnoff
theelectricalcurrentuppliedtothedevice.Thedevicealomighthavemorethanonepower
cord.Toremoveallelectricalcurrentfromthedevice,enurethatallpowercordarediconnected
fromthepowerource.
1
2
CAUTION:
Donotplaceanyobjectweighingmorethan82kg(180lb.)ontopofrack-mounteddevice.
8LenovoC240/245/255All-In-OnePCHardwareMaintenanceManual

Chapter3.Generalinformation
Thichapterprovidegeneralinformationthatapplietoallcomputermodelcoveredbythimanual.
Specification
Thiectionlitthephyicalpecificationforyourcomputer.
Thiectionlitthephyicalpecificationforyourcomputer.
TypeLenovoC240/C245/C255
Thiectionlitthephyicalpecification.
Environment
Airtemperature:
Operating:10°to35°C
Tranit:-20°to55°C
Humidity:
Operating:35%to80%
Tranit:20%to90%(40°C)
Altitude:86KPato106KPa
Electricalinput:
Inputvoltage:90V-264V(AC)
Inputfrequency:47Hz-63Hz
©CopyrightLenovo2012,20139

10LenovoC240/245/255All-In-OnePCHardwareMaintenanceManual

Chapter4.GeneralCheckout
Attention:Thedriveinthecomputeryouareervicingmighthavebeenrearrangedorthedrivetartup
equencemayhavebeenchanged.Beextremelycarefulduringwriteoperationuchacopying,aving,or
formatting.Dataorprogramcanbeoverwrittenifyouelectanincorrectdrive.
Generalerrormeageappearifaproblemorconflictifoundbyanapplication,theoperatingytem,or
both.Foranexplanationoftheemeage,refertotheinformationuppliedwiththatoftwarepackage.
Uethefollowingproceduretohelpdeterminethecaueoftheproblem:
1.Power-offthecomputerandallexternaldevice.
2.Checkallcableandpowercord.
3.Setalldiplaycontroltothemiddlepoition.
4.Power-onallexternaldevice.
5.Power-onthecomputer.
•Lookfordiplayederrorcode.
•Lookforreadableintructionoramainmenuonthediplay.
Ifyoudidnotreceivethecorrectrepone,proceedtotep6.
Ifyoudidreceivethecorrectrepone,proceedtotep7.
6.Ifoneofthefollowinghappen,followtheintructiongiven:
•IfthecomputerdiplayaPOSTerror,goto“POSTerrorcode” .
•Ifthecomputerhangandnoerroridiplayed,continueattep7.
7.Ifthetettopandyoucannotcontinue,replacethelatdeviceteted.
©CopyrightLenovo2012,201311

12LenovoC240/245/255All-In-OnePCHardwareMaintenanceManual

Chapter5.UingtheSetupUtility
TheSetupUtilityprogramiuedtoviewandchangetheconfigurationettingofyourcomputer,regardle
ofwhichoperatingytemyouareuing.However,theoperatingytemettingmightoverrideanyimilar
ettingintheSetupUtilityprogram.
StartingtheLenovoBIOSSetupUtilityprogram
TotarttheLenovoBIOSSetupUtilityprogram,dothefollowing:
1.Ifyourcomputerialreadyonwhenyoutartthiprocedure,hutdowntheoperatingytemand
turnoffthecomputer.
2.PreandholdtheF1keythenturnonthecomputer.WhentheLenovoBIOSSetupUtilityprogrami
diplayed,releaetheF1key.
Note:IfaPower-OnPawordoranAdminitratorPawordhabeenet,theSetupUtilityprogrammenu
willnotbediplayeduntilyoutypeyourpaword.Formoreinformation,ee“Uingpaword.”
Viewingandchangingetting
SytemconfigurationoptionarelitedintheLenovoBIOSSetupUtilityprogrammenu.Tovieworchange
etting,ee“StartingtheSetupUtilityprogram.”
YoumutuethekeyboardwhenuingtheLenovoBIOSSetupUtilitymenu.Thekeyuedtoperform
varioutakarediplayedonthebottomofeachcreen.
Uingpaword
YoucanuetheLenovoBIOSSetupUtilityprogramtoetpawordtopreventunauthorizedperon
fromgainingaccetoyourcomputeranddata.See“StartingtheSetupUtilityprogram.”Thefollowing
typeofpawordareavailable:
•AdminitratorPaword
•Power-OnPaword
Youdonothavetoetanypawordtoueyourcomputer.However,ifyoudecidetoetpaword,read
thefollowingection.
Pawordconideration
Apawordcanbeanycombinationofletterandnumberupto16character(a-zand0-9).Forecurity
reaon,itiagoodideatoueatrongpawordthatcannotbeeailycompromied.Weuggetthat
pawordhouldfollowtheerule:
•Foratrongpaword,ue7-16characterandamixofletterandnumber.
•Donotueyournameoryouruername.
•Donotueacommonwordoracommonname.
•Ueomethingignificantlydifferentfromyourprevioupaword.
Attention:AdminitratorandPower-Onpawordarenotcaeenitive.
©CopyrightLenovo2012,201313

AdminitratorPaword
SettinganAdminitratorPaworddeterunauthorizedperonfromchangingconfigurationetting.You
mightwanttoetanAdminitratorPawordifyouarereponibleformaintainingtheettingofeveral
computer.
AfteryouetanAdminitratorPaword,apawordpromptidiplayedeverytimeyouaccetheLenovo
BIOSSetupUtilityprogram.
IfboththeAdminitratorandPower-OnPawordareet,youcantypeeitherpaword.However,youmut
ueyourAdminitratorPawordtochangeanyconfigurationetting.
Setting,changing,ordeletinganAdminitratorPaword
ToetanAdminitratorPaword,dothefollowing:
Note:Apawordcanbeanycombinationofletterandnumberupto16character(a-zand0-9).For
moreinformation,ee“Pawordconideration”onpage13.
1.StarttheLenovoBIOSSetupUtilityprogram(ee“StartingtheLenovoBIOSSetupUtilityprogram”on
page13).
2.FromtheSecuritymenu,electSetAdminitratorPawordandpretheEnterkey.
3.Thepaworddialogboxwillbediplayed.TypethepawordthenpretheEnterkey.
4.Retypethepawordtoconfirm,thenpretheEnterkey.Ifyoutypedthepawordcorrectly,the
pawordwillbeintalled.ASetupNoticewillbediplayedconfirmingthatyourchangehabeen
aved.
5.ReturntotheLenovoBIOSSetupUtilityprogrammenuandelecttheExitoption.
6.SelectSaveChangeandExitfromthemenu.
TochangeanAdminitratorPaword,dothefollowing:
1.StarttheLenovoBIOSSetupUtilityprogram(ee“StartingtheLenovoBIOSSetupUtilityprogram”on
page13).
2.FromtheSecuritymenu,electSetAdminitratorPawordandpretheEnterkey.
3.Thepaworddialogboxwillbediplayed.TypethecurrentpawordthenpretheEnterkey.
4.T ypethenewpaword,thenpretheEnterkey.Retypethenewpawordtoconfirmit.Ifyoutyped
thenewpawordcorrectly,thenewpawordwillbeintalled.ASetupNoticewillbediplayed
confirmingthatyourchangehavebeenaved.
5.ReturntotheLenovoBIOSSetupUtilityprogrammenuandelecttheExitoption.
6.SelectSaveChangeandExitfromthemenu.
TodeleteaprevioulyetAdminitratorPaword,dothefollowing:
1.StarttheLenovoBIOSSetupUtilityprogram(ee“StartingtheLenovoBIOSSetupUtilityprogram”on
page13).
2.FromtheSecuritymenu,electSetAdminitratorPawordandpretheEnterkey.
3.Thepaworddialogboxwillbediplayed.T ypethecurrentpawordandpretheEnterkey.
4.Leaveeachnewpawordlineitemblank,thenpretheEnterkey.ASetupNoticewillbediplayed
confirmingthatyourchangehavebeenaved.
5.ReturntotheLenovoBIOSSetupUtilityprogrammenuandelecttheExitoption.
6.SelectSaveChangeandExitfromthemenu.
14LenovoC240/245/255All-In-OnePCHardwareMaintenanceManual