Lenovo E520 User's Guide Page 157
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- Table of contents
- TROUBLESHOOTING
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•Problem:Theadapterstopsworkingfornoapparentreason.
Solution:Thenetworkdriverlesmaybecorruptormissing.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
conrmthedriverversionsupportedbyAccessConnectionsisthelatestdocumentedintheREADMEle.
Makesurethatyourcomputeriswithinrangeofawirelessaccesspoint.
Makesurethatthewirelessradioisenabledbydouble-clickingtheAccessConnectionsiconinthe
taskbar.
Note:IfyourcomputerisaWindows7model,todisplaytheAccessConnectionsstatusiconandthe
wirelessstatusiconinthesystemtray,refertotheAccessConnectionson-linehelp.
CheckNetworkName(SSID),andyourencryptioninformation.UseAccessConnectionstoverifythis
case-sensitiveinformation.
Note:AccessConnectionsdoesnotsupportconnectiontowirelessWANnetworkinChina.
AwirelessWANproblem
•Message:UnauthorizedWANcardispluggedin-PoweroffandremovetheWANcard.
Solution:TheWANcardisnotsupportedonthiscomputer.Removeit.
Note:Dependingonyourcomputer,somemodelsdonothaveawirelessWAN.
Bluetoothproblems
ForWindows7:
•Problem:SounddoesnotcomefromtheBluetoothheadset/headphonebutcomesfromthelocal
speakereventhoughtheheadset/headphoneisconnectedusingHeadsetproleorAVprole.
Solution:Dothefollowing:
1.Exittheapplicationthatusesthesounddevice(forexample,WindowsMediaPlayer).
2.OpentheControlPanelbyclickingStart➙ControlPanel.
3.ClickHardwareandSound➙Sound.
4.SelectthePlaybacktab.
Chapter10.Troubleshootingcomputerproblems139
- UserGuide 1
- Contents 3
- AppendixA.Regulatory 5
- AppendixB.WEEEandrecycling 5
- AppendixC.Notices........173 5
- Readthisrst 7
- Importantsafetyinformation 8
- Safetyguidelines 9
- Powercordsandpoweradapters 11
- Plugsandoutlets 12
- Powersupplystatement 12
- Externaldevices 12
- Batteries 13
- Rechargeablebatterynotice 13
- Lithiumcoincellbatterynotice 14
- Heatandproductventilation 15
- Lasercompliancestatement 16
- Usingheadphonesorearphones 17
- Additionalsafetyinformation 17
- Chapter1.ProductOverview 19
- Frontview 20
- ThinkPadEdgeE520frontview 22
- Right-sideview 24
- Left-sideview 25
- Bottomview 27
- Rearview 28
- Statusindicators 29
- System-statusindicators 30
- Power-statusindicators 31
- On-screenindicators 31
- Machinetypeandmodellabel 32
- CerticateofAuthenticitylabel 33
- Features 33
- ThinkPadEdgeE420features 33
- ThinkPadEdgeE520features 35
- Specications 36
- ThinkPadEdgeE420specications 36
- ThinkPadEdgeE520specications 36
- Operatingenvironment 37
- AccessConnections 39
- ActiveProtectionSystem 39
- FingerprintSoftware 40
- LenovoThinkVantageTools 40
- LenovoThinkVantageToolbox 40
- MessageCenterPlus 40
- PasswordManager 41
- PowerManager 41
- ProductRecovery 41
- RescueandRecovery 41
- SystemUpdate 41
- ThinkVantageGPS 42
- Chapter2.Usingyourcomputer 43
- Specialkeysandbuttons 44
- ThinkPadEdgeE420specialkeys 45
- ThinkpadEdgeE520specialkeys 46
- Chapter2.Usingyourcomputer29 47
- Usingthetouchpad 51
- Powermanagement 53
- Checkingbatterystatus 53
- Usingtheacpoweradapter 53
- Chargingthebattery 54
- Maximizingbatterylife 54
- Managingyourbatterypower 54
- Power-savingmodes 55
- Handlingthebattery 56
- Chapter2.Usingyourcomputer39 57
- Connectingtothenetwork 58
- Ethernetconnections 58
- Wirelessconnections 58
- MakingwirelessLANconnections 59
- UsingwirelessWANconnections 59
- UsingBluetooth 60
- Chapter2.Usingyourcomputer43 61
- UsingWiMAX 63
- Changingdisplaysettings 65
- Attachinganexternalmonitor 66
- Chapter2.Usingyourcomputer49 67
- Usingdualdisplays 68
- Usingaudiofeatures 69
- Usinganintegratedcamera 70
- Usingopticaldrive 70
- Insertingacard 71
- Removingthecard 72
- Chapter3.Youandyourcomputer 73
- Adjustingyourcomputertotyou 74
- Accessibilityinformation 75
- Travelingwithyourcomputer 75
- Traveltips 75
- Travelaccessories 76
- Chapter4.Security 77
- Typingpasswords 78
- Power-onpassword 78
- Harddiskpasswords 79
- Supervisorpassword 81
- Harddisksecurity 82
- Usingangerprintreader 83
- Usingandunderstandingrewalls 85
- Protectingdataagainstviruses 85
- 68UserGuide 86
- Chapter5.Recoveryoverview 87
- Creatingrecoverymedia 88
- Usingrecoverymedia 88
- Performingabackupoperation 89
- Performingarecoveryoperation 89
- Creatingandusingarescuemedium 91
- Creatingarescuemedium 91
- Usingarescuemedium 91
- Solvingrecoveryproblems 93
- 76UserGuide 94
- Chapter6.Replacingdevices 95
- 1,andremovethebattery2 96
- Replacingtheharddiskdrive 97
- 80UserGuide 98
- .Replacingdevices81 99
- Replacingtheopticaldrive 100
- ThinkPadEdgeE420 100
- 5.Loosenthescrew 101
- 6.Pulloutthedrive 101
- .Replacingdevices83 101
- 2.Reinstallthescrew 102
- 4.Putthebatteryinplace 102
- 84UserGuide 102
- ThinkPadEdgeE520 103
- 1,andtightenit2 104
- 1,andthenremovethecover2 105
- Chapter6.Replacingdevices87 105
- 88UserGuide 106
- .Replacingdevices89 107
- .Replacingdevices91 109
- 92UserGuide 110
- Replacingmemory 111
- Replacingthekeyboard 113
- 5.Removethescrews1and2 114
- 96UserGuide 114
- Chapter6.Replacingdevices97 115
- 4.Reinstallthescrews1and2 116
- 98UserGuide 116
- 100UserGuide 118
- Chapter6.Replacingdevices101 119
- 102UserGuide 120
- ReplacingtheSIMcard 121
- FindingThinkPadoptions 123
- 106UserGuide 124
- Chapter8.Advancedconguration 125
- InstallingWindows7 126
- InstallingWindowsXP 127
- Installingdevicedrivers 129
- Installingdriversandsoftware 130
- ThinkPadSetup 131
- Congmenu 132
- Dateandtimemenu 132
- Securitymenu 132
- Startupmenu 133
- Restartmenu 134
- ThinkPadSetupitems 135
- 118UserGuide 136
- .Advancedconguration119 137
- Securitymenuitems 138
- 120UserGuide 138
- .Advancedconguration121 139
- Startupmenuitems 140
- 122UserGuide 140
- UpdatingyoursystemUEFIBIOS 141
- 124UserGuide 142
- Chapter9.Preventingproblems 143
- Takingcareofyourcomputer 145
- 130UserGuide 148
- Diagnosingprograms 149
- Troubleshooting 149
- Computerstopsresponding 150
- Spillsonthekeyboard 150
- Errormessages 151
- Errorswithoutmessages 154
- Beeperrors 155
- Memoryproblems 155
- Networking 156
- AwirelessLANproblem 157
- AwirelessWANproblem 157
- Bluetoothproblems 157
- UltraNavproblems 160
- Displayandmultimediadevices 161
- Externalmonitorproblems 163
- Audioproblems 166
- Fingerprintreaderproblems 168
- Batteryandpower 169
- Powerproblems 170
- Apowerbuttonproblem 170
- Startupproblems 170
- Drivesandotherstoragedevices 172
- Softwareproblems 173
- Portsandconnectors 174
- Chapter11.Gettingsupport 175
- Gettinghelpandservice 176
- Usingdiagnosticprograms 176
- LenovosupportWebsite 176
- CallingLenovo 176
- Chapter11.Gettingsupport159 177
- 160UserGuide 178
- .Gettingsupport161 179
- 162UserGuide 180
- Purchasingadditionalservices 181
- 164UserGuide 182
- Wirelessrelatedinformation 183
- 3WirelessWANantenna(Main) 185
- 2WirelessLANantenna(Main) 185
- Exportclassicationnotice 186
- Electronicemissionnotices 186
- Directive 187
- EUWEEEstatements 189
- Japanrecyclingstatements 189
- AppendixC.Notices 191
- Trademarks 192
- PartNumber: 194
- PrintedinChina 194
- (1P)P/N: 194
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