Hardware Maintenance Manual

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
Strategyforreplacingasolid-statedrive...19
Importantnoticeforreplacingasystem
board................20
Howtouseerrormessage........20
StrategyforreplacingFRUsforCTO,special-bid,
andstandardmodels............20
Productdefinition............20
FRUidentification............20
Chapter3.Generalcheckout.....23
Whattodofirst..............23
Checkoutguide..............24
LenovoSolutionCenter.........24
Quicktestprograms...........24
UEFIdiagnosticprogram.........25
Bootablediagnosticprograms.......25
Powersystemcheckout...........26
Checkingtheacpoweradapter......26
Checkingthebuilt-inbatteriesandoperational
charging...............27
Checkingthecoin-cellbattery.......27
Chapter4.Relatedservice
information..............29
Restoringthefactorycontentsbyusingthe
RecoveryDiscSet.............29
RecoveryoverviewfortheWindows10operating
system..................30
Resettingyourcomputer.........30
Usingadvancedstartupoptions......30
RecoveringyouroperatingsystemifWindows
10failstostart.............31
CreatingandusingarecoveryUSBdrive..31
Passwords................32
Power-onpassword...........32
Harddiskpassword...........32
Supervisorpassword..........32
Howtoremovethepower-onpassword...32
Howtoremovetheharddiskpassword...33
Powermanagement............33
Screenblankmode(fortheWindows7
operatingsystemonly)..........33
Sleepmode..............34
Hibernationmode...........34
Symptom-to-FRUindex...........34
Numericerrorcodes..........35
Errormessages............36
Beepsymptoms............37
No-beepsymptoms...........37
LCD-relatedsymptoms.........37
Intermittentproblems..........38
Undeterminedproblems.........38
Chapter5.Specialkeys........39
Chapter6.Locations.........41
Locatingcomputercontrols,connectors,and
indicators.................41
Frontview...............41
Leftview...............42
Bottomview..............42
Statusindicators............42
LocatingFRUsandCRUs..........44
MajorFRUs..............45
LCDFRUs..............47
MiscellaneouspartsandotherFRUs....48
LookingupFRUinformation.........49
Chapter7.FRUreplacement
notices................51
Screwnotices...............51
Retainingserialnumbers...........52
Restoringtheserialnumberofthesystem
unit.................52
RetainingtheUUID...........53
ReadingorwritingtheECAinformation...53
Chapter8.Removingorreplacinga
FRU..................55
Generalguidelines.............55
Beforeservicingthecomputer........56
Disablingthebuilt-inbatteries.......56
RemovingthemicroSIMcard.......56
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