Lenovo M4350 User guide

LenovoM4350

UserGuide

MachineTypes:90AGand10154

Note:Beforeusingthisinformationandtheproductitsupports,besuretoreadandunderstandthe

“Importantsafetyinformation”onpageiii

andAppendixA“Notices”onpage43.

FirstEdition(August2013)

©CopyrightLenovo2013.

LIMITEDANDRESTRICTEDRIGHTSNOTICE:IfdataorsoftwareisdeliveredpursuantaGeneralServicesAdministration

“GSA”contract,use,reproduction,ordisclosureissubjecttorestrictionssetforthinContractNo.GS-35F-05925.

Contents

Importantsafetyinformation.....iii

Serviceandupgrades.............iii

Staticelectricityprevention...........iii

Powercordsandpoweradapters........iv

Extensioncordsandrelateddevices.......iv

Plugsandoutlets...............iv

Externaldevices...............v

Heatandproductventilation..........v

Operatingenvironment............vi

Modemsafetyinformation...........vi

Lasercompliancestatement..........vi

Powersupplystatement...........vii

Cleaningandmaintenance..........vii

Chapter1.Productoverview......1

Specications................1

Locations..................1

Locatingconnectors,controls,andindicators

onthefrontofyourcomputer........2

Locatingconnectorsontherearofyour

computer................3

Locatingpartsonthesystemboard.....4

Chapter2.Youandyourcomputer...7

Accessibilityandcomfort...........7

Arrangingyourworkspace.........7

Comfort................7

Glareandlighting.............8

Aircirculation..............8

Electricaloutletsandcablelengths......8

Movingyourcomputertoanothercountryor

region...................9

Voltage-selectionswitch..........9

Replacementpowercords.........9

Chapter3.Security..........11

Lockingthecomputercover.........11

Attachinganintegratedcablelock.......12

Usingpasswords..............12

BIOSpasswords............12

Windowspasswords..........13

Usingandunderstandingrewalls.......13

Chapter4.Recoveryinformation...15

RecoveryinformationfortheWindows8operating

system..................15

UsingRescueSystem............16

Chapter5.UsingtheSetupUtility

program................19

StartingtheSetupUtilityprogram.......19

Viewingandchangingsettings........19

Usingpasswords..............19

Passwordconsiderations.........20

Power-OnPassword..........20

AdministratorPassword.........20

HardDiskPassword...........20

Setting,changing,anddeletingapassword.20

Enablingordisablingadevice........21

Selectingastartupdevice..........21

Selectingatemporarystartupdevice....21

Selectingorchangingthestartupdevice

sequence...............21

EnablingErPcompliancemode........22

ExitingtheSetupUtilityprogram.......22

Chapter6.Preventingproblems...25

Keepingyourcomputercurrent........25

Gettingthelatestdevicedriversforyour

computer...............25

Updatingyouroperatingsystem......25

Cleaningandmaintenance..........26

Basics................26

Cleaningyourcomputer.........26

Goodmaintenancepractices.......27

Movingyourcomputer...........28

Chapter7.Troubleshootingand

diagnostics..............29

Basictroubleshooting............29

Troubleshootingprocedure..........30

Troubleshooting..............30

Audioproblems............31

CDproblems.............32

DVDproblems.............33

Intermittentproblems..........34

Keyboard,mouse,orpointingdevice

problems...............34

Monitorproblems............35

Networkingproblems..........37

Performanceandlockupproblems.....39

Printerproblems............41

Serialportproblems...........41

USBproblems.............42

©CopyrightLenovo2013

i

AppendixA.Notices..........43

Trademarks................44

AppendixB.Regulatory

information..............45

Exportclassicationnotice..........45

Televisionoutputnotice...........45

Electronicemissionsnotices.........45

FederalCommunicationsCommission

DeclarationofConformity........45

Additionalregulatoryinformation.......47

AppendixC.WEEEandrecycling

statements..............49

ImportantWEEEinformation.........49

Recyclinginformation............49

RecyclinginformationforBrazil........50

BatteryrecyclinginformationforTaiwan.....50

BatteryrecyclinginformationfortheEuropean

Union..................50

AppendixD.RestrictionofHazardous

SubstancesDirective(RoHS).....53

EuropeanUnionRoHS...........53

ChinaRoHS................53

TurkishRoHS...............53

UkraineRoHS...............54

IndiaRoHS................54

AppendixE.ChinaEnergyLabel...55

AppendixF.ENERGYSTARmodel

information..............57

iiLenovoM4350UserGuide

Importantsafetyinformation

CAUTION:

Beforeusingthismanual,besuretoreadandunderstandalltherelatedsafetyinformationforthis

product.RefertotheinformationinthissectionandthesafetyinformationintheSafety,Warranty,and

SetupGuidethatyoureceivedwiththisproduct.Readingandunderstandingthissafetyinformation

reducestheriskofpersonalinjuryanddamagetoyourproduct.

IfyounolongerhaveacopyoftheSafety,Warranty,andSetupGuide,youcanobtainaPortableDocument

Format(PDF)versionfromtheLenovo

®

SupportWebsiteathttp://support.lenovo.com.TheLenovoSupport

WebsitealsoprovidestheSafety,Warranty,andSetupGuideandthisUserGuideinadditionallanguages.

Serviceandupgrades

DonotattempttoserviceaproductyourselfunlessinstructedtodosobytheCustomerSupportCenteror

yourdocumentation.OnlyuseaServiceProviderwhoisapprovedtorepairyourparticularproduct.

Note:Somecomputerpartscanbeupgradedorreplacedbythecustomer.Upgradestypicallyare

referredtoasoptions.ReplacementpartsapprovedforcustomerinstallationarereferredtoasCustomer

ReplaceableUnits,orCRUs.Lenovoprovidesdocumentationwithinstructionswhenitisappropriatefor

customerstoinstalloptionsorreplaceCRUs.Youmustcloselyfollowallinstructionswheninstallingor

replacingparts.TheOffstateofapowerindicatordoesnotnecessarilymeanthatvoltagelevelsinsidea

productarezero.Beforeyouremovethecoversfromaproductequippedwithapowercord,alwaysmake

surethatthepoweristurnedoffandthattheproductisunpluggedfromanypowersource.

Althoughtherearenomovingpartsinyourcomputerafterthepowercordhasbeendisconnected,the

followingwarningsarerequiredforyoursafety.

CAUTION:

Hazardousmovingparts.Keepngersandotherbodypartsaway.

CAUTION:

BeforereplacinganyCRUs,turnoffthecomputerandwaitthreetoveminutestoletthecomputer

coolbeforeopeningthecover.

Staticelectricityprevention

Staticelectricity,althoughharmlesstoyou,canseriouslydamagecomputercomponentsandoptions.

Improperhandlingofstatic-sensitivepartscancausedamagetothepart.Whenyouunpackanoption

orCRU,donotopenthestatic-protectivepackagecontainingthepartuntiltheinstructionsdirectyou

toinstallit.

©CopyrightLenovo2013

iii

WhenyouhandleoptionsorCRUs,orperformanyworkinsidethecomputer,takethefollowingprecautions

toavoidstatic-electricitydamage:

•Limityourmovement.Movementcancausestaticelectricitytobuilduparoundyou.

•Alwayshandlecomponentscarefully.Handleadapters,memorymodules,andothercircuitboardsbythe

edges.Nevertouchexposedcircuitry.

•Preventothersfromtouchingcomponents.

•Whenyouinstallastatic-sensitiveoptionorCRU,touchthestatic-protectivepackagecontainingthe

parttoametalexpansion-slotcoverorotherunpaintedmetalsurfaceonthecomputerforatleasttwo

seconds.Thisreducesstaticelectricityinthepackageandyourbody.

•Whenpossible,removethestatic-sensitivepartfromthestatic-protectivepackagingandinstallthepart

withoutsettingitdown.Whenthisisnotpossible,placethestatic-protectivepackagingonasmooth,

levelsurfaceandplacethepartonit.

•Donotplacethepartonthecomputercoverorothermetalsurface.

Powercordsandpoweradapters

Useonlythepowercordsandpoweradapterssuppliedbytheproductmanufacturer.

Thepowercordsshallbesafetyapproved.ForGermany,itshallbeH05VV-F,3G,0.75mm

2

,orbetter.For

othercountries,thesuitabletypesshallbeusedaccordingly.

Neverwrapapowercordaroundapoweradapterorotherobject.Doingsocanstressthecordinwaysthat

cancausethecordtofray,crack,orcrimp.Thiscanpresentasafetyhazard.

Alwaysroutepowercordssothattheywillnotbewalkedon,trippedover,orpinchedbyobjects.

Protectpowercordandpoweradaptersfromliquids.Forinstance,donotleaveyourpowercordorpower

adapternearsinks,tubs,toilets,oronoorsthatarecleanedwithliquidcleansers.Liquidscancausea

shortcircuit,particularlyifthepowercordorpoweradapterhasbeenstressedbymisuse.Liquidsalsocan

causegradualcorrosionofpowercordterminalsand/ortheconnectorterminalsonapoweradapter,

whichcaneventuallyresultinoverheating.

Alwaysconnectpowercordsandsignalcablesinthecorrectorderandensurethatallpowercord

connectorsaresecurelyandcompletelypluggedintoreceptacles.

Donotuseanypoweradapterthatshowscorrosionattheacinputpinsorshowssignsofoverheating(such

asdeformedplastic)attheacinputoranywhereonthepoweradapter.

Donotuseanypowercordswheretheelectricalcontactsoneitherendshowsignsofcorrosionor

overheatingorwherethepowercordappearstohavebeendamagedinanyway.

Extensioncordsandrelateddevices

Ensurethatextensioncords,surgeprotectors,uninterruptiblepowersupplies,andpowerstripsthatyouuse

areratedtohandletheelectricalrequirementsoftheproduct.Neveroverloadthesedevices.Ifpowerstrips

areused,theloadshouldnotexceedthepowerstripinputrating.Consultanelectricianformoreinformation

ifyouhavequestionsaboutpowerloads,powerrequirements,andinputratings.

Plugsandoutlets

Ifareceptacle(poweroutlet)thatyouintendtousewithyourcomputerequipmentappearstobedamaged

orcorroded,donotusetheoutletuntilitisreplacedbyaqualiedelectrician.

ivLenovoM4350UserGuide

Donotbendormodifytheplug.Iftheplugisdamaged,contactthemanufacturertoobtainareplacement.

Donotshareanelectricaloutletwithotherhomeorcommercialappliancesthatdrawlargeamountsof

electricity;otherwise,unstablevoltagemightdamageyourcomputer,data,orattacheddevices.

Someproductsareequippedwithathree-prongedplug.Thisplugtsonlyintoagroundedelectricaloutlet.

Thisisasafetyfeature.Donotdefeatthissafetyfeaturebytryingtoinsertitintoanon-groundedoutlet.If

youcannotinserttheplugintotheoutlet,contactanelectricianforanapprovedoutletadapterortoreplace

theoutletwithonethatenablesthissafetyfeature.Neveroverloadanelectricaloutlet.Theoverallsystem

loadshouldnotexceed80percentofthebranchcircuitrating.Consultanelectricianformoreinformation

ifyouhavequestionsaboutpowerloadsandbranchcircuitratings.

Besurethatthepoweroutletyouareusingisproperlywired,easilyaccessible,andlocatedclosetothe

equipment.Donotfullyextendpowercordsinawaythatwillstressthecords.

Besurethatthepoweroutletprovidesthecorrectvoltageandcurrentfortheproductyouareinstalling.

Carefullyconnectanddisconnecttheequipmentfromtheelectricaloutlet.

Externaldevices

DonotconnectordisconnectanyexternaldevicecablesotherthanUniversalSerialBus(USB)and1394

cableswhilethecomputerpowerison;otherwise,youmightdamageyourcomputer.Toavoidpossible

damagetoattacheddevices,waitatleastvesecondsafterthecomputerisshutdowntodisconnect

externaldevices.

Heatandproductventilation

Computers,poweradapters,andmanyaccessoriescangenerateheatwhenturnedonandwhenbatteries

arecharging.Alwaysfollowthesebasicprecautions:

•Donotleaveyourcomputer,poweradapter,oraccessoriesincontactwithyourlaporanypartofyour

bodyforanextendedperiodwhentheproductsarefunctioningorwhenthebatteryischarging.Your

computer,poweradapter,andmanyaccessoriesproducesomeheatduringnormaloperation.Extended

contactwiththebodycouldcausediscomfortor,potentially,askinburn.

•Donotchargethebatteryoroperateyourcomputer,poweradapter,oraccessoriesnearammable

materialsorinexplosiveenvironments.

•Ventilationslots,fans,andheatsinksareprovidedwiththeproductforsafety,comfort,andreliable

operation.Thesefeaturesmightinadvertentlybecomeblockedbyplacingtheproductonabed,sofa,

carpet,orotherexiblesurface.Neverblock,cover,ordisablethesefeatures.

Inspectyourdesktopcomputerfordustaccumulationatleastonceeverythreemonths.Beforeinspecting

yourcomputer,turnoffthepowerandunplugthecomputer'spowercordfromtheelectricaloutlet;then

removeanydustfromventsandperforationsinthebezel.Ifyounoticeexternaldustaccumulation,then

examineandremovedustfromtheinsideofthecomputerincludingheatsinkinletns,powersupplyvents,

andfans.Alwaysturnoffandunplugthecomputerbeforeopeningthecover.Ifpossible,avoidoperating

yourcomputerwithintwofeetofhigh-trafcareas.Ifyoumustoperateyourcomputerinornearahigh-trafc

area,inspectand,ifnecessary,cleanyourcomputermorefrequently.

Foryoursafetyandtomaintainoptimumcomputerperformance,alwaysfollowthesebasicprecautions

withyourdesktopcomputer:

•Keepthecoverclosedwheneverthecomputerispluggedin.

•Regularlyinspecttheoutsideofthecomputerfordustaccumulation.

©CopyrightLenovo2013

v

•Removedustfromventsandanyperforationsinthebezel.Morefrequentcleaningsmightberequiredfor

computersindustyorhigh-trafcareas.

•Donotrestrictorblockanyventilationopenings.

•Donotstoreoroperateyourcomputerinsidefurniture,asthismightincreasetheriskofoverheating.

•Airowtemperaturesintothecomputershouldnotexceed35°C(95°F).

•Donotinstallairltrationdevices.Theymayinterferewithpropercooling.

Operatingenvironment

Theoptimalenvironmentinwhichtouseyourcomputeris10°C-35°C(50°F-95°F)withhumidityranging

between35%and80%.Ifyourcomputerisstoredortransportedintemperatureslessthan10°C(50°F),

allowthecoldcomputertoriseslowlytoanoptimaloperatingtemperatureof10°C-35°C(50°F-95°F)before

use.Thisprocesscouldtaketwohoursinextremeconditions.Failuretoallowyourcomputertorisetoan

optimaloperatingtemperaturebeforeusecouldresultinirreparabledamagetoyourcomputer.

Ifpossible,placeyourcomputerinawell-ventilatedanddryareawithoutdirectexposuretosunshine.

Keepelectricalappliancessuchasanelectricfan,radio,high-poweredspeakers,airconditioner,and

microwaveovenawayfromyourcomputerbecausethestrongmagneticeldsgeneratedbythese

appliancescandamagethemonitoranddataontheharddiskdrive.

Donotplaceanybeveragesontopoforbesidethecomputerorotherattacheddevices.Ifliquidisspilledon

orinthecomputeroranattacheddevice,ashortcircuitorotherdamagemightoccur.

Donoteatorsmokeoveryourkeyboard.Particlesthatfallintoyourkeyboardcancausedamage.

Modemsafetyinformation

CAUTION:

Toreducetheriskofre,useonlyNo.26AWGorlarger(forexample,No.24AWG)telecommunication

linecordlistedbyUnderwritersLaboratories(UL)orcertiedbytheCanadianStandardsAssociation

(CSA).

Toreducetheriskofre,electricalshock,orinjurywhenusingtelephoneequipment,alwaysfollowbasic

safetyprecautions,suchas:

•Neverinstalltelephonewiringduringalightningstorm.

•Neverinstalltelephonejacksinwetlocationsunlessthejackisspecicallydesignedforwetlocations.

•Nevertouchuninsulatedtelephonewiresorterminalsunlessthetelephonelinehasbeendisconnectedat

thenetworkinterface.

•Usecautionwheninstallingormodifyingtelephonelines.

•Avoidusingatelephone(otherthanacordlesstype)duringanelectricalstorm.Theremaybearemote

riskofelectricshockfromlightning.

•Donotusethetelephonetoreportagasleakinthevicinityoftheleak.

Lasercompliancestatement

viLenovoM4350UserGuide

CAUTION:

Whenlaserproducts(suchasCD-ROMs,DVDdrives,beropticdevices,ortransmitters)are

installed,notethefollowing:

•Donotremovethecovers.Removingthecoversofthelaserproductcouldresultinexposureto

hazardouslaserradiation.Therearenoserviceablepartsinsidethedevice.

•Useofcontrolsoradjustmentsorperformanceofproceduresotherthanthosespeciedherein

mightresultinhazardousradiationexposure.

DANGER

SomelaserproductscontainanembeddedClass3AorClass3Blaserdiode.Notethefollowing:

Laserradiationwhenopen.Donotstareintothebeam,donotviewdirectlywithoptical

instruments,andavoiddirectexposuretothebeam.

Powersupplystatement

Neverremovethecoveronapowersupplyoranypartthathasthefollowinglabelattached.

Hazardousvoltage,current,andenergylevelsarepresentinsideanycomponentthathasthislabelattached.

Therearenoserviceablepartsinsidethesecomponents.Ifyoususpectaproblemwithoneoftheseparts,

contactaservicetechnician.

Cleaningandmaintenance

Keepyourcomputerandworkspaceclean.Shutdownthecomputerandthendisconnectthepower

cordbeforecleaningthecomputer.Donotsprayanyliquiddetergentdirectlyonthecomputeroruse

anydetergentcontainingammablematerialtocleanthecomputer.Spraythedetergentonasoftcloth

andthenwipethecomputersurfaces.

©CopyrightLenovo2013

vii

viiiLenovoM4350UserGuide

Chapter1.Productoverview

Thischapterprovidesinformationaboutthecomputerspecications,locationsofconnectors,andparts

onthesystemboard.

Specications

Thissectionliststhespecicationsforyourcomputer.

Preinstalledoperatingsystem

Yourcomputerispreinstalledwithoneofthefollowingoperatingsystems:

•Microsoft

®

Windows

®

8operatingsystem

•DOS

Environment

•Airtemperature:

Operating:10°Cto35°C(50°Fto95°F)

Storageinoriginalshippingpackage:-40°Cto60°C(-40°Fto140°F)

Storagewithoutpackage:-10°Cto60°C(14°Fto140°F)

•Humidity:

Operating:20%to80%(non-condensing)

Non-operating:20%to90%(non-condensing)

•Altitude:

Operating:-15.2to3048m(-50to10000ft)

Storage:-15.2to10668m(-50to35000ft)

Electricalinput

•Inputvoltage:

–Lowrange:

Minimum:100Vac

Maximum:127Vac

Inputfrequencyrange:50to60Hz

Voltage-selectionswitchsetting:115Vac

–Highrange:

Minimum:200Vac

Maximum:240Vac

Inputfrequencyrange:50to60Hz

Voltage-selectionswitchsetting:230Vac

Locations

Thissectionprovidesinformationtohelpyoulocatetheconnectorsonthefrontandrearofyourcomputer

andpartsonthesystemboard.

©CopyrightLenovo2013

1

Locatingconnectors,controls,andindicatorsonthefrontofyour

computer

Figure1“Frontconnector,control,andindicatorlocations”onpage2showsthelocationsoftheconnectors,

controls,andindicatorsonthefrontofyourcomputer.

Figure1.Frontconnector,control,andindicatorlocations

1Harddiskdriveactivityindicator

5USB2.0connector

2Powerswitch6Microphoneconnector

3Powerindicator7Headphoneconnector

4Opticaldriveeject/closebutton8USB2.0connector

2LenovoM4350UserGuide

Locatingconnectorsontherearofyourcomputer

Figure2“Rearconnectorlocations”onpage3showsthelocationsoftheconnectorsontherearofyour

computer.Someconnectorsontherearofyourcomputerarecolor-codedtohelpyoudeterminewhereto

connectthecablesonyourcomputer.

Figure2.Rearconnectorlocations

1Voltage-selectionswitch(availableonsome

models)

9Audioline-outconnector

2Powercordconnector10Audioline-inconnector

3PS/2mouseconnector11PCIExpressx16graphicscardslot

4PS/2keyboardconnector12PCIExpressx1cardslots(2)

5Serialport13Integratedcablelock(Kensingtonlock)slot

6VGAmonitorconnector

14Padlockloop

7USBconnectors(4)15Optionalserialport

8Microphoneconnector16Ethernetconnector

ConnectorDescription

Audioline-inconnector

Usedtoreceiveaudiosignalsfromanexternalaudiodevice,suchasastereo

system.Whenyouattachanexternalaudiodevice,acableisconnectedbetween

theaudioline-outconnectorofthedeviceandtheaudioline-inconnectorofthe

computer.

Audioline-outconnector

Usedtosendaudiosignalsfromthecomputertoexternaldevices,suchaspowered

stereospeakers(speakerswithbuilt-inampliers),headphones,multimedia

keyboards,ortheaudioline-inconnectoronastereosystemorotherexternal

recordingdevice.

Ethernetconnector

UsedtoattachanEthernetcableforalocalareanetwork(LAN).

Note:TooperatethecomputerwithinFCCClassBlimits,useaCategory5Ethernet

cable.

Chapter1.Productoverview3

ConnectorDescription

Microphoneconnector

Usedtoattachamicrophonetoyourcomputerwhenyouwanttorecordsoundorif

youusespeech-recognitionsoftware.

Serialport

Usedtoattachanexternalmodem,aserialprinter,orotherdevicesthatusea

9-pinserialport.

USBconnectorUsedtoattachadevicethatrequiresaUSBconnector,suchasaUSBkeyboard,a

USBmouse,aUSBscanner,oraUSBprinter.IfyouhavemorethaneightUSB

devices,youcanpurchaseaUSBhub,whichyoucanusetoconnectadditional

USBdevices.

VGAmonitorconnectorUsedtoattachaVGAmonitororotherdevicesthatuseaVGAmonitorconnector.

Locatingpartsonthesystemboard

Figure3“Systemboardpartlocations”onpage4showsthelocationsofthepartsonthesystemboard.

Figure3.Systemboardpartlocations

14-pinpowerconnector

11FrontUSBconnector1(forconnectingUSBportsonthe

frontbezel)

2Microprocessor

12ClearCMOS(ComplementaryMetalOxideSemiconductor)

/Recoveryjumper

3Microprocessorfanconnector

13FrontUSBconnector2(forconnectinganadditionalUSB

device)

4Memoryslot1(DIMM1)

14Battery

5Memoryslot2(DIMM2)15Serial(COM2)connector

6Thermalsensorconnector16Frontaudioconnector

4LenovoM4350UserGuide

724-pinpowerconnector

17PCIExpressx1cardslots(2)

8Powerfanconnector

18PCIExpressx16graphicscardslot

9SATAconnectors(3)19Systemfanconnector

10Frontpanelconnector(forconnectingLED

indicatorsandthepowerswitch)

Chapter1.Productoverview5

6LenovoM4350UserGuide

Chapter2.Youandyourcomputer

Thischapterprovidesinformationaboutaccessibility,comfort,andrelocatingyourcomputertoother

countriesorregions.

Accessibilityandcomfort

Goodergonomicpracticeisimportanttogetthemostfromyourpersonalcomputerandtoavoiddiscomfort.

Arrangeyourworkplaceandtheequipmentyouusetosuityourindividualneedsandthekindofwork

thatyouperform.Inaddition,usehealthyworkhabitstomaximizeyourperformanceandcomfortwhile

usingyourcomputer.

Thefollowingtopicsprovideinformationaboutarrangingyourworkarea,settingupyourcomputer

equipment,andestablishinghealthyworkhabits.

Lenovoiscommittedtoprovidingpeoplewithdisabilitiesgreateraccesstoinformationandtechnology.

Asaresult,thefollowinginformationprovideswaystohelpusersthathavehearing,vision,andmobility

limitationsgetthemostoutoftheircomputerexperience.

Assistivetechnologiesenableuserstoaccessinformationinthemostappropriateway.Someofthese

technologiesarealreadyprovidedinyouroperatingsystem,otherscanbepurchasedthroughvendors,or

accessedthroughtheWorldWideWeb:

http://www.lenovo.com/healthycomputing

Arrangingyourworkspace

Togetthemostfromyourcomputer,arrangeboththeequipmentyouuseandyourworkareatosuityour

needsandthekindofworkyoudo.Yourcomfortisofforemostimportance,butlightsources,aircirculation,

andthelocationofelectricaloutletscanalsoaffectthewayyouarrangeyourworkspace.

Comfort

Althoughnosingleworkingpositionisidealforeveryone,hereareafewguidelinestohelpyounda

positionthatsuitsyoubest.

Sittinginthesamepositionforalongtimecancausefatigue.Thebackrestandseatofyourchairshould

adjustindependentlyandprovidegoodsupport.Theseatshouldhaveacurvedfronttorelievepressureon

thethighs.Adjusttheseatsothatyourthighsareparalleltotheoorandyourfeetareeitheratonthe

oororonafootrest.

Whenusingthekeyboard,keepyourforearmsparalleltotheoorandyourwristsinacomfortableposition.

Usealighttouchonthekeyboardandyourhandsandngersrelaxed.Changetheangleofthekeyboard

formaximumcomfortbyadjustingthepositionofthekeyboardfeet.

7

Adjustthemonitorsothetopofthescreenisat,orslightlybelow,eyelevel.Placethemonitorata

comfortableviewingdistance,usually51to61cm(20to24inches),andpositionitsoyoucanviewit

withouthavingtotwistyourbody.Also,positionotherequipmentyouuseregularly,suchasthetelephoneor

amouse,withineasyreach.

Glareandlighting

Positionthemonitortominimizeglareandreectionsfromoverheadlights,windows,andotherlightsources.

Reectedlightfromshinysurfacescancauseannoyingreectionsonyourmonitorscreen.Placethe

monitoratrightanglestowindowsandotherlightsources,whenpossible.Reduceoverheadlighting,if

necessary,byturningofflightsorusinglowerwattagebulbs.Ifyouinstallthemonitornearawindow,use

curtainsorblindstoblockthesunlight.Youcanadjustthebrightnessandcontrastcontrolsonthemonitor

astheroomlightingchangesthroughouttheday.

Whereitisimpossibletoavoidreectionsortoadjustthelighting,anantiglarelterplacedoverthescreen

mightbehelpful.However,theseltersmightaffecttheclarityoftheimageonthescreen;trythemonlyafter

youhaveexhaustedothermethodsofreducingglare.

Dustbuildupcompoundsproblemsassociatedwithglare.Remembertocleanyourmonitorscreen

periodicallyusingasoftclothasdirectedinyourmonitordocumentation.

Aircirculation

Yourcomputerandmonitorproduceheat.Thecomputerhasafanthatpullsinfreshairandforcesouthot

air.Themonitorletshotairescapethroughvents.Blockingtheairventscancauseoverheating,whichmight

resultinamalfunctionordamage.Placethecomputerandmonitorsothatnothingblockstheairvents;

usually,51mm(2inches)ofairspaceissufcient.Also,makesuretheventedairisnotblowingonpeople.

Electricaloutletsandcablelengths

Thelocationofelectricaloutlets,thelengthofpowercordsandcablesthatconnecttothemonitor,printer,

andotherdevicesmightdeterminethenalplacementofyourcomputer.

Whenarrangingyourworkspace:

•Avoidtheuseofextensioncords.Whenpossible,plugthecomputerpowercorddirectlyintoanelectrical

outlet.

•Keeppowercordsandcablesneatlyroutedawayfromwalkwaysandotherareaswheretheymight

getkickedaccidentally.

Formoreinformationaboutpowercords,see“Powercordsandpoweradapters”onpageiv

.

8LenovoM4350UserGuide

Movingyourcomputertoanothercountryorregion

Whenyoumoveyourcomputertoanothercountryorregion,youmusttakelocalelectricalstandardsinto

consideration.Thissectionprovidesinformationonthefollowing:

•“Voltage-selectionswitch”onpage9

•“Replacementpowercords”onpage9

Voltage-selectionswitch

Somecomputersareequippedwithavoltage-selectionswitchlocatednearthepower-cordconnection

pointonthecomputerandsomecomputersdonothaveavoltage-selectionswitch.Beforeyouinstall

yourcomputerorrelocateyourcomputertoanothercountryorregion,youmustbecertainthatyouhave

matchedyourcomputertothevoltageavailableatyourelectricaloutlet.

CAUTION:

Youmustknowthevoltageoftheelectricalconnection(outlet)whereyourcomputerwillbe

connected.Ifyoudonotknowthevoltage,contactyourlocalelectriccompanyorrefertoofcial

Websitesorotherliteraturefortravelerstothecountryorregionwhereyouarelocated.

Ifyourcomputerhasavoltage-selectionswitch,youmustsettheswitchtomatchthevoltageavailableat

yourelectricaloutlet.Settingthevoltage-selectionswitchincorrectlywillcausethecomputertomalfunction

andmightcausepermanentdamagetothecomputer.Donotconnectthecomputertoanelectrical

outletuntilyouhaveveriedthatthevoltage-selectionswitchsettingmatchesthevoltageavailableatthe

electricaloutlets.

Ifyourcomputerdoesnothaveavoltage-selectionswitch,inspectthevoltage-ratinglabelonthebottomof

thecomputerandnotethefollowing:

•Ifthevoltage-ratinglabelshowsarangeofeither“100-127V”or“200-240V,”youmustensurethatthe

voltageprovidedattheelectricaloutletmatchesthevoltageratingonthecomputerlabel.Ifitdoes

notmatch,donotattempttoconnectthecomputertotheelectricaloutlet,unlessanexternaldevice

suchasavoltage-convertingtransformerisused.

•Ifthevoltage-ratinglabelshowsadualrangeof“100-127V”and“200-240V,”thissigniesthatthe

computerissuitableforworldwideoperationandthecomputerwillautomaticallyadjusttothevoltageat

theelectricaloutletregardlessofthecountryorregionwherethecomputerisbeingconnected.

Replacementpowercords

Ifyourelocateyourcomputertoacountryorregionthatusesanelectricaloutletstyledifferentfromthe

typeyouarecurrentlyusing,youwillhavetopurchaseeitherelectricalplugadaptersornewpowercords.

YoucanorderpowercordsdirectlyfromLenovo.

Forpowercordinformationandpartnumbers,goto:

http://www.lenovo.com/powercordnotice

Chapter2.Youandyourcomputer9

10LenovoM4350UserGuide

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Lenovo M4350 User guide

Lenovo M4350 User guide

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