Lenovo Yoga 370 Hardware Maintenance Manual
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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
Strategyforreplacingastoragedrive....19
Importantnoticeforreplacingasystem
board................20
Howtouseerrormessage........20
StrategyforreplacingFRUsforCTO,specialbid
model,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
Checkingthebuilt-inbatteryandoperational
charging...............27
Checkingthecoin-cellbattery.......27
Chapter4.Relatedservice
information..............29
Recoveryinformation............29
Resettingyourcomputer.........29
Usingadvancedstartupoptions......29
RecoveringyouroperatingsystemifWindows
10failstostart.............29
CreatingandusingarecoveryUSBdrive..30
Passwords................31
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
Beeperrors..............35
No-beepsymptoms...........37
LCD-relatedsymptoms.........37
Intermittentproblems..........37
Undeterminedproblems.........38
Chapter5.Functionkeys.......39
Chapter6.Locations.........41
Locatingcomputercontrols,connectors,and
indicators.................41
Frontview...............41
Rearview...............42
Statusindicators............42
LocatingFRUsandCRUs..........45
MajorFRUs..............46
LCDFRUs..............48
Miscellaneousparts...........49
Connectorandcableguide........49
LookingupFRUinformation.........52
Chapter7.FRUreplacement
notices................53
Screwnotices...............53
Retainingserialnumbers...........54
Restoringtheserialnumberofthesystem
unit.................54
RetainingtheUUID...........55
Chapter8.Removingorreplacinga
FRU..................57
Generalguidelines.............57
Beforeservicingthecomputer........58
Disablingthebuilt-inbattery.......58
1010ThinkPadPenProordummycap.....58
1020Micro-SIM-cardtray(availableonsome
models).................59
1030Basecoverassembly..........59
1040Battery...............60
1050Hallsensorcard............61
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