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systems,networks,andmodemsbeforeyouopenthecomputercovers,unlessinstructedotherwise
intheinstallationandconfigurationprocedures.
Observethefollowingruleswhenworkingonelectricalequipment.
Important:Useonlyapprovedtoolsandtestequipment.Somehandtoolshavehandlescoveredwithasoft
materialthatdoesnotinsulateyouwhenworkingwithliveelectricalcurrents.Manycustomershave,near
theirequipment,rubberfloormatsthatcontainsmallconductivefiberstodecreaseelectrostaticdischarges.
Donotusethistypeofmattoprotectyourselffromelectricalshock.
•Findtheroomemergencypower-off(EPO)switch,disconnectingswitch,orelectricaloutlet.Ifanelectrical
accidentoccurs,youcanthenoperatetheswitchorunplugthepowercordquickly.
•Donotworkaloneunderhazardousconditionsornearequipmentthathashazardousvoltages.
•Disconnectallpowerbefore:
–Performingamechanicalinspection
–Workingnearpowersupplies
–RemovingorinstallingFieldReplaceableUnits(FRUs)
•Beforeyoustarttoworkonthemachine,unplugthepowercord.Ifyoucannotunplugit,askthecustomer
topower-offthewallboxthatsuppliespowertothemachineandtolockthewallboxintheoffposition.
•Ifyouneedtoworkonamachinethathasexposedelectricalcircuits,observethefollowingprecautions:
–Ensurethatanotherperson,familiarwiththepower-offcontrols,isnearyou.
Remember:Anotherpersonmustbetheretoswitchoffthepower,ifnecessary.
–Useonlyonehandwhenworkingwithpowered-onelectricalequipment;keeptheotherhandinyour
pocketorbehindyourback.
Remember:Theremustbeacompletecircuittocauseelectricalshock.Byobservingtheaboverule,
youmaypreventacurrentfrompassingthroughyourbody.
–Whenusingatester,setthecontrolscorrectlyandusetheapprovedprobeleadsandaccessoriesfor
thattester.
–Standonsuitablerubbermats(obtainedlocally,ifnecessary)toinsulateyoufromgroundssuchas
metalfloorstripsandmachineframes.
Observethespecialsafetyprecautionswhenyouworkwithveryhighvoltages;theseinstructionsarein
thesafetysectionsofmaintenanceinformation.Useextremecarewhenmeasuringhighvoltages.
•Regularlyinspectandmaintainyourelectricalhandtoolsforsafeoperationalcondition.
•Donotusewornorbrokentoolsandtesters.
•Neverassumethatpowerhasbeendisconnectedfromacircuit.First,checkthatithasbeenpowered-off.
•Alwayslookcarefullyforpossiblehazardsinyourworkarea.Examplesofthesehazardsaremoistfloors,
nongroundedpowerextensioncables,powersurges,andmissingsafetygrounds.
•Donottouchliveelectricalcircuitswiththereflectivesurfaceofaplasticdentalmirror.Thesurfaceis
conductive;suchtouchingcancausepersonalinjuryandmachinedamage.
•Donotservicethefollowingpartswiththepoweronwhentheyareremovedfromtheirnormaloperating
placesinamachine:
–Powersupplyunits
–Pumps
–Blowersandfans
–Motorgenerators
andsimilarunits.(Thispracticeensurescorrectgroundingoftheunits.)
•Ifanelectricalaccidentoccurs:
4ThinkCentreE93zHardwareMaintenanceManual
- ThinkCentreE93z 1
- HardwareMaintenanceManual 1
- ThirdEdition(January2014) 2
- GS-35F-05925 2
- Contents 3
- Chapter10.Additionalservice 4
- AppendixA.Notices.........133 4
- Index.................135 4
- Chapter1.Aboutthismanual 5
- Chapter2.Safetyinformation 7
- Safetyinspectionguide 9
- Groundingrequirements 10
- Chapter2.Safetyinformation7 11
- .Safetyinformation9 13
- Chapter2.Safetyinformation11 15
- .Safetyinformation13 17
- .Safetyinformation15 19
- Chapter2.Safetyinformation17 21
- ≥18kg≥32kg≥55kg 23
- .Safetyinformation21 25
- Chapter2.Safetyinformation25 29
- Chapter3.Generalinformation 33
- Specifications 34
- Lenovoprograms 34
- Chapter3.Generalinformation31 35
- LenovoSupportWebsite 36
- Chapter4.Generalcheckout 37
- Basictroubleshooting 39
- Troubleshootingprocedure 40
- Troubleshooting 41
- Audioproblems 41
- NoaudioinWindows 42
- CDproblems 43
- DVDproblems 44
- Intermittentproblems 45
- Harddiskdriveproblems 45
- Monitorproblems 48
- Networkingproblems 50
- Optionproblems 52
- Performanceandlockupproblems 53
- Printerproblems 55
- Serialportproblems 55
- Softwareproblems 56
- USBproblems 57
- Diagnostics 57
- LenovoSolutionCenter 58
- Viewingandchangingsettings 59
- Usingpasswords 59
- Passwordconsiderations 60
- Power-onpassword 60
- Administratorpassword 60
- Enablingordisablingadevice 61
- Selectingastartupdevice 61
- EnablingErPcompliancemode 62
- ExitingtheSetupUtilityprogram 63
- Chapter7.Symptom-to-FRUIndex 65
- POSTerrorcodes 66
- Miscellaneouserrorconditions 67
- Undeterminedproblems 69
- Chapter8.Locations 71
- .Locations69 73
- LocatingmajorFRUsandCRUs 74
- .Locations71 75
- LookingupFRUinformation 76
- Locatingpartsonthesystemboard 77
- Chapter9.ReplacingFRUs 79
- Figure5.Removingtheframestand 80
- Chapter9.ReplacingFRUs77 81
- Chapter9.ReplacingFRUs79 83
- Removingthecomputercover 84
- Replacingthefeet 85
- Replacingtheharddiskdrive 86
- Chapter9.ReplacingFRUs83 87
- Replacingtheopticaldrive 88
- Chapter9.ReplacingFRUs85 89
- .ReplacingFRUs87 91
- .ReplacingFRUs89 93
- ReplacingtherearI/Oassembly 94
- .ReplacingFRUs91 95
- 1andthepowercable2.Alignthe 96
- 3tosecuretheearthwire 96
- Chapter9.ReplacingFRUs93 97
- .ReplacingFRUs95 99
- Replacingthemicroprocessorfan 101
- Replacingtheheatsinkassembly 103
- Replacingthemicroprocessor 104
- Chapter9.ReplacingFRUs101 105
- 4ofthemicroprocessorsocket 106
- Replacingthecardreader 107
- ReplacingtheGPUfan 108
- .ReplacingFRUs105 109
- Replacingthebattery 110
- Replacingtheconverterboard 111
- Attention: 113
- Replacingtheinternalspeakers 114
- Chapter9.ReplacingFRUs111 115
- Replacingtheintegratedcamera 116
- .ReplacingFRUs113 117
- Replacingthesystemboard 118
- Chapter9.ReplacingFRUs115 119
- ReplacingtheLCDpanelassembly 121
- Chapter9.ReplacingFRUs119 123
- ReplacingtheWi-Ficard 125
- Figure66.RemovingtheWi-Ficard 126
- Replacingthekeyboardormouse 127
- Replacingthewirelesskeyboard 128
- Replacingthewirelessmouse 128
- Chapter9.ReplacingFRUs125 129
- Completingthepartsreplacement 130
- Chapter9.ReplacingFRUs127 131
- ©CopyrightLenovo2013,2014 133
- Powermanagement 136
- AutomaticPower-onfeatures 136
- AppendixA.Notices 137
- Televisionoutputnotice 138
- EuropeanconformanceCEmark 138
- Trademarks 138
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