IBM X23, X24, X22, X20, X21 manual Retaining the Uuid

After you have replaced the system board, restore the serial number by doing the following:

1.Install the ThinkPad Hardware Maintenance Diskette Version 1.60 and restart the computer.

2.From the main menu, select 1. Set System

Identification.

3.Select 1. Add S/N data from EEPROM. Follow the instructions on the screen.

Note: The serial number of the system unit is written on the label attached on the bottom of the computer.

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 unique 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 1.60, and restart the computer.

2.Select 4. Assign UUID from the main menu. A new UUID is created and written. If a valid UUID already exists, it is not overwritten.

56ThinkPad X20, X21, X22, X23, X24