System Board Replacement Notice

System Board Replacement Notice for TP 770E and TP 600

Restoring the System Unit Serial Number: The EEPROM on the system board contains vital product data (VPD), such as the system unit serial number and the system board serial number. 
You must restore the system unit serial number to its original number when the system board is replaced.

To restore the system unit serial number, do the following:

1. Press and hold F1 and power on the computer.
2. Hold down F1 until the Easy-Setup menu appears.
3. Click on Config
4. Press Ctrl+N. The system Unit Serial Number menu appears.
5. Follow the instructions on the menu.

Notes:

1. Do not power-off the computer during the restoration process.
2. The serial number label is attached to the bottom of the computer.

Notice for 770X and 600E

Serial Numbers: When the computer was manufactured, the EEPROM on the system board was loaded with the serial numbers of the system and all major components. 
The EEPROM contains the following serial numbers:

• System board serial number
• System Unit serial number
• CPU Card serial number
• DC-DC Card serial number

You must restore each of those serial numbers except the system board serial number to its original number when replacing the system board.

To save the original serial numbers, do the following:

1. Boot from DOS, or open an MS-DOS prompt.
2. Insert the ThinkPad Hardware Maintenance Diskette Version 1.05 into the diskette drive.
3. Enter A:\SERUPDT.EXE at the DOS prompt.

   NOTE: SERUPDT.EXE is in the ThinkPad Hardware Maintenance Diskette Version 1.05 or a later version.

4. Enter SERUPDT R

   Each serial numbers is displayed with its device type. 
    Write down all the numbers except the system board serial number. 
    The device type designations for each serial number are as follows:

   08: CPU card serial number 
     20: System unit serial number 
     38: DC-DC card serial number 
     40: System board serial number 
     78-7F: Hard disk drive serial number

   NOTE: You can disregard the hard disk drive serial number.

To restore the serial numbers, do the following:

1. Boot from DOS, or open a MS-DOS prompt.
2. Enter SERUPDT.EXE at the DOS prompt. 
    The usage of this tool is displayed.
3. Enter SERUPDT W nn SSSSSSS for each serial number you saved.

NOTES:

1. nn is the device type, and SSSSSS is the serial number.
2. The system unit serial numberis written in the label attached on  the bottom of the computer.

Universally Unique IDentifier (UUID)

The UUID is a 128-bit number uniquely assigned to the computer a production and stored in the EEPROM on the system board. 
The algorithm that generates the unique number is designed to provide unique IDs until year A.D. 3400. 
Consequently, 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. Press and hold F1 and power on the computer.
2. Hold down F1 until the Easy-Setup menu appears.
3. Click on Config.
4. Press Ctrl+G. The UUID menu appears.
5. Press F5 to generate a new UUID, and press Enter to overwrite it to EEPROM.

CPU Card Replacement Notice 600E and 770X Only

You must restore the CPU card serial number to its original number, when the CPU card is replaced. 
To save and restore the CPU card serial number, follow the above described Serial Number  update instruction.

DC-DC Card Replacement Notice 600E and 770X Only

You must restore the DC-DC card serial number to its original number, when the DC-DC card is replaced. 
To save and restore the DC-DC card serial number, follow the above described Serial Number  update instruction.

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