Lenovo ThinkPad W541 (English) Hardware Maintenance Manual - ThinkPad T540p, W - Page 62

Set ECA Information, Write ECA/rework number from EEPROM, Write box build date from EEPROM

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1. Insert the latest version of LENOVO ThinkPad Hardware Maintenance Diskette or Maintenance Key, and then restart the computer. 2. From the main menu, select 6. Set ECA Information. 3. To write the ECA information, select 1. Write ECA/rework number from EEPROM, and follow the instruction; To write box build date, select 4. Write box build date from EEPROM, and follow the instruction on the screen. If the system board is being replaced, try to read the ECA information from the old system board and transfer the information to the new system. If the system board is inoperable, this will not be possible. 56 Hardware Maintenance Manual

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1.InsertthelatestversionofLENOVOThinkPadHardwareMaintenanceDisketteorMaintenanceKey,
andthenrestartthecomputer.
2. From the main menu, select
6. Set ECA Information
.
3. To write the ECA information, select
1. Write ECA/rework number from EEPROM
,andfollowthe
instruction;Towriteboxbuilddate,select
4. Write box build date from EEPROM
,andfollowthe
instructiononthescreen.
Ifthesystemboardisbeingreplaced,trytoreadtheECAinformationfromtheoldsystemboardandtransfer
theinformationtothenewsystem.Ifthesystemboardisinoperable,thiswillnotbepossible.
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HardwareMaintenanceManual