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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
LenovoSolutionCenter.........24
Quicktestprograms...........24
UEFIdiagnosticprogram.........25
Bootablediagnosticprograms.......26
Powersystemcheckout...........26
Checkingtheacpoweradapter......27
Checkingthebatteryandoperational
charging...............27
Checkingthecoin-cellbattery.......28
Chapter4.Relatedservice
information..............29
Restoringthefactorycontentsbyusingthe
RecoveryDiscSet.............29
UsingtheWindowsrecoverysolutions(for
Windows8andWindows8.1only).......30
Passwords................33
Power-onpassword...........33
Harddiskpassword...........33
Supervisorpassword..........33
Howtoremovethepower-onpassword...34
Howtoremovetheharddiskpassword...34
Powermanagement............35
Screenblankmode(fortheWindows7
operatingsystemonly)..........35
Sleepmode..............35
Hibernationmode...........35
Symptom-to-FRUindex...........36
Numericerrorcodes..........36
Errormessages............38
Beepsymptoms............38
No-beepsymptoms...........39
LCD-relatedsymptoms.........39
Intermittentproblems..........39
Undeterminedproblems.........40
Chapter5.Statusindicators.....41
Chapter6.Functionkeys.......43
Chapter7.Locations.........45
Locatingcomputercontrols,connectors,and
indicators.................45
Frontview...............45
Rearview...............46
Bottomview..............46
LocatingFRUsandCRUs..........47
MajorFRUs..............48
LCDFRUs..............50
MiscellaneouspartsandotherFRUs....53
LookingupFRUinformation.........53
Chapter8.FRUreplacement
notices................55
Screwnotices...............55
Retainingserialnumbers...........56
Restoringtheserialnumberofthesystem
unit.................56
RetainingtheUUID...........57
ReadingorwritingtheECAinformation...57
Chapter9.Removingorreplacinga
FRU..................59
Generalguidelines.............59
Beforeservicingthecomputer........60
Disablingthebuilt-inbattery.......60
RemovingtheSIMcard.........60
RemovingamajorFRU...........61
1010Externalbatterypack........61
1020Basecover............61
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