User Manual

Table Of Contents

3. To read the ECA information, select 2. Read ECA/rework number from EEPROM and follow the

instructions on the screen. To read the 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 latest version of LENOVO ThinkPad Hardware Maintenance Diskette or Maintenance

Key to update the EEPROM.

Note: Only the ECA number is stored in the EEPROM. The machine type of the ECA is assumed to be the

same as the machine type of the machine that had the ECA applied to it.

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

instructions on the screen. To write the 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.

ThinkPad X1 Nano Gen 2 Hardware Maintenance Manual