Lenovo E545 Guide de l'utilisateur Page 134

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Memorymoduleproblems
Printtheseinstructionsnowandkeepitwithyourcomputerforreferencelater.
Ifyourmemorymoduleisnotoperatingproperly,checkthefollowingitems:
1.Verifythatthememorymoduleisinstalledandseatedcorrectlyinyourcomputer.
Itmightbenecessarytoremovealladdedmemorymodulestotestthecomputerwithonlythe
factory-installedmemorymodules,andthenreinstallthememorymoduleoneatatimetoensure
aproperconnection.
2.Checkforerrormessagesduringstartup.
Followtheappropriatecorrectiveactionsforpower-onself-test(POST)errormessages.
3.VerifythatthelatestUEFIBIOSforyourmodelhasbeeninstalled.
4.Verifythepropermemorycongurationandcompatibilityincludingthemaximummemorysizeandthe
memoryspeed.
5.Rundiagnosticprograms.See“Diagnosingproblems”onpage113.
Networkingproblems
Thefollowingarethemostcommonnetworkingproblems:
Ethernetproblems
Problem:Yourcomputercannotconnecttothenetwork.
Solution:Makesurethat:
Thecableisinstalledcorrectly.
ThenetworkcablemustbesecurelyconnectedbothtotheEthernetconnectorofyourcomputerand
totheRJ45connectorofthehub.Themaximumallowabledistancefromthecomputertohubis
100meters.Ifthecableisconnectedandthedistanceiswithinacceptablelimitsbuttheproblem
persists,tryadifferentcable.
Youareusingthecorrectdevicedriver.
1.GotoControlPanelandclickHardwareandSoundDeviceManager.Ifyouarepromptedfor
anadministratorpasswordorconrmation,typethepasswordorprovideconrmation.
2.Iftheexclamationmark!isdisplayednexttotheadapternameunderNetworkadapters,you
mightnotbeusingthecorrectdriverorthedrivermighthavebeendisabled.Toupdatethedriver,
right-clickthehighlightedadapter.
3.ClickUpdateDriverSoftware,andthenfollowtheinstructionsonthescreen.
Theswitchportandtheadapterhavethesameduplexsetting.
Ifyouconguredtheadapterforfullduplex,makesurethattheswitchportalsoisconguredfor
fullduplex.Settingthewrongduplexmodecandegradeperformance,causedataloss,orresultin
lostconnections.
Youhaveinstalledallnetworkingsoftwarethatisnecessaryforyournetworkenvironment.
CheckwithyourLANadministratorforthenecessarynetworkingsoftware.
Problem:Theadapterstopsworkingfornoapparentreason.
Solution:Thenetworkdriverlesmightbecorruptormissing.Updatethedriverbyreferringtotheabove
solutionfortheproceduretomakesurethatthecorrectdevicedriverisinstalled.
Problem:IfyourcomputerisaGigabitEthernetmodelandyouuseaspeedof1000Mbps,the
connectionfailsorerrorsoccur.
118UserGuide
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