–Thecableisinstalledproperly.
ThenetworkcablemustbesecurelyconnectedbothtotheEthernetconnectorofyourcomputerand
totheRJ45connectorofthehub.Themaximumallowabledistancefromthecomputertohubis
100meters.Ifthecableisconnectedandthedistanceiswithinacceptablelimitsbuttheproblem
persists,tryadifferentcable.
–Youareusingthecorrectdevicedriver.
1.ClickStart,andthenclickControlPanel.
2.ClickHardwareandSound.
3.ClickDeviceManager.Ifyouarepromptedforanadministratorpasswordorconrmation,type
thepasswordorprovideconrmation.
4.Ifthe!markistotheleftoftheadapternameunderNetworkadapters,youmightnotusethe
correctdriverorthedriverisnotenabled.Toupdatethedriver,right-clickthehighlight edadapter.
5.ClickUpdateDriverSoftware,andthenfollowtheinstructionsonthescreen.
–Theswitchportandtheadapterhavethesameduplexsetting.
Ifyouconguredtheadapterforfullduplex,makesuretheswitchportisalsoconguredforfull
duplex.Settingthewrongduplexmodecandegradeperformance,causedataloss,orresultinlost
connections.
–Youhaveinstalledallnetworkingsoftwarethatisnecessaryforyournetworkenvironment.
CheckwithyourLANadministratorforthenecessarynetworkingsoftware.
•Problem:Theadapterstopsworkingfornoapparentreason.
Solution:Thenetworkdriverlesmaybecorruptormissing.Updatethedriverbyfollowingthe
procedureslistedabovetomakesurethatthecorrectdevicedriverisinstalledintheprecedingproblem.
•Problem:IfyourcomputerisaGigabitEthernetmodelandyouusetheaspeedof1000Mbps,the
connectionfailsorerrorsoccur.
Solution:
–UseCategory5wiringandmakesurethatthenetworkcableissecurelyconnected.
–Connecttoa1000BASE-Thub/switch(not1000BASE-X).
•Problem:TheWakeonLAN(WOL)featureisnotworking.
Solution:
–MakesurethatWOLisenabledintheThinkPadSetup.
–Ifitis,checkwithyourLANadministratorforthenecessarysettings.
•Problem:IfyourcomputerisaGigabitEthernetmodel,itcannotconnecttothenetworkat1000Mbps.
Instead,itconnectsat100Mbps.
Solution:
–Tryanothercable.
–Makesurethatthelinkpartnerissettoauto-negotiate.
–Makesurethattheswitchis802.3ab-compliant(gigabitovercopper).
AwirelessLANproblem
•Problem:Youcannotconnectusingthebuilt-inwirelessnetworkingcard.
Solution:MakesurethatyourwirelessLANdriveristhelatestversioninstalled.ChecktheWebsiteand
conrmthedriverversionsupportedbyAccessConnectionsisthelatestdocumentedintheREADMEle.
Makesurethatyourcomputeriswithinrangeofawirelessaccesspoint.
Chapter10.Troubleshootingcomputerproblems129