Retaining Serial Numbers - Lenovo 418734U - IdeaPad S9e 4187 Hardware Maintenance Manual

Retaining serial numbers

This section includes the following descriptions:
v "Restoring the Product Name and the P/N (part number) of the system unit"
v "Retaining the UUID"
Restoring the Product Name and the P/N (part number) of the
system unit
When the computer was manufactured, the EEPROM on the system board was
loaded with the Product Name and the P/N (part number) of the system unit.
These numbers need to remain the same throughout the life of the computer.
If you replace the system board, you must restore the Product Name and the P/N
of the system unit to their original values.
Before replacing the system board, find the original Product Name and P/N by
doing the following:
1. Boot the computer with DOS.
2. To see the Product Name, run the maintenance utility, FL1RW.EXE as follows:
3. To see the P/N, run the maintenance utility, FL1RW.EXE as follows:
4. Write down the result of each of these procedures.
Note: The Product Name and the P/N of the system unit are also written on the
label attached to the bottom of the computer.
After you have replaced the system board, restore the Product Name and the P/N
by doing the following:
1. Boot the computer with DOS.
2. To restore the product name, run the maintenance utility, FL1RW.EXE with the
3. To restore the P/N, run the maintenance utility, FL1RW.EXE with the '/w SN'
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.
52
IdeaPad S9e, S10e, and S10 Hardware Maintenance Manual
Table 11. the Product Name and the P/N
BIOS menu text
Product Name
P/N
> FL1RW.EXE /r MM
> FL1RW.EXE /r SN
'/w MM' option as the following example.
If the product name is "4068xxx," type the following command:
> FL1RW.EXE /w MM "4068xxx"
option as the following example.
If the P/N is "LxxNNNN," type the following command:
> FL1RW.EXE /w SN "LxxNNNN"
Meaning
Four digits for the machine type and three digits of the
model
The seven-digit serial number of the system unit