Lenovo ThinkPad Edge E420 - A Wireless Lan Problem

2.ClickHardwareandSound.
3.ClickDeviceManager.Ifyouarepromptedforanadministratorpasswordorconrmation,type
thepasswordorprovideconrmation.
4.Ifthe!markistotheleftoftheadapternameunderNetworkadapters,youmightnotusethe
correctdriverorthedriverisnotenabled.Toupdatethedriver,right-clickthehighlightedadapter.
5.ClickUpdateDriverSoftware,andthenfollowtheinstructionsonthescreen.
ForWindowsXP:
1.ClickStart,andthenclickControlPanel.
2.ClickPerformanceandMaintenance,andthenclickSystem.
3.ClicktheHardwaretab,andclicktheDeviceManagerbutton.
4.IfthexmarkistotheleftoftheadapternameunderNetworkadapter,youmightnotusethe
correctdriverorthedriverisnotenabled.Toupdatethedriver,right-clickthehighlightedadapter.
5.ClickProperties.ThePropertieswindowappears.
6.ClicktheDrivertab.
7.ClicktheUpdateDriverbutton.TheUpdateDeviceDriverwizardappears.Followtheinstructions
onthescreen.
–Theswitchportandtheadapterhavethesameduplexsetting.
Ifyouconguredtheadapterforfullduplex,makesuretheswitchportisalsoconguredforfull
duplex.Settingthewrongduplexmodecandegradeperformance,causedataloss,orresultinlost
connections.
–Youhaveinstalledallnetworkingsoftwarethatisnecessaryforyournetworkenvironment.
CheckwithyourLANadministratorforthenecessarynetworkingsoftware.
•Problem:Theadapterstopsworkingfornoapparentreason.
Solution:Thenetworkdriverlesmaybecorruptormissing.Updatethedriverbyreferringtothe
“Solution”descriptionfortheproceduretomakesurethatthecorrectdevicedriverisinstalledinthe
precedingproblem.
•Problem:IfyourcomputerisaGigabitEthernetmodelandyouusetheaspeedof1000Mbps,the
connectionfailsorerrorsoccur.
Solution:
–UseCategory5wiringandmakesurethatthenetworkcableissecurelyconnected.
–Connecttoa1000BASE-Thub/switch(not1000BASE-X).
•Problem:Yourcomputercannotconnecttothenetworkat1000Mbps.Instead,itconnectsat100Mbps.
Solution:
–Tryanothercable.
–Makesurethatthelinkpartnerissettoauto-negotiate.
–Makesurethattheswitchis802.3ab-compliant(gigabitovercopper).
AwirelessLANproblem
•Problem:Youcannotconnectusingthebuilt-inwirelessnetworkingcard.
Solution:MakesurethatyourwirelessLANdriveristhelatestversioninstalled.ChecktheWebsiteand
conrmthedriverversionsupportedbyAccessConnectionsisthelatestdocumentedintheREADMEle.
Makesurethatyourcomputeriswithinrangeofawirelessaccesspoint.
Makesurethatthewirelessradioisenabledbydouble-clickingtheAccessConnectionsiconinthe
taskbar.
Chapter10.Troubleshootingcomputerproblems139