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•ThewirelessKeyboardislocatedlessthantenmetersawayfromthetransceiver.
•Thetransceiverisfullyinstalled.
Action:IftheTransceiverCommunicationsLEDisnoton,reconnectthetransceiverandthekeyboard.
Monitorproblems
Note:Manymonitorshavestatus-indicatorlightsandbuilt-incontrolsforadjustingbrightness,contrast,
width,height,andotherpictureadjustments.However,thecontrolsvaryfrommonitortypetomonitortype.
Forinformationaboutthestatuslightsandusingthecontrols,refertothedocumentationthatcomes
withyourmonitor.
Selectyoursymptomfromthefollowinglist:
•“Wrongcharactersappearonthescreen”onpage111
•“Themonitorworkswhenyouturnonthecomputer,butgoesblankaftersomeperiodofcomputer
inactivity”onpage111
•“Themonitorworkswhenyouturnonthecomputer,butgoesblankwhenyoustartsomeapplication
programs”onpage111
•“Theimageappearstobeflickering”onpage112
•“Theimageisdiscolored”onpage112
Wrongcharactersappearonthescreen
Symptom:Wrongcharactersappearonthescreen.
Action:Havethecomputerserviced.Fordetails,seeChapter11“Gettinginformation,help,andservice”on
page121.
Themonitorworkswhenyouturnonthecomputer,butgoesblankaftersomeperiod
ofcomputerinactivity
Symptom:Themonitorworkswhenyouturnonthecomputer,butgoesblankaftersomeperiodofcomputer
inactivity.
Action:Thecomputerisprobablysetforenergysavingswiththepower-managementfeature.Ifthe
power-managementfeatureisenabled,disablingitorchangingthesettingsmightsolvetheproblem.
Iftheseactionsdonotcorrecttheproblem,runtheLenovoSolutionCenterprogram.Ifyouneedtechnical
assistance,seeChapter11“Gettinginformation,help,andservice”onpage121
.
Themonitorworkswhenyouturnonthecomputer,butgoesblankwhenyoustart
someapplicationprograms
Symptom:Themonitorworkswhenyouturnonthecomputer,butgoesblankwhenyoustartsome
applicationprograms.
Actions:
•Makesurethemonitorsignalcableissecurelyconnectedtothemonitorandthemonitorconnectoron
thecomputer.Aloosecablecancauseintermittentproblems.
•Verifythatthenecessarydevicedriversfortheapplicationprogramsareinstalled.Refertothe
documentationfortheaffectedapplicationprogramtoseeifdevicedriversarerequired.
Iftheseactionsdonotcorrecttheproblem,runtheLenovoSolutionCenterprogram.Ifyouneedtechnical
assistance,seeChapter11“Gettinginformation,help,andservice”onpage121
.
Chapter10.Troubleshootinganddiagnostics111
- ThinkCentreM73 1
- UserGuide 1
- ThirdEdition(June2014) 2
- Contents 3
- Importantsafetyinformation 7
- Powercordsandpoweradapters 8
- Plugsandoutlets 9
- Externaldevices 9
- Heatandproductventilation 9
- Operatingenvironment 10
- Lasercompliancestatement 10
- Powersupplystatement 11
- Cleaningandmaintenance 11
- Chapter1.Productoverview 13
- Chapter1.Productoverview3 15
- Specifications 17
- Lenovoprograms 17
- Chapter1.Productoverview7 19
- Locations 21
- 10ThinkCentreM73UserGuide 22
- .Productoverview11 23
- Locatingcomponents 24
- Locatingpartsonthesystemboard 25
- Locatinginternaldrives 26
- Machinetypeandmodellabel 27
- 16ThinkCentreM73UserGuide 28
- Chapter2.Usingyourcomputer 29
- NavigatingonWindows8 30
- NavigatingonWindows8.1 31
- Usingthekeyboard 33
- UsingWindowsshortcutkeys 33
- Usingafingerprintreader 33
- Usingthewheelmouse 34
- Adjustingaudio 34
- Aboutyourcomputeraudio 34
- UsingCDsandDVDs 35
- PlayingaCDorDVD 36
- RecordingaCDorDVD 36
- Chapter2.Usingyourcomputer25 37
- 26ThinkCentreM73UserGuide 38
- Chapter3.Youandyourcomputer 39
- Glareandlighting 40
- Aircirculation 40
- Accessibilityinformation 40
- Chapter3.Youandyourcomputer29 41
- Chapter3.Youandyourcomputer31 43
- Registeringyourcomputer 44
- Chapter4.Security 45
- Lockingthecomputercover 46
- BIOSpasswords 47
- Windowspasswords 48
- Configuringthefingerprintreader 48
- Usingandunderstandingfirewalls 48
- Protectingdataagainstviruses 48
- .Security37 49
- 38ThinkCentreM73UserGuide 50
- Installingorreplacinghardware 51
- Installingexternaloptions 51
- Removingthecomputercover 52
- Attention: 54
- 44ThinkCentreM73UserGuide 56
- 1asshownto 58
- Replacingthebattery 59
- Replacingtheharddiskdrive 60
- Replacingthesolid-statedrive 62
- 56ThinkCentreM73UserGuide 68
- Replacingthemicroprocessor 77
- Replacingthesystemfanassembly 80
- ReplacingtheWiFiunits 82
- RemovingtheWiFiadaptercard 83
- RemovingtheWiFicardmodule 84
- InstallingtheWiFiunits 85
- 74ThinkCentreM73UserGuide 86
- InstallingtherearWiFiantenna 87
- RemovingtherearWiFiantenna 88
- InstallingthefrontWiFiantenna 89
- RemovingthefrontWiFiantenna 90
- Replacingthekeyboard 91
- Replacingthemouse 92
- Completingthepartsreplacement 93
- Obtainingdevicedrivers 94
- Chapter6.Recoveryinformation 95
- Creatingrecoverymedia 96
- Usingrecoverymedia 96
- Performingabackupoperation 96
- Performingarecoveryoperation 97
- Creatingandusingarescuemedium 98
- Reinstallingsoftwareprograms 100
- Reinstallingdevicedrivers 100
- Solvingrecoveryproblems 100
- Refreshingyourcomputer 101
- ThinkCentreM73UserGuide 102
- Viewingandchangingsettings 103
- Usingpasswords 103
- Passwordconsiderations 104
- Power-OnPassword 104
- AdministratorPassword 104
- HardDiskPassword 104
- Enablingordisablingadevice 105
- Selectingastartupdevice 106
- EnablingErPLPScompliancemode 106
- ICEperformancemode 107
- ICEthermalalert 107
- Usingsystemprograms 109
- Chapter9.Preventingproblems 111
- UsingSystemUpdate 112
- Cleaningyourcomputer 113
- Goodmaintenancepractices 114
- Movingyourcomputer 114
- Basictroubleshooting 115
- Troubleshootingprocedure 116
- Troubleshooting 116
- Audioproblems 117
- CDproblems 118
- DVDproblems 119
- DVDmoviewillnotplay 120
- Playbackisverysloworchoppy 120
- Intermittentproblems 121
- Monitorproblems 123
- Networkingproblems 124
- Ethernetproblems 125
- AwirelessLANproblem 126
- Optionproblems 127
- Performanceandlockupproblems 128
- Printerproblems 130
- Serialportproblems 130
- Softwareproblems 131
- USBproblems 132
- LenovoSolutionCenter 132
- Informationresources 133
- LenovoThinkVantageT ools 133
- HelpandSupport 133
- SafetyandWarranty 133
- LenovoWebsite 133
- LenovoSupportWebsite 134
- Helpandservice 134
- Callingforservice 134
- Usingotherservices 135
- Purchasingadditionalservices 135
- 124ThinkCentreM73UserGuide 136
- AppendixA.Notices 137
- Trademarks 138
- Exportclassificationnotice 139
- Televisionoutputnotice 139
- Electronicemissionsnotices 139
- Eurasiancompliancemark 141
- Brazilregulatorynotice 141
- Mexicoregulatorynotice 141
- ImportantWEEEinformation 143
- RecyclinginformationforJapan 143
- RecyclinginformationforBrazil 144
- 134ThinkCentreM73UserGuide 146
- EuropeanUnionRoHS 147
- ChinaRoHS 147
- TurkishRoHS 147
- UkraineRoHS 148
- IndiaRoHS 148
- AppendixE.ChinaEnergyLabel 149
- 138ThinkCentreM73UserGuide 150
- ©CopyrightLenovo2013,2014 151
- 140ThinkCentreM73UserGuide 152
- 142ThinkCentreM73UserGuide 154
- 144ThinkCentreM73UserGuide 156
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