Hardware Maintenance Manual

ReadingorwritingtheECAinformation

InformationonEngineeringChangeAnnouncements(ECA)arestoredintheEEPROMofthesystemboard.

TheelectronicstorageofthisinformationsimpliﬁestheproceduretocheckiftheECAhasbeenpreviously

appliedtoamachine.ThemachinedoesnotneedtobedisassembledtocheckfortheECAapplication.

TocheckwhatECAshavebeenpreviouslyappliedtothemachine,usetheECAInformationRead/Write

functionontheUSBMaintenanceKey.

1.InserttheMaintenanceKeyandrestartthecomputer.

2.Fromthemainmenu,select6.SetECAInformation.

3.ToreadtheECAinformation,select2.ReadECA/reworknumberfromEEPROMandfollowthe

instructionsonthescreen.

4.Toreadtheboxbuilddate,select5.ReadboxbuilddatefromEEPROM,andfollowtheinstructionon

thescreen.

AfteranECAhasbeenappliedtothemachine,theEEPROMmustbeupdatedtoreﬂecttheECA's

application.UsetheMaintenanceKeytoupdatetheEEPROM.

Note:OnlytheECAnumberisstoredintheEEPROM.ThemachinetypeoftheECAisassumedtobethe

sameasthemachinetypeofthemachinethathadtheECAappliedtoit.

1.InserttheMaintenanceKeyandrestartthecomputer.

2.Fromthemainmenu,select6.SetECAInformation.

3.TowritetheECAinformation,select1.WriteECA/reworknumberfromEEPROM,andfollowthe

instructionsonthescreen.

4.Towritetheboxbuilddate,select4.WriteboxbuilddatefromEEPROM,andfollowtheinstructionon

thescreen.

Ifthesystemboardisbeingreplaced,trytoreadtheECAinformationfromtheoldsystemboardandtransfer

theinformationtothenewsystem.Ifthesystemboardisinoperable,thiswillnotbepossible.

52ThinkPad11eandThinkPadYoga11eHardwareMaintenanceManual