Contents
Aboutthismanual...........iii
Chapter1.Safetyinformation......1
Generalsafety................1
Electricalsafety...............1
Safetyinspectionguide............2
Handlingdevicesthataresensitivetoelectrostatic
discharge..................3
Groundingrequirements............4
Safetynotices(multilingualtranslations)......4
Chapter2.Importantservice
information..............19
StrategyforreplacingFRUs.........19
Strategyforreplacingaharddiskdriveora
solid-statedrive............19
Importantnoticeforreplacingasystem
board................20
Howtouseerrormessage........20
StrategyforreplacingFRUsforCTO,special-bid,
andstandardmodels............20
Productdefinition............20
FRUidentification............20
Chapter3.Generalcheckout.....23
Whattodofirst..............23
Checkoutguide..............24
LenovoCompanion...........24
Quicktestprograms...........24
UEFIdiagnosticprogram.........25
Bootablediagnosticprograms.......25
Powersystemcheckout...........26
Checkingtheacpoweradapter......26
Checkingthebatterypackandtheoperational
charging...............27
Checkingthecoin-cellbattery.......28
Chapter4.Relatedservice
information..............29
Recoveryinformation............29
Resettingyourcomputer.........29
Usingadvancedstartupoptions......29
RecoveringyouroperatingsystemifWindows
10failstostart.............29
CreatingandusingarecoveryUSBdrive..30
Passwords................30
Power-onpassword...........31
Harddiskpassword...........31
Supervisorpassword..........31
Howtoremovethepower-onpassword...31
Howtoremovetheharddiskpassword...32
Powermanagement............32
Sleepmode..............32
Hibernationmode...........33
Symptom-to-FRUindex...........33
Numericerrorcodes..........34
Errormessages............35
Beepsymptoms............35
No-beepsymptoms...........36
LCD-relatedsymptoms.........37
Intermittentproblems..........37
Undeterminedproblems.........38
Chapter5.Functionkeys.......39
Chapter6.Locations.........41
Locatingcomputercontrols,connectors,and
indicators.................41
Frontview...............41
Sideviews..............41
Bottomview..............42
Statusindicators............43
LocatingFRUsandCRUs..........44
MajorFRUsandCRUs..........45
LCDFRUs..............47
Miscellaneousparts...........48
Connectorandcableguide........48
LookingupFRUinformation.........51
Chapter7.FRUreplacement
notices................53
Screwnotices...............53
Retainingserialnumbers...........54
Restoringtheserialnumberofthesystem
unit.................54
RetainingtheUUID...........55
ReadingorwritingtheECAinformation...55
Chapter8.Removingorreplacinga
FRU..................57
Generalguidelines.............57
1010Micro-SIM-cardtray..........58
1020Batterypack.............58
1030Keyboardrubbers...........59
1040Keyboard..............59
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