Lenovo THINKPAD T41/T41P Bedienungsanleitung PDF herunterladen (Seite 74)

Retaining the UUID

The Universally Unique Identifier (UUID) is a 128-bit

number uniquely assigned to your computer at production

and stored in the EEPROM of your system board. The

algorithm that generates the number is designed to provide

unique IDs until the year A.D. 3400. No two computers in

the world have the same number.

When you replace the system board, you must set the

UUID on the new system board as follows:

1. Install the ThinkPad Hardware Maintenance Diskette

Version 1.73 or later, and restart the computer.

2. From the main menu, select 4. Assign UUID.

A new UUID is created and written. If a valid UUID

already exists, it is not overwritten.

Reading or writing the ECA information

Information on Engineering Change Announcements (ECA)

are stored in the EEPROM of the system board. The

electronic storage of this information simplifies the

procedure to check if the ECA has been previously applied

to a machine. The machine does not need to be

disassembled to check for the ECA application.

To check what ECAs have been previously applied to the

machine, use the ECA Information Read/Write function on

the ThinkPad Hardware Maintenance Diskette Version 1.73

or later.

1. Insert the ThinkPad Hardware Maintenance Diskette

Version 1.73 or later, and restart the computer.

2. From the main menu, select 6. Set ECA Information.

3. To read ECA information, select 2. Read ECA/rework

number from EEPROM and follow the instruction.

4. To read box build date, select 5. Read box build date

from EEPROM, and follow the instruction on the

screen.

After an ECA has been applied to the machine, the

EEPROM must be updated to reflect the ECA's

application. Use the ThinkPad Hardware Maintenance

Diskette Version 1.73 or later to update the EEPROM.

Note: Only the ECA number is stored in the EEPROM.

The machine type of the ECA is assumed be the

same as the machine type of the machine that had

the ECA applied to it.

1. Insert the ThinkPad Hardware Maintenance Diskette

Version 1.73 or later, and restart the computer.

2. From the main menu, select 6. Set ECA Information.

FRU replacement notices

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