Laptop User Manual

•T orquedriver
Ifyouhaveatorquedriver,refertotheTorquecolumninthescrewinformationtableforeachstep.
–Makesurethatyouusethecorrectscrew.Itisrecommendedtousenewscrewsforreplacements.If
youhaveatorquescrewdriver,tightenallscrewsrmlytothetorquespeciedinthescrewinformation
tableforeachstep.
–Ensuretorquescrewdriversarecalibratedcorrectlyfollowingcountryspecications.
Retainingserialnumbers
Thissectionincludesthefollowingdescriptions:
•“Restoringtheserialnumberofthesystemunit”onpage64
•“RetainingtheUUID”onpage65
•“ReadingorwritingtheECAinformation”onpage65
Restoringtheserialnumberofthesystemunit
Whenthecomputerwasmanufactured,theEEPROMonthesystemboardwasloadedwiththeserial
numbersofthesystemandallmajorcomponents.Thesenumbersneedtoremainthesamethroughout
thelifeofthecomputer.
Ifyoureplacethesystemboard,youmustrestoretheserialnumberofthesystemunittoitsoriginalvalue.
Beforereplacingthesystemboard,savetheoriginalserialnumberbydoingthefollowing:
1.InstallthelatestversionofLENOVOThinkPadHardwareMaintenanceDisketteorMaintenanceKey,
andthenrestartthecomputer.
2.Fromthemainmenu,select1.Setsystemidentication.
3.Turnoffthecomputer,andthenturnonthecomputeragain.
4.WhentheThinkPadlogoisdisplayed,pressEsc.
5.Select2.ReadS/NdatafromEEPROMandfollowtheinstructionsonthescreen.Theserialnumberof
eachdeviceinyourcomputerisdisplayed;theserialnumberofthesystemunitislistedasfollows:
•20Serialnumber
6.Writedownthatnumber.
Note:Theserialnumberofthesystemunitisalsowrittenonthelabelattachedtothebottomofthe
computer.
Afteryouhavereplacedthesystemboard,restoretheserialnumberbydoingthefollowing:
1.InstallthelatestversionofLENOVOThinkPadHardwareMaintenanceDisketteorMaintenanceKey,
andthenrestartthecomputer.
2.Fromthemainmenu,select1.Setsystemidentication.
3.Turnoffthecomputer,andthenturnonthecomputeragain.
4.WhentheThinkPadlogoisdisplayed,pressEsc.
5.Select1.AddS/NdatafromEEPROM.Followtheinstructionsonthescreen.
64HardwareMaintenanceManual