Operation Manual

ManualsBrandsLenovo ManualsNotebookThinkPad E550c

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Solution:

–UseCategory5wiringandmakesurethatthenetworkcableissecurelyconnected.

–Connecttoa1000BASE-Thub/switch(not1000BASE-X).

•Problem:TheWakeOnLANfeatureisnotworking.

Solution:EnsurethatWakeOnLANisenabledinThinkPadSetup.Ifitis,checkwithyourLAN

administratorforthenecessarysettings.

•Problem:MycomputerisaGigabitEthernetmodel,itcannotconnecttothenetworkat1000Mbps.

Instead,itconnectsat100Mbps.

Solution:

–Tryanothercable.

–Makesurethatthelinkpartnerissettoauto-negotiate.

–Makesurethattheswitchis802.3ab-compliant(gigabitovercopper).

AwirelessLANproblem

Problem:Icannotconnecttothenetworkusingthebuilt-inwirelessnetworkcard.

Solution:Makesurethat:

•Theairplanemodeisoff.

•YourwirelessLANdriveristhelatestversion.

•Yourcomputeriswithinrangeofawirelessaccesspoint.

•Thewirelessradioisenabled.

Note:IfyouareusingtheWindows7operatingsystem,clickShowhiddeniconsontheWindows

notiﬁcationarea.TheAccessConnectionsiconisdisplayed.Formoreinformationabouttheicon,referto

theAccessConnectionshelpinformationsystem.

FortheWindows7operatingsystem,checktheNetworkName(SSID)andyourencryptioninformation.Use

theAccessConnectionsprogramtoverifythiscase-sensitiveinformation.

Bluetoothproblems

Note:CheckyourconnectionanytimeandmakesurethatnootherBluetooth-enableddeviceissearchingfor

thedevicetowhichyouwanttoconnect.SimultaneoussearchingisnotallowedintheBluetoothconnection.

•Problem:SounddoesnotcomefromtheBluetoothheadset/headphonebutcomesfromthelocal

speakereventhoughtheBluetoothheadset/headphoneisconnectedusingaHeadsetproﬁleorAVproﬁle.

Solution:Dothefollowing:

1.Exittheapplicationthatusesthesounddevice(forexample,WindowsMediaPlayer).

2.GotoControlPanelandclickHardwareandSound➙Sound➙Playback.

3.IfyouareusingaHeadsetproﬁle,selectBluetoothHands-freeAudioandclicktheSetDefault

button.IfyouareusinganAVproﬁle,selectStereoAudioandclicktheSetDefaultbutton.

4.ClickOKtoclosetheSoundwindow.

•Problem:PIMitemssentfromtheWindows7operatingsystemscannotbereceivedcorrectlyintothe

addressbookofanyotherBluetooth-enableddevice.

Chapter8.Troubleshootingcomputerproblems89