Lenovo C240/245/255 All-In-One PC Hardware Maintenance Manual

Contents
Chapter1.Aboutthismanual......1
ImportantSafetyInformation..........1
Chapter2.Safetyinformation......3
Generalsafety................3
Electricalsafety...............3
Safetyinspectionguide............5
Handlingelectrostaticdischarge-sensitive
devices..................5
Groundingrequirements............6
Safetynotices................6
Chapter3.Generalinformation.....9
Specications................9
Chapter4.GeneralCheckout.....11
Chapter5.UsingtheSetupUtility...13
StartingtheLenovoBIOSSetupUtilityprogram.13
Viewingandchangingsettings........13
Usingpasswords..............13
Enablingordisablingadevice........15
Selectingastartupdevice..........16
Changingbootingmode...........17
ExitingtheLenovoBIOSSetupUtilityprogram..17
Chapter6.Symptom-to-FRUIndex..19
Harddiskdrivebooterror..........19
PowerSupplyProblems...........19
POSTerrorcodes.............20
Undeterminedproblems...........20
Chapter7.Locatingconnectors,
controlsandcomponents......21
Chapter8.Replacinghardware....27
Generalinformation.............27
Replacingthekeyboardandmouse......28
Replacingtheopticaldrive..........28
Replacingthepoweradapter.........30
Removingtherearcover...........31
Replacingamemorymodule.........32
Replacingtheharddiskdrive.........32
Replacingtheheat-sink...........33
Replacingthesystemfan..........34
ReplacingtheWi-Ficard...........35
Replacingthespeakersystem........36
Replacingthefrontindicatorboard.......37
Replacingthepowerswitchboard.......38
Replacingthemotherboard..........39
Replacingthecomputerstand........41
Replacingthecamera............41
Replacingtheconverterboard........42
ReplacingtheLEDpanel...........43
Chapter9.FRUlists-C240–245....47
Chapter10.FRUlists-C255......51
Chapter11.AdditionalService
Information..............57
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