ThinkPad X131e - Serial Number and UUID Management

•T orquedriver
Ifyouhaveatorquedriver,refertotheT orquecolumninthescrewinformationtableforeachstep.
–Ensurethatyouusethecorrectscrew.Itisrecommendedtousenewscrewsforreplacements.Ifyou
haveatorquescrewdriver,tightenallscrewsrmlytothetorquespeciedinthescrewinformation
tableforeachstep.
–Ensurethattorquescrewdriversarecalibratedcorrectlyfollowingcountryspecications.
Retainingserialnumbers
Thistopicprovidesinstructionsonthefollowing:
•“Restoringtheserialnumberofthesystemunit”onpage52
•“RetainingtheUUID”onpage53
•“ReadingorwritingtheECAinformation”onpage53
Restoringtheserialnumberofthesystemunit
Whenthecomputerwasmanufactured,theEEPROMonthesystemboardwasloadedwiththeserial
numbersofthesystemandallmajorcomponents.Thesenumbersneedtoremainthesamethroughout
thelifeofthecomputer.
Ifyoureplacethesystemboard,youmustrestoretheserialnumberofthesystemunittoitsoriginalvalue.
Beforereplacingthesystemboard,savetheoriginalserialnumberbydoingthefollowing:
1.InstalltheLENOVOThinkPadHardwareMaintenanceDisketteVersion1.76orlater,andrestartthe
computer.
2.Fromthemainmenu,select1.SetSystemIdentication.
3.Select2.ReadS/NdatafromEEPROM.Theserialnumberofeachdeviceinyourcomputeris
displayed;theserialnumberofthesystemunitislistedasfollows:
•20:Serialnumber
4.Writedownthatnumber.
Note:Theserialnumberofthesystemunitisalsowrittenonthelabelattachedtothebottomofthe
computer.
Afteryouhavereplacedthesystemboard,restoretheserialnumberbydoingthefollowing:
1.InstalltheLENOVOThinkPadHardwareMaintenanceDisketteVersion1.76orlaterandrestartthe
computer.
2.Fromthemainmenu,select1.SetSystemIdentication.
3.Select1.AddS/NdatafromEEPROM.Followtheinstructionsonthescreen.
IftheMTMandProductIDnumbersdifferfromeachotherontherearlabel,usewhatisshownforthe
ProductIDeld.Seethefollowingexample:
MTMontherearlabel:
TTTT-CTOS/NSSSSSSS
52HardwareMaintenanceManual