Lenovo T550 Technical Information Page 26
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Attention:Thedrivestartupsequenceinthecomputeryouareservicingmayhavebeenchanged.Be
extremelycarefulduringwriteoperationssuchascopying,saving,orformatting.Ifyouselectanincorrect
drive,dataorprogramscanbeoverwritten.
Importantnoticeforreplacingasystemboard
Somecomponentsmountedonasystemboardareverysensitive.Improperhandlingofasystemboardcan
causedamagetothosecomponents,andmaycauseasystemmalfunction.
Attention:Whenhandlingasystemboard:
•Donotdropasystemboardorapplyanyexcessiveforcetoit.
•Avoidroughhandlingofanykind.
•AvoidbendingasystemboardandhardpushingtopreventcrackingateachBGA(BallGridArray)chipset.
Howtouseerrormessage
Usetheerrorcodesdisplayedonthescreentodiagnosefailures.Ifmorethanoneerrorcodeisdisplayed,
beginthediagnosiswiththefirsterrorcode.Whatevercausesthefirsterrorcodemayalsocausefalseerror
codes.Ifnoerrorcodeisdisplayed,seewhethertheerrorsymptomislistedintheSymptom-to-FRU
Indexforthecomputeryouareservicing.
StrategyforreplacingFRUsforCTO,special-bid,andstandardmodels
ThistopicprovidesinformationaboutthemodeltypesandFRUidentification.
Productdefinition
Thistopicintroducesdifferentmodeltypesandhowtoidentifyeachtype.
Dynamicconfigure-to-order(CTO)model
ThismodelprovidestheabilityforacustomertoconfigureaLenovosolutionfromaWebSite,andhavethis
configurationsenttofulfillment,whereitisbuiltandshippeddirectlytothecustomer.Themachinelabeland
eSupportwillloadtheseproductsasthe4-characterMT,4-charactermodel,and2-charactercountrycode.
Themodelis“CTO1”andthedefaultcountrycodeis“WW”(example:20A7CTO1WW).
Special-bidmodel
ThisisauniqueconfigurationthathasbeennegotiatedbetweenLenovoandthecustomer.Auniquemachine
typemodel(MTM)consistsofa4-characterMT,a4-charactermodel,andanumeric2-charactercountry
codeisprovidedtothecustomertoplaceorders(example:20A7000955).Thecountrycodeassignedis
numericanddoesnotdesignateaspecificcountryorregion.ThecustommodelfactsheetfortheMTM
indicateswhichcountrythespecialbidMTMissetupfor.Special-bidofferingisnotgenerallyannounced.
Standardmodel
Standardmodels(fixedconfiguration)areannouncedandofferedtoallcustomers.TheMTMportionofthe
machinelabelconsistsofa4-characterMT,a4-charactermodel,andanalphabetic2-charactercountry
code.Thecountrycodeassignedisalphabeticandrepresentsadesignatedcountryorregion(example:
20A70009UK).
FRUidentification
UseLenovoeSupporttoidentifymajorFRUs,FRUpartnumbers,andFRUdescriptionsforaproductat
anMT-serialnumberlevel.ExamplesofmajorFRUsareharddiskdrive,systemboard,andliquidcrystal
display(LCD).
ToidentifythemajorFRUsforaproduct,dothefollowing:
20HardwareMaintenanceManual
- HardwareMaintenanceManual 1
- FirstEdition(January2015) 2
- ©CopyrightLenovo2015 2
- Contents 3
- AppendixA.Notices.........103 4
- Aboutthismanual 5
- Chapter1.Safetyinformation 7
- Safetyinspectionguide 8
- Chapter1.Safetyinformation3 9
- Groundingrequirements 10
- Chapter1.Safetyinformation5 11
- 6HardwareMaintenanceManual 12
- .Safetyinformation7 13
- Chapter1.Safetyinformation9 15
- VORSICHT 17
- .Safetyinformation11 17
- 12HardwareMaintenanceManual 18
- .Safetyinformation13 19
- 14HardwareMaintenanceManual 20
- .Safetyinformation15 21
- 16HardwareMaintenanceManual 22
- .Safetyinformation17 23
- 18HardwareMaintenanceManual 24
- StrategyforreplacingFRUs 25
- Howtouseerrormessage 26
- Productdefinition 26
- FRUidentification 26
- 22HardwareMaintenanceManual 28
- Chapter3.Generalcheckout 29
- Checkoutguide 30
- LenovoSolutionCenter 30
- Quicktestprograms 30
- UEFIdiagnosticprogram 31
- Bootablediagnosticprograms 31
- Powersystemcheckout 32
- Checkingtheacpoweradapter 32
- Checkingthecoin-cellbattery 33
- 28HardwareMaintenanceManual 34
- Passwords 38
- Power-onpassword 38
- Harddiskpassword 38
- Supervisorpassword 39
- Powermanagement 40
- Sleepmode 40
- Hibernationmode 41
- Symptom-to-FRUindex 41
- Numericerrorcodes 42
- Errormessages 43
- Beepsymptoms 43
- No-beepsymptoms 44
- LCD-relatedsymptoms 44
- Intermittentproblems 44
- Undeterminedproblems 45
- 40HardwareMaintenanceManual 46
- Chapter5.Locations 47
- Left-sideview 48
- Bottomview 48
- LocatingFRUsandCRUs 49
- MajorFRUs 50
- Chapter5.Locations45 51
- 46HardwareMaintenanceManual 52
- Formodelswithtouchfunction: 53
- .Locations47 53
- Miscellaneouspart 54
- 48HardwareMaintenanceManual 54
- LookingupFRUinformation 55
- 50HardwareMaintenanceManual 56
- Commonservicetools 57
- Screwnotices 57
- 90degreesmore 58
- (Cross-section) 58
- 180degreesmore 58
- RetainingtheUUID 59
- Generalguidelines 61
- Beforeservicingthecomputer 62
- Disablingthebuilt-inbattery 62
- RemovingthemicroSIMcard 62
- RemovingamajorFRU 62
- 1010Removablebattery 63
- 1020Basecoverassembly 63
- 58HardwareMaintenanceManual 64
- 1030Keyboard 65
- Removalstepsofthekeyboard 66
- 60HardwareMaintenanceManual 66
- 62HardwareMaintenanceManual 68
- StepScrew(quantity)Color 70
- (1.85kgf-cm) 70
- 1050Memorymodule 72
- 1060WirelessLANcard 72
- 1070WirelessWANcard 73
- 1080M.2solid-statedrive 74
- 1090Coin-cellbattery 75
- 1130Thermalfan 79
- 1140Speakerassembly 81
- 1160Fingerprintreaderassembly 83
- Black0.181Nm 84
- 1180Systemboardassembly 85
- 1190LCDunit 87
- 1210Powerbuttonboard 89
- 1220Keyboardassembly 90
- 2010LCDbezelassembly 91
- 2020LCDpanelandLCDcable 91
- 2030Hingesandhingebrackets 92
- 2040Camera/microphonecard 93
- 2050LEDcableassembly 94
- 3010LCDfrontsheetbezel 98
- (3 kgf-cm) 99
- 3030Hinges 100
- 3040Camera/microphonecard 101
- 3050Touchsensorcard 102
- 3060LEDcableassembly 103
- .RemovingorreplacingaFRU99 105
- 102HardwareMaintenanceManual 108
- AppendixA.Notices 109
- Electronicemissionsnotices 110
- Trademarks 110
- *1PSP40G55010* 112
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