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MaintenanceandServiceGuide

HPCompaqnw8440NotebookPCHPCompaqne8430Not.ebookPCHP

Compaqnx8420NotebookPCDocumentPartNumber:417790-002

September2006

Thisguideisatroubleshootingreferenceusedformaintaining

andservicingthecomputer.Itprovidescomprehensive

informationonidentifyingcomputerfeatures,components,and

spareparts;troubleshootingcomputerproblems;andperforming

computerdisassemblyprocedures.

?Copyright2006Hewlett-PackardDevelopmentCompany,

L.P.MicrosoftandWindowsareU.S.registeredtrademarksof

MicrosoftCorporation.IntelandCorearetrademarksorregistered

trademarksofIntelCorporationoritssubsidiariesintheUnited

Statesandother

countries.Bluetoothisatrademarkownedbyitsproprietor

andusedbyHewlett-PackardCompanyunderlicense.SDLogoisa

trademarkofitsproprietor.JavaisatrademarkofSun

MicrosystemsTnc.

Theinformationcontainedhereinissubjecttochangewithout

notice.TheonlywarrantiesforHPproductsandservicesareset

forthintheexpresswarrantystatementsaccompanyingsuch

productsandservices.Nothinghereinshouldbeconstruedas

constitutinganadditionalwarranty.HPshallnotbeliablefor

technicaloreditorialerrorsoromissionscontained

herein.MaintenanceandServiceGuide

HPCompaqnw8440NotebookPC

HPCompaqnc8430NotebookPC

HPCompaqnx8420NotebookPC

SecondEdition:September2006

FirstEdition:June2006

DocumentPartNumber:417790-002

Contents

1ProductDescription

1.1

1.2

1.3

1.4

1.5Features

1-2Resettingthe

Computer1-4Power

Management1-

5External

Components1-

6Design

Overview1-

202Troubleshooting

2.IComputer

Setup2-

1

UsingComputer

Setup2-ISelecting

fromtheFileMenu2-

2SelectingfromtheSecurityMenu2-

3SelectingfromtheAdvancedMenu2-

4SelectingfromtheToolsMenu

2-4

2.2Troubleshooting

Flowcharts2-5Maintenance

andServiceGuideiii

Contents

3IllustratedPartsCatalog

3.1

3.2

3.3

3.4

3.5

3.6SerialNumber

Location3-IComputer

MajorComponents3-2Plastics

Kit

3-16MassStorage

Devices3-

18Miscellaneous(NotIllustrated)

3-20SequentialPartNumberListing

3-224RemovalandReplacementPreliminaries

4.ITools

Required

4-1

4.2Service

Considerations4-2

Plastic

Parts

.4-2Cablesand

Connectors4-2

4.3PreventingDamagetoRemovableDrives4-3

4.4PreventingElectrostatic

Damage4-4

4.5PackagingandTransportingPrecautions

4-5

4.6Workstation

Precautions4-6

4.7GroundingEquipmentandMethods

4-7

ivMaintenanceandServiceGuide

Contents

5RemovalandReplacementProcedures

5.1Serial

Number

5-2

5.2DisassemblySequence

Chart5-3

5.3PreparingtheComputerforDisassembly5-

5

5.4Hard

Drive

..5-6

5.5Computer

Feet5-

10

5.60ptical

Drive

5-11

5.YExternalMemory

Module5-13

5.8Bluetooth

Module5-16

5.9Keyboard

5-18

5.lOFan

Assembly

5-23

5.llHeat

Sink

5-28

5.12Processor

5-31

5.13InternalMemory

Module5-33

5.14RTC

Battery

5-35

5.15TouchPad

5-36

5.16MiniCard

Module5-39

5.17Switch

Cover5-

42

5.18Display

Assembly5-45

5.19Top

Cover

5-49

5.20Modem

Module5-53

5.21System

Board5-

55

5.22SystcmBoard

Frame5-62

5.23SerialConnector

Module5-65

5.24USB/Audio

Board5-67

MaintenanceandServiceGuidev

Contents

6Specifications

AScrewListing

BSoftwareBackupandRecoveryCDisplayComponent

RecyclingDConnectorPinAssignmentsEPowerCordSet

RequirementsIndex

viMaintenanceandServiceGuide

1

ProductDescription

TheHPCompaqr.w8440NotebookPC,HPCompaqnc8430NotebookPC,

andIIPCompaqnx8420NotebookPCofferadvancedmodularity,Intel?

Core?Duoprocessors,andextensivemultimediasupport.

HPCompaqnw8440NotebookPC,HPCompaqnc8430

NotebookPC,andHPCompaqnx8420NotebookPC

MaintenanceandServiceGuidel-1

ProductDescription

1.IFeatures

■Thefollowingprocessors,varyingbycomputermodel:

□IntelCoreDuoT2600(2.17-GIIz)□IntelCoreDuoT2500(2.00-

GHz)QIntelCoreDuoT2400(1.83-GHz)□IntelCoreDuoT2300(1.66-

GHz)BThefollowingdisplaysareavailable,varyingby

computermodel:

□15.4-inch,WUXGA,TFT(1920X1200)withover16.8million

colorswithAntiGlare

16.8millioncolorswithAntiGlarel6.8millioncolorswith

AntiGlareU15.4-inch,WSXGA,TFT(1680X1050)withoverQ15.4-

inch,WXGA+,TFT(1440X900)withover■

■120-,100-,80-,and60-GBhigh-capacityharddrive,varying

bycomputermode1256-MBDDR2synchronousDRAM(SDRAM)at533MHz

and667MHz,expandableto4.0GBMicrosoft?Windows?XP

Profess!onalFul1-sizeWindowskeyboardwithnumerickeypadTouchPad

andpointingstickpointingdevices,includingadedicated

verticalscrollregion(selectmodelsonly)Integrated10Base-

T/100Base-TXEthernetlocalareanetwork(LAN)networkinterface

card(NIC)withRJ-45jacklntegratedhigh-speed56KmodemwithRJ-

11jack

1-2MaintenanceandServiceGuide

ProductDescription

■IntegratedwirelesssupportforMiniCardIEEE802.lla/b/g

or802.llb/gWirelessLAN(WLAN)deviceSupportforoneTypeIor

TypeIIPCCardslot,withsupportforboth32-bit(CardBus)and

16-bitPCCards,varyingbycomputermodelExternal90-wattAC

adapterwith3-wirepowercord8-cellLi-JonbatteryStereo

speakersVolumeup,volumemute,andvolumedownbuttonsSupportfor

thefollowingopticaldrives:

□DVD±RWandCD-RWDouble-LayerComboDriveQDVD/CD-RWCombo

Drive□DVD-ROMdriveHConnectors:

□Accessorybattery□Audio-in(microphone)□Audio-out

(headphone)QDigitalmediaslotQDockingconnector□External

monitor□IEEE1394口RJT1(modem)口燈-45(network)□S-Video-

outQSmartAdapterpower□ThreeUniversalSerialBus(USB)v.2.0

MaintenanceandServiceGuidel-3

ProductDescription

1.2ResettingtheComputer

Ifthecomputeryouareservicinghasanunknownpassword,

followthestepsbelowtoresetthepassword.Thesestepsalso

clearCMOS.\Thefollowingstepswillnotclearanunknownpassword

ifthe

stringentsecurityoptionhasbeenenabledintheBIOS.If

stringentsecurityisenabled,thesystemboardmustbe

replacedtoresetanunknownpassword.RefertoSection5.23,

“SerialConnectorModule,“formoreinformationonreplacingthe

systemboard.

Beforereplacingthesystemboard,performthestepsbelowto

makesurestringentsecurityhasbeenproperlyenabled.

Enablingstringentsecurityprovidesenhancedprotectionfor

thepower-onpasswordandadministratorpasswordandotherforms

ofpower-onauthorization.Stringentsecurityisenabled/disabled

byaccessingthePasswordOptionsmenuintheComputerSetup

utility.RefertoSection2.1,aComputerSetup,“formore

information.

1.Preparethecomputerfordisassembly(refertoSection5.3,

uPreparingtheComputerforDisassembly,nformore

information).Removethereal-timeclock(RTC)battery(refer

toSection5.14,“RTCBattery,“formoreinformationonremoving

andreplacingtheRTCbattery).

2.Waitapproximately5minutes.

3.ReplacetheRTCbatteryandreassemblethecomputer.

4.ConnectACpowertothecomputer.Donotreinsertany

batteriesatthistime.

5.Turnonthecomputer.

AllpasswordsandallCMOSsettingshavebeencleared.

1-4MaintenanceandServiceGuide

ProductDescription

1.3PowerManagement

Thecomputercomeswithpowermanagementfeaturesthatextend

batteryoperatingtimeandconservepower.Thecomputersupports

thefollowingpowermanagementfeatures:■

■StandbyllibernationSettingcustomizationbytheuserllotkeys

forsettingthelevelofperformanceBatterycalibrationLidswitch

standby/resumoPowerbuttonAdvancedConfigurationandPower

Management(ACPM)compliance

MaintenanceandServiceGuidel-5

ProductDescription

1.4ExternalComponents

Theexternalcomponentsonthefrontofthecomputerareshown

belowanddescribedinTable1-1.

FrontComponents

Table1-1

FrontComponents

Item

1ComponentWire1ess1ightFunctionOn:Anintegratedwireless

device,suchas

awirelesslocalareanetwork(LAN)device

and/oraBluetooth?device,isturnedon.

■On:Thecomputerison.

■Blinking:Thecomputerisinstandby.

■Blinkingrapidly:AnHPSmartACAdapterwithahigherpower

rating

shouldbeconnected.

■Off:Thecomputerisofforinhibernation.2Powerlight

1-6MaintenanceandServiceGuide

ProductDescription

Table1-1

FrontComponents(Continued)

Item

3ComponentBatterylightFunctionHAmber:Abatteryischarging.

■Green:Abatteryisclosetofullchargecapacity.

■Blinkingamber:Abatterythatistheonlyavailablepower

sourcehasreacheda

low-batterycondition.Whenthebattery

reachesacriticallow-batterycondition,

thebatterylightbeginsblinkingmore

quickly.

■Off:Ifthecomputerisconnectedtoanexternalpower

source,thelightisturned

offwhenallbatteriesinthecomputerare

fullycharged.Ifthecomputerisnot

connectedtoanexternalpowersource,

thelightisturnedoffuntilthebattery

reachesalow-batterycondition.

■Blinkinggreen:Theharddriveoroptical

driveisbeingaccessed.

■Amber:HPMobileDataProtectionhastemporarilyparkedthe

harddrive.

Opensthecomputer.4Drivclight5Displayrelease

latchMaintenanceandServiceGuidel-7

ProductDescription

Theexternalcomponentsontherightsideofthecomputerare

shownbelowanddescribedinTable1-2.

Right-SideComponents

Table1-2

Right-SideComponents

Item

1ComponentAudio-out

(headphone)jackFunctionProducescomputersoundwhenconnected

tooptionalpowerstereospeakers,

headphones,earbuds,aheadset,or

televisionaudio.

Recordssound

Connectsanoptionalcomputerheadset

microphone,stereoarraymicrophone,or

monauralmicrophone.

ConnectUSB1.1-and2.O-compliant

devicestothecomputerusingastandard

USBcable,orconnectanoptionalExternal

MultiBayITtothecomputer.TheMu11iBayIT

mustalsobeconnectedtoanexternal

powersource.

Supportsanopticaldisc.Thetypeofoptical

drivevariesbymodel.

Connectsanoptionalserialdevice.23InternalmicrophoneAudio-

in(microphone)jackUSBports(2)4560pticaldriveSerialportl-

8MaintenanceandServiceGuide

ProductDescription

Theexternalcomponentsontherearpanelofthecomputerare

shownbelowanddescribedinTable1-3.

RearPanelComponents

Table1-3

RearPanelComponents

Item

1

2

3ComponentBatterybaySmartadapterpowerconnectorExternal

monitorportFunctionHoldsabattery.ConnectsanACadapteroran

optionalpoweradapter.ConnectsanoptionalVGAexternalmonitor

orprojector.

MaintenanceandServiceGuidel-9

ProductDescription

Theexternalcomponentsontheleftsideofthecomputerare

shownbelowanddescribedinTablel-4.

Left-SideComponents

Table1-4

Left-SideComponents

Item

1ComponentsecuritycableslotFunctionAttachesanoptional

securitycabletothe

computer.

A

2

3

4RJ-45(network)jackRJ-11(modem)j￡ckS-Video-out

jackSecuritysolutionsaredesignedtoactasdeterrents.These

deterrentsmaynotpreventaproductfrombeingmishandledor

stolen.Connectsanoptionalnetworkcable.Connectsthemodem

cable.ConnectsanoptionalS-Videodevice,such

asatelevision,VCR,camcorder,projector,orvideocapture

card.

1-lOMaintenanceandServiceGuide

ProductDescription

Table1-4

Left-SideCompuiieiiLs(CoiiLinued)

Item

5ComponentExhaustventFunctionProvidesairflowtocool

internal

components.

ATopreventoverheating,donot

obstructvents.Usethecomputer

onlyahard,flatsurface.Donotallow

ahardsurface,suchasanadjoining

printer,orasoftsurface,suchas

pillowsorthickrugsorclothing,to

blockairflow.

61394portConnectsanoptional1394adevicesuchas

ascanner,digitalcamera,ordigital

camcorder.

ConnectsUSB1.1-and2.O-compliant

devicestothecomputerusingastandard

USBcable,orconnectsanoptional

ExternalMultiBayIItothecomputer.The

MultiBayIImustalsobeconnectedtoan

externalpowersource.

SupportsoptionalsmartcardsandJava?

Cards.

SupportsoptionalTypeIorTypeII32-bit

(CardBus)or16-bitPCCards.

SupportsSecureDigital(SD)MemoryCardsand

MultiMediaCards.7USBport8910SmartcardslotPCCardslotDigital

MediaSlot

MaintenanceandServiceGuidel-11

ProductDescription

Thestandardkeyboardcomponentsofthecomputerareshown

belowanddescribedinTable1-5.

StandardKeyboardComponents

1-12MaintenanceandServiceGuide

ProductDescription

Table1-5

StandardKeyboardComponents

Item

1Componentfltof12keys(12)FunctionPerformsystemand

applicationtasks.

Whencombinedwiththefnkey,severe.1

keysandbuttonsperformadditionaltasks

ashotkeys.

Enablescapslockandturnsonthecaps

locklight.

Executesfrequentlyusedsystem

functionswhenpressedincombination

withafunctionkeyortheesckey.

InWindows,displaystheWindows

Startmenu.

InWindows,displaysashortcutmenu

foritemsbeneaththepointer.

Movesthecursoraroundthescreen.

InWindows,canbeusedlikethekeys

onanexternalnumerickeypad.

Enablesnumericlock,turnsonthe

embeddednumerickeypad,andturns

onthenumlocklight.23capslockkeyfnkey45678Windowslogo

keyWindowsapplicationskeyArrowkeysKeypcdkeysnumlockkey

MaintenanceandServiceGuidel_13

ProductDescription

Thecomputertopcomponentsareshownbelowanddescribedin

Table1-6.

TopComponents,Part1

1-14MaintenanceandServiceGuide

ProductDescription

Table1-6

TopComponents

Item

1ComponentPowerbuttonFunctionWhenthecomputeris:

■Off,presstoturnonthecomputer.

■On,brieflypresstoinitiatehibernation.

■Instandby,brieflypresstoresumefromstandby.

■Inhibernation,brieflypresstorestorefromhibernation.

Ifthesystemhasstoppedrespondingand

Windowsshutdownprocedurescannotbe

used,pressandholdfor5secondstoturn

offthecomputer.

2

3InfoCenterbuttonWirelessbutton

(withwirelesslight)LaunchesInfoCenter,whichenablesyouto

openvarioussoftwaresolutions.Turnsthewirelessfunctionality

onoroff,butdoesnotcreateawirelessconnection.

?Toestablishawirelessconnection,

awirelessnetworkmustalreadybe

setup.

4

5

6

7

8

9PresentationbuttonCapslocklightNumlocklightVolumemute

buttonVolumedownbuttonVolumeupbuttonStartsthepresentation

feature.On:capslockison.On:numlockorthenumerickeypadis

on.Mutesorrestoresspeakervolume,decreasesspeaker

volume.Increasesspeakervolume.

MaintenanceandServiceGuidel-15

ProductDescription

Thecomputertopcomponentsareshownbelowanddescribedin

Table1-7.

TopComponents,Part2

1-16MaintonancoandServiceGuido

ProductDescription

Table1-7

TopComponents

Item

IComponentDisplaylidswitchFunctionBIfthecomputeris

closedwhi1eon,turns

offthedisplay.

■Ifthecomputerisopenedwhileinstandby,turnsonthe

computer

(resumesfromstandby).

Movesthepointerandselectsoractivates

itemsonthescreen.

Producestereosound.

Movesthepointerandselectsoractivates

itemsonthescreen.Canbesettoperform

othermousefunctions,suchasscrolling,

selecting,anddouble-clicking.

Functionliketheleft,middle,andright

buttonsonanexternalmouse.

AllowsafingerprintlogontoWindows

insteadofusingapassword.

ScrolIsupordown.

Functionliketheleft,middle,andrightbuttonsonan

externalmouse.234Pointingstick(selectmodelsonly)Stereo

speakers(2)TouchPad5678TouchPadbuttonsFingerprintreaderTouchPad

scrollzonePointingstickbuttons(selectmodelsonly)

MaintenanceandServiceGuidel_17

ProductDescription

Theexternalcomponentsonthebottomofthecomputerare

shownbelowanddescribedinTable1-8.

BottomComponents

1-18MaintenanceandServiceGuide

ProductDescription

Table1-8

BottomComponents

Item

1

2

3

4

5

6

7ComponentBatterybayBatteryreleaselatches(2)Accessory

batteryconnectorMemorymodulecompartmentHarddrivebayDocking

connectorExhaustventFunctionHoldsthebattery.Securethebattery

inthebatterybay.ConnectsanoptionalHPUltra-CapacityBattery

orHPExtendedLifeBattery.Containsonememoryslotthatsupports

replaceablememorymodules.Holdstheprimaryharddrive.Connects

thecomputertoanoptionaldockingdevice.Providesairflowto

coolinternal

components.

ATopreventoverheating,donot

obstructvents.Usethecomputer

onlyahard,flatsurface.Donot

allowahardsurface,suchasan

adjoiningprinter,orasoft

surface,suchaspillowsorthickrugsorclothing,toblock

airflow.

MaintenanceandServiceGuidel-19

ProductDescription

1.5DesignOverview

Thissectionpresentsadesignoverviewofkeypartsand

featuresofthecomputer.RefertoChapter3,uIllustratedParts

Catalog,“toidentifyreplacementparts,andChapter5,uRemoval

andReplacementProcedures,“fordisassemblysteps.

Thesystemboardprovidesthefollowingdeviceconnections:■

■AudioDigitalMediaSlotDisplayHarddrivelntelCoreDuo

processorsKeyboard,pointingstick,andTouchPadMemorymodulesMini

CardmoduleOpticaldrivePCCardSmartAdapterACadapterSmart

cardACAUTION:Toproperlyventilatethecomputer,allowatleasta

7.6-cm

(3-inch)clearanceontheleftandrightsidesofthecomputer.

Thecomputerusesanelectricfanforventilation.Thefanis

controlledbyatemperaturesensorandisdesignedtoturnon

automaticallywhenhightemperatureconditionsexist.These

conditionsareaffectedbyhighexternaltemperatures,system

powerconsumption,powermanagement/batteryconservation

configurations,batteryfastcharging,andsoftware.Exhaustair

isdisplacedthroughtheventilationgrilllocatedontheleft

sideofthecomputer.

1-20MaintenanceandServiceGuide

2

Troubleshoot!ngAWARNING:Onlyauthorizedtechnicianstrained

byHPshouldrepair

thisequipment.Alltroubleshootingandrepairproceduresare

detailedtoallowonlysubassembly-/module-levelrepair.Because

ofthe

complexityoftheindividualboardsandsubassemblies,donot

attempttomakerepairsatthecomponentlevelormodificationsto

anyprintedwiringboard.Improperrepairscancreateasafety

hazard.Anyindicationofcomponentreplccemcntorprintedwiring

boardmodificationmayvoidanywarrantyorexchangeallowances.

2.IComputerSetup

ComputerSetupisasysteminformationandcustomization

utilitythatcanbeusedevenwhentheoperatingsystemisnot

workingorwillnotload.Thisutilityincludessettingsthatare

notavailableinWindows.

UsingComputerSetup

InformationandsettingsinComputerSetupareaccessedfrom

theMain,Security,Advanced,orToolsmenus:

1.Turnonorrestartthecomputer.Pressf10whilethe

F10=R0M-BasedSetupmessageisdisplayedin

thelower-leftcornerofthescreen.

□Tochangethelanguage,usethecursorcontrolkeys

tonavigatetotheAdvancedmenu.

□Toviewnavigationinformation,pressfl.

□ToreturntotheComputerSetupmenu,pressesc.

MaintenanceandServiceGuidc2-1

Troubleshooting

2.SelecttheMain,Security,Advanced,orToolsmenu.

3.TocloseComputerSetupandrestartthecomputer:

□SelectExit>ExitSavingChanges,andthenpressenter.-

or-

□SelectExit>ExitDiscardingChanges,andthenpressenter.

-or-

□SelectExit>LoadSetupDefaults,andthenpressenter.

4.Whenyouarepromptedtoconfirmyouraction,press

f10.SelectingfromtheFileMenu

Table2-1

FileMenu

Select

SystemInformationToDoThisHChangethesystemtimeand

systemdate.

■Viewidentificationinformationaboutthecomputer.

■Viewspecificationinformationabouttheprocessor,memory

andcachesize,andsystemROM.

2-2MaintenanceandServiceGuide

Troubleshooting

SelectingfromtheSecurityMenu

Table2-2

SecurityMenu

Select

AdministratorPassword

Power-onPassword

DriveLockPasswordsToDoThisEnter,change,ordeletean

Administratorpassword.Enter,change,ordeleteapower-on

password.Enable/disab1eDriveLock;changeaDriveLock

userormasterpassword.

?DriveLockSettingsareaccessibleonly

whenyouenterComputerSetupbyturning

on(notrestarting)thecomputer.

PasswordOptions

(Passwordoptionscan

beselectcdonlywhen

apower-onpassword

hasbeenset.)Enable/disableBQuickLock.■QuickLockon

Standby.■QuickBlank.

撤ToenableQuickLockonStandbyor

QuickBlank,youmustfirstenable

QuickLock.

DeviceSecurityEnable/disable

■Diskettedrivestartup.*

■CD-ROMordiskettestartup.

?SettingsforaDVD-ROMcanbeentered

intheCD-ROMfield.*NotapplicabletoSuperDiskLS-120drives.

MaintenanceandServiceGuide2-3

Troubleshooting

SelectingfromtheAdvancedMonuTable2-3

AdvancedMenu

Select

Language

BootOrderToDoThisChangetheComputerSetup

language.Enable/disab1eMultiBoot,whichsetsastartup

sequencethatcanincludemostbootabledevices

andmediainthesystem.

Allowselectronicandinformationtechnologyto

beaccessibletopeoplewithvaryingrangesof

abilities.

Displaystheamountofvideomemoryavailableonthe

computer.Access!bi1ityOptionsVideoMemory

SelectingfromtheToolsMenu

Table2-4

ToolsMenu

Select

HardDriveSelfTcstToDoThisRunaquickcomprehensiveself

testonharddrivesinthesystemthatsupportthetestfeatures.

2-4MaintenanccandServiceGuido

Troubleshooting

2.2TroubleshootingFlowcharts

Table2-5

TroubleshootingFlowchartsOverview

Flowchart

2.1

2.2

2.3

2.4

2.5

2.6

2.7

2.8

2.9

2.10

2.11

2.12

2.13Description"Flowchart2.1—Initial

Troub1eshootingn“Flowchart2.2—NoPower,Part1"Flowchart

2.3一NoPower,Part2”“Flowchart2.4-NoPower,Part

3”Flowchart2.5—NoPower,Part4”aFlowchart2.6—NoVideo,

Part1”uFlowchart2.7—NoVideo,Part2""Flowchart2.8—

NoiifuuuliouiiigDockingDevice(ifapplict.ble)“Flowehurl2.9-No

OperatingSystem(OS)Loading”uFlowchart2.10-NoOSLoading,

HardDrive,Part1"“Flowchart2.11—NoOSLoading,HardDrive,

Part2"“Flowchart2.12—NoOSLoading,HardDrive,Part

3”“Flowchart2.13-NoOSLoading,DisketteDrive”

MaintenanceandServiceGuide2-5

Troubleshooting

Table2-5

TroubleshootingFlowchartsOverview(Continued)Flowchart

2.14

2.15

2.16

2.17

2.18

2.19

2.20Description"Flowchart2.14-NoOSLoading,Optical

Drive”Flowchart2.15—NoAudio,Part1"aFlowchart2.16—No

Audio,Part2”uFlowchart2.17—Nonfunctioning

Device,,