Hardware Maintenance Manual

180degreesmore
(Cross-section)
Notes:
•Ensurethatyouusethecorrectscrew.Itisrecommendedtousenewscrewsforreplacements.Ifyou
haveatorquescrewdriver,tightenallscrewsfirmlytothetorquespecifiedinthescrewinformation
tableforeachstep.
•Ensurethattorquescrewdriversarecalibratedcorrectlyfollowingcountryspecifications.
Retainingserialnumbers
Thistopicprovidesinstructionsonthefollowing:
•“Restoringtheserialnumberofthesystemunit”onpage52
•“RetainingtheUUID”onpage53
Restoringtheserialnumberofthesystemunit
Whenthecomputerwasmanufactured,theEEPROMonthesystemboardwasloadedwiththeserial
numbersofthesystemandallmajorcomponents.Thesenumbersneedtoremainthesamethroughout
thelifeofthecomputer.
Ifyoureplacethesystemboard,youmustrestoretheserialnumberofthesystemunittoitsoriginalvalue.
Theserialnumberofthesystemunitiswrittenonthelabelattachedtothebottomofthecomputer.
Ifyoucannotfindtheserialnumberofthesystemunitonthebottomofthecomputer,trythefollowing
methodtogetthenumber:
Note:Beforeyouperformtheoperation,ensurethattheUEFI/LegacysettingwithintheStartupmenuin
theThinkPadSetupprogramissettoUEFIOnly.
1.ConnectaUSBmemorykeytothecomputer.
2.Gotohttp://www.lenovo.com/maintenanceutilitiesandfollowtheinstructionsonthescreentocreatea
MaintenanceKey.
Note:OnlyanauthorizedLenovoservicetechniciancanaccesstheaboveWebsite.
3.Restartthecomputer.
4.Whenthelogoisdisplayed,pressEsc.TheThinkPadConfigInformationUpdateUtilityinterfaceis
displayed.
5.Type1underEntertheactiondesired,thenpressEnter.TheThinkPadSerialNumberUpdateUtilityfor
AssetIDscreenisdisplayed.
6.Type2underEntertheactiondesired,thenpressEnter.Theserialnumberofeachdeviceinyour
computerisdisplayed;theserialnumberofthesystemunitislistedasfollow:
20-Serialnumber
7.Recordtheserialnumberofthesystemunit.
Afteryoureplacethesystemboard,dothefollowingtorestoretheserialnumberofthesystemunit:
1.ConnecttheMaintenanceKeytothecomputer.
52ThinkPadT460sHardwareMaintenanceManual