Contents
Aboutthismanual...........iii
Chapter1.Safetyinformation.....1
Generalsafety................1
Electricalsafety...............2
Safetyinspectionguide............3
Handlingdevicesthataresensitivetoelectrostatic
discharge..................3
Groundingrequirements............4
Safetynotices(multilingualtranslations)......4
Chapter2.Importantservice
information..............19
StrategyforreplacingFRUs.........19
Strategyforreplacingaharddiskdrive...20
Importantnoticeforreplacingasystem
board................20
Howtouseerrormessage........20
StrategyforreplacingFRUsforCTO,CMV,and
GAV...................20
Productdenition............20
FRUidenticationforCTO,CMV,andGAV
products...............21
Chapter3.Generalcheckout.....23
Whattodorst..............23
Checkoutguide..............24
DiagnosticsusingPC-DoctorforDOS....24
LenovoThinkVantageToolbox.......26
FRUtests...............27
Powersystemcheckout...........28
Checkingtheacpoweradapter......28
Checkingoperationalcharging......29
Checkingthebatterypack........29
Checkingthebackupbattery.......30
Chapter4.Relatedservice
information..............31
RestoringthefactorycontentsbyusingRecovery
DiscSet.................31
Passwords................32
Power-onpassword...........32
Harddiskpassword...........32
Supervisorpassword..........33
Howtoremovethepower-onpassword...33
Howtoremovethehard-diskpassword...33
Powermanagement............34
Screenblankmode...........34
Sleep(standby)mode..........34
Hibernationmode...........35
Symptom-to-FRUindex...........35
Numericerrorcodes..........36
Errormessages............37
Beepsymptoms............37
No-beepsymptoms...........37
LCD-relatedsymptoms.........38
Intermittentproblems..........38
Undeterminedproblems.........39
Chapter5.Statusindicators.....41
Chapter6.Fnkeycombinations...43
Chapter7.FRUreplacement
notices................45
Screwnotices...............45
Retainingserialnumbers...........46
Restoringtheserialnumberofthesystem
unit.................46
RetainingtheUUID...........47
ReadingorwritingtheECAinformation...47
Chapter8.Removingandreplacinga
FRU..................49
BeforeservicingThinkPadX121emodels....49
1010Batterypack.............50
1020Bottomslotcover...........51
1030Memorymodules...........52
1040Harddiskdriveorsolidstatedrive
assembly.................53
1050PCIExpressMiniCardforwirelessLAN..54
1060PCIExpressMiniCardforwirelessWAN..56
1070Keyboard..............57
1080Powersubcardandmicrophone.....59
1090Topcaseassembly...........60
1100Bluetoothdaughtercard........62
1110Speakerassembly...........63
1120I/Oboard..............64
1130Systemboardassembly,fanassembly,and
backupbattery..............65
1140CRTboardassembly(withcable).....67
1150DC-insubcardandbasecoverassembly..68
2010LCDunit...............71
2020LCDbezelassembly..........73
2030Integratedcamera...........74
2040LCDpanel,LCDcable,andhinges....75
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